Importing data into FiftyOne¶

The first step to using FiftyOne is to load your data into a dataset. FiftyOne supports automatic loading of datasets stored in various common formats. If your dataset is stored in a custom format, don’t worry, FiftyOne also provides support for easily loading datasets in custom formats.

Check out the sections below to see which import pattern is the best fit for your data.

Note

Did you know? You can import media and/or labels from within the FiftyOne App by installing the @voxel51/io plugin!

Note

When you create a Dataset, its samples and all of their fields (metadata, labels, custom fields, etc.) are written to FiftyOne’s backing database.

Important: Samples only store the filepath to the media, not the raw media itself. FiftyOne does not create duplicate copies of your data!

Custom formats¶

The simplest and most flexible approach to loading your data into FiftyOne is to iterate over your data in a simple Python loop, create a Sample for each data + label(s) pair, and then add those samples to a Dataset.

FiftyOne provides label types for common tasks such as classification, detection, segmentation, and many more. The examples below give you a sense of the basic workflow for a few tasks.

import glob
import fiftyone as fo

images_patt = "/path/to/images/*"

# Ex: your custom label format
annotations = {
    "/path/to/images/000001.jpg": "dog",
    ....,
}

# Create samples for your data
samples = []
for filepath in glob.glob(images_patt):
    sample = fo.Sample(filepath=filepath)

    # Store classification in a field name of your choice
    label = annotations[filepath]
    sample["ground_truth"] = fo.Classification(label=label)

    samples.append(sample)

# Create dataset
dataset = fo.Dataset("my-classification-dataset")
dataset.add_samples(samples)

import glob
import fiftyone as fo

images_patt = "/path/to/images/*"

# Ex: your custom label format
annotations = {
    "/path/to/images/000001.jpg": [
        {"bbox": ..., "label": ...},
        ...
    ],
    ...
}

# Create samples for your data
samples = []
for filepath in glob.glob(images_patt):
    sample = fo.Sample(filepath=filepath)

    # Convert detections to FiftyOne format
    detections = []
    for obj in annotations[filepath]:
        label = obj["label"]

        # Bounding box coordinates should be relative values
        # in [0, 1] in the following format:
        # [top-left-x, top-left-y, width, height]
        bounding_box = obj["bbox"]

        detections.append(
            fo.Detection(label=label, bounding_box=bounding_box)
        )

    # Store detections in a field name of your choice
    sample["ground_truth"] = fo.Detections(detections=detections)

    samples.append(sample)

# Create dataset
dataset = fo.Dataset("my-detection-dataset")
dataset.add_samples(samples)

import fiftyone as fo

video_path = "/path/to/video.mp4"

# Ex: your custom label format
frame_labels = {
    1: {
        "weather": "sunny",
        "objects": [
            {
                "label": ...
                "bbox": ...
            },
            ...
        ]
    },
    ...
}

# Create video sample with frame labels
sample = fo.Sample(filepath=video_path)
for frame_number, labels in frame_labels.items():
    frame = fo.Frame()

    # Store a frame classification
    weather = labels["weather"]
    frame["weather"] = fo.Classification(label=weather)

    # Convert detections to FiftyOne format
    detections = []
    for obj in labels["objects"]:
        label = obj["label"]

        # Bounding box coordinates should be relative values
        # in [0, 1] in the following format:
        # [top-left-x, top-left-y, width, height]
        bounding_box = obj["bbox"]

        detections.append(
            fo.Detection(label=label, bounding_box=bounding_box)
        )

    # Store object detections
    frame["objects"] = fo.Detections(detections=detections)

    # Add frame to sample
    sample.frames[frame_number] = frame

# Create dataset
dataset = fo.Dataset("my-labeled-video-dataset")
dataset.add_sample(sample)

Note

Using Dataset.add_samples() to add batches of samples to your datasets can be significantly more efficient than adding samples one-by-one via Dataset.add_sample().

Note

If you use the same custom data format frequently in your workflows, then writing a custom dataset importer is a great way to abstract and streamline the loading of your data into FiftyOne.

Common formats¶

If your data is stored on disk in one of the many common formats supported natively by FiftyOne, then you can load your data into a Dataset via Python or the CLI with the following simple pattern:

You can import a Dataset from disk via the Dataset.from_dir() factory method.

If your data is stored in the canonical format of the type you’re importing, then you can load it by providing the dataset_dir and dataset_type parameters:

import fiftyone as fo

# The directory containing the dataset to import
dataset_dir = "/path/to/dataset"

# The type of the dataset being imported
dataset_type = fo.types.COCODetectionDataset  # for example

# Import the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=dataset_type,
)

Alternatively, when importing labeled datasets in formats such as COCO, you may find it more natural to provide the data_path and labels_path parameters to independently specify the location of the source media on disk and the annotations file containing the labels to import:

# The directory containing the source images
data_path = "/path/to/images"

# The path to the COCO labels JSON file
labels_path = "/path/to/coco-labels.json"

# Import the dataset
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.COCODetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
)

Many formats like COCO also support storing absolute filepaths to the source media directly in the labels, in which case you can provide only the labels_path parameter:

# The path to a COCO labels JSON file containing absolute image paths
labels_path = "/path/to/coco-labels.json"

# Import the dataset
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.COCODetectionDataset,
    labels_path=labels_path,
)

In general, you can pass any parameter for the DatasetImporter of the format you’re importing to Dataset.from_dir(). For example, most builtin importers support optional max_samples, shuffle, and seed parameters, which provide support for importing a small subset of a potentially large dataset:

# Import a random subset of 10 samples from the dataset
dataset = fo.Dataset.from_dir(
    ...,
    max_samples=10,
    shuffle=True,
    seed=51,
)

You can import a dataset from disk into FiftyOne via the CLI.

If your data is stored in the canonical format of the type you’re importing, then you can load it by providing the --dataset-dir and --type options:

# A name for the dataset
NAME=my-dataset

# The directory containing the dataset to import
DATASET_DIR=/path/to/dataset

# The type of the dataset being imported
# Any subclass of `fiftyone.types.Dataset` is supported
TYPE=fiftyone.types.COCODetectionDataset  # for example

# Import the dataset
fiftyone datasets create --name $NAME --dataset-dir $DATASET_DIR --type $TYPE

Alternatively, when importing labeled datasets in formats such as COCO, you may find it more natural to provide the data_path and labels_path parameters via the kwargs option to independently specify the location of the source media on disk and the annotations file containing the labels to import:

# The directory containing the source images
DATA_PATH=/path/to/images

# The path to the COCO labels JSON file
LABELS_PATH=/path/to/coco-labels.json

# Import the dataset
fiftyone datasets create --name my-dataset \
    --type fiftyone.types.COCODetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Many formats like COCO also support storing absolute filepaths to the source media directly in the labels, in which case you can provide only the labels_path parameter:

# The path to a COCO labels JSON file containing absolute image paths
LABELS_PATH=/path/to/coco-labels.json

# Import the dataset
fiftyone datasets create --name my-dataset \
    --type fiftyone.types.COCODetectionDataset \
    --kwargs labels_path=$LABELS_PATH

In general, you can pass any parameter for the DatasetImporter of the format you’re importing via the kwargs option. For example, most builtin importers support optional max_samples, shuffle, and seed parameters, which provide support for importing a small subset of a potentially large dataset:

# Import a random subset of 10 samples from the dataset
fiftyone datasets create \
    --name $NAME --dataset-dir $DATASET_DIR --type $TYPE \
    --kwargs \
        max_samples=10 \
        shuffle=True \
        seed=51

Note

Jump to this section to see a full list of supported import formats.

Note

Did you know? You can write custom importers to streamline import of data in custom formats.

Loading media¶

If you’re just getting started with a project and all you have is a bunch of media files, you can easily load them into a FiftyOne dataset and start visualizing them in the App.

You can use the Dataset.from_images(), Dataset.from_images_dir(), and Dataset.from_images_patt() factory methods to load your images into FiftyOne:

import fiftyone as fo

# Create a dataset from a list of images
dataset = fo.Dataset.from_images(
    ["/path/to/image1.jpg", "/path/to/image2.jpg", ...]
)

# Create a dataset from a directory of images
dataset = fo.Dataset.from_images_dir("/path/to/images")

# Create a dataset from a glob pattern of images
dataset = fo.Dataset.from_images_patt("/path/to/images/*.jpg")

session = fo.launch_app(dataset)

You can also use Dataset.add_images(), Dataset.add_images_dir(), and Dataset.add_images_patt() to add images to an existing dataset.

You can use the fiftyone app view command from the CLI to quickly browse images in the App without creating a (persistent) FiftyOne dataset:

# View a glob pattern of images in the App
fiftyone app view --images-patt '/path/to/images/*.jpg'

# View a directory of images in the App
fiftyone app view --images-dir '/path/to/images'

You can use the Dataset.from_videos(), Dataset.from_videos_dir(), and Dataset.from_videos_patt() factory methods to load your videos into FiftyOne:

import fiftyone as fo

# Create a dataset from a list of videos
dataset = fo.Dataset.from_videos(
    ["/path/to/video1.mp4", "/path/to/video2.mp4", ...]
)

# Create a dataset from a directory of videos
dataset = fo.Dataset.from_videos_dir("/path/to/videos")

# Create a dataset from a glob pattern of videos
dataset = fo.Dataset.from_videos_patt("/path/to/videos/*.mp4")

session = fo.launch_app(dataset)

You can also use Dataset.add_videos(), Dataset.add_videos_dir(), and Dataset.add_videos_patt() to add videos to an existing dataset.

You can use the fiftyone app view command from the CLI to quickly browse videos in the App without creating a (persistent) FiftyOne dataset:

# View a glob pattern of videos in the App
fiftyone app view --videos-patt '/path/to/videos/*.mp4'

# View a directory of videos in the App
fiftyone app view --videos-dir '/path/to/videos'

Adding model predictions¶

Once you’ve created a dataset and ground truth labels, you can easily add model predictions to take advantage of FiftyOne’s evaluation capabilities.

If you have model predictions stored in COCO format, then you can use add_coco_labels() to conveniently add the labels to an existing dataset.

The example below demonstrates a round-trip export and then re-import of both images-and-labels and labels-only data in COCO format:

import fiftyone as fo
import fiftyone.zoo as foz
import fiftyone.utils.coco as fouc

dataset = foz.load_zoo_dataset("quickstart")
classes = dataset.distinct("predictions.detections.label")

# Export images and ground truth labels to disk
dataset.export(
    export_dir="/tmp/coco",
    dataset_type=fo.types.COCODetectionDataset,
    label_field="ground_truth",
    classes=classes,
)

# Export predictions
dataset.export(
    dataset_type=fo.types.COCODetectionDataset,
    labels_path="/tmp/coco/predictions.json",
    label_field="predictions",
    classes=classes,
)

# Now load ground truth labels into a new dataset
dataset2 = fo.Dataset.from_dir(
    dataset_dir="/tmp/coco",
    dataset_type=fo.types.COCODetectionDataset,
    label_field="ground_truth",
    label_types="detections",
)

# And add model predictions
fouc.add_coco_labels(
    dataset2,
    "predictions",
    "/tmp/coco/predictions.json",
    classes,
)

# Verify that ground truth and predictions were imported as expected
print(dataset.count("ground_truth.detections"))
print(dataset2.count("ground_truth.detections"))
print(dataset.count("predictions.detections"))
print(dataset2.count("predictions.detections"))

Note

See add_coco_labels() for a complete description of the available syntaxes for loading COCO-formatted predictions to an existing dataset.

If you have model predictions stored in YOLO format, then you can use add_yolo_labels() to conveniently add the labels to an existing dataset.

The example below demonstrates a round-trip export and then re-import of both images-and-labels and labels-only data in YOLO format:

import fiftyone as fo
import fiftyone.zoo as foz
import fiftyone.utils.yolo as fouy

dataset = foz.load_zoo_dataset("quickstart")
classes = dataset.distinct("predictions.detections.label")

# Export images and ground truth labels to disk
dataset.export(
    export_dir="/tmp/yolov4",
    dataset_type=fo.types.YOLOv4Dataset,
    label_field="ground_truth",
    classes=classes,
)

# Export predictions
dataset.export(
    dataset_type=fo.types.YOLOv4Dataset,
    labels_path="/tmp/yolov4/predictions",
    label_field="predictions",
    classes=classes,
)

# Now load ground truth labels into a new dataset
dataset2 = fo.Dataset.from_dir(
    dataset_dir="/tmp/yolov4",
    dataset_type=fo.types.YOLOv4Dataset,
    label_field="ground_truth",
)

# And add model predictions
fouy.add_yolo_labels(
    dataset2,
    "predictions",
    "/tmp/yolov4/predictions",
    classes,
)

# Verify that ground truth and predictions were imported as expected
print(dataset.count("ground_truth.detections"))
print(dataset2.count("ground_truth.detections"))
print(dataset.count("predictions.detections"))
print(dataset2.count("predictions.detections"))

Note

See add_yolo_labels() for a complete description of the available syntaxes for loading YOLO-formatted predictions to an existing dataset.

Model predictions stored in other formats can always be loaded iteratively through a simple Python loop.

The example below shows how to add object detection predictions to a dataset, but many other label types are also supported.

import fiftyone as fo

# Ex: your custom predictions format
predictions = {
    "/path/to/images/000001.jpg": [
        {"bbox": ..., "label": ..., "score": ...},
        ...
    ],
    ...
}

# Add predictions to your samples
for sample in dataset:
    filepath = sample.filepath

    # Convert predictions to FiftyOne format
    detections = []
    for obj in predictions[filepath]:
        label = obj["label"]
        confidence = obj["score"]

        # Bounding box coordinates should be relative values
        # in [0, 1] in the following format:
        # [top-left-x, top-left-y, width, height]
        bounding_box = obj["bbox"]

        detections.append(
            fo.Detection(
                label=label,
                bounding_box=bounding_box,
                confidence=confidence,
            )
        )

    # Store detections in a field name of your choice
    sample["predictions"] = fo.Detections(detections=detections)

    sample.save()

Note

If you are in need of a model to run on your dataset, check out the FiftyOne Model Zoo.

Built-in formats¶

FiftyOne provides a variety of built-in importers for common data formats.

Each data format is represented by a subclass of fiftyone.types.Dataset, which is used by the Python library and CLI to refer to the corresponding dataset format when reading the dataset from disk.

Dataset Type	Description
Image Directory	A directory of images.
Video Directory	A directory of videos.
Media Directory	A directory of media files.
Image Classification Directory Tree	A directory tree whose subfolders define an image classification dataset.
Video Classification Directory Tree	A directory tree whose subfolders define a video classification dataset.
FiftyOne Image Classification	A labeled dataset consisting of images and their associated classification labels in a simple JSON format.
TF Image Classification	A labeled dataset consisting of images and their associated classification labels stored as TFRecords.
COCO	A labeled dataset consisting of images and their associated object detections saved in COCO Object Detection Format.
VOC	A labeled dataset consisting of images and their associated object detections saved in VOC format.
KITTI	A labeled dataset consisting of images and their associated object detections saved in KITTI format.
YOLOv4	A labeled dataset consisting of images and their associated object detections saved in YOLOv4 format.
YOLOv5	A labeled dataset consisting of images and their associated object detections saved in YOLOv5 format.
FiftyOne Object Detection	A labeled dataset consisting of images and their associated object detections stored in a simple JSON format.
FiftyOne Temporal Detection	A labeled dataset consisting of videos and their associated temporal detections in a simple JSON format.
TF Object Detection	A labeled dataset consisting of images and their associated object detections stored as TFRecords in TF Object Detection API format .
Image Segmentation Directory	A labeled dataset consisting of images and their associated semantic segmentations stored as images on disk.
CVAT Image	A labeled dataset consisting of images and their associated multitask labels stored in CVAT image format.
CVAT Video	A labeled dataset consisting of videos and their associated multitask labels stored in CVAT video format.
OpenLABEL Image	A labeled dataset consisting of images and their associated multitask labels stored in OpenLABEL format.
OpenLABEL Video	A labeled dataset consisting of videos and their associated multitask labels stored in OpenLABEL format.
BDD	A labeled dataset consisting of images and their associated multitask predictions saved in Berkeley DeepDrive (BDD) format.
CSV	A labeled dataset consisting of images or videos and their associated field values stored as columns of a CSV file.
DICOM	An image dataset whose image data and optional properties are stored in DICOM format.
GeoJSON	An image or video dataset whose location data and labels are stored in GeoJSON format.
GeoTIFF	An image dataset whose image and geolocation data are stored in GeoTIFF format.
FiftyOne Dataset	A dataset consisting of an entire serialized `Dataset` and its associated source media.
FiftyOne Image Labels	A labeled dataset consisting of images and their associated multitask predictions stored in ETA ImageLabels format .
FiftyOne Video Labels	A labeled dataset consisting of videos and their associated multitask predictions stored in ETA VideoLabels format .
Custom formats	Import datasets in custom formats by defining your own `Dataset` or `DatasetImporter` class.

Image Directory¶

The fiftyone.types.ImageDirectory type represents a directory of images.

Datasets of this type are read in the following format:

<dataset_dir>/
    <filename1>.<ext>
    <filename2>.<ext>

where files with non-image MIME types are omitted.

By default, the dataset may contain nested subfolders of images, which are recursively listed.

Note

See ImageDirectoryImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a directory of images as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/images-dir"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.ImageDirectory,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/images-dir

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageDirectory

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a directory of images in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/images-dir

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageDirectory

Video Directory¶

The fiftyone.types.VideoDirectory type represents a directory of videos.

Datasets of this type are read in the following format:

<dataset_dir>/
    <filename1>.<ext>
    <filename2>.<ext>

where files with non-video MIME types are omitted.

By default, the dataset may contain nested subfolders of videos, which are recursively listed.

Note

See VideoDirectoryImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a directory of videos as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/videos-dir"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.VideoDirectory,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/videos-dir

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VideoDirectory

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a directory of videos in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/videos-dir

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VideoDirectory

Media Directory¶

The fiftyone.types.MediaDirectory type represents a directory of media files.

Datasets of this type are read in the following format:

<dataset_dir>/
    <filename1>.<ext>
    <filename2>.<ext>

Note

All files must have the same media type (image, video, point cloud, etc.)

By default, the dataset may contain nested subfolders of media files, which are recursively listed.

Note

See MediaDirectoryImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a directory of media files as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/media-dir"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.MediaDirectory,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/media-dir

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.MediaDirectory

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a directory of media in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/media-dir

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.MediaDirectory

Image Classification Dir Tree¶

The fiftyone.types.ImageClassificationDirectoryTree type represents a directory tree whose subfolders define an image classification dataset.

Datasets of this type are read in the following format:

<dataset_dir>/
    <classA>/
        <image1>.<ext>
        <image2>.<ext>
        ...
    <classB>/
        <image1>.<ext>
        <image2>.<ext>
        ...
    ...

Unlabeled images are stored in a subdirectory named _unlabeled.

Each class folder may contain nested subfolders of images.

Note

See ImageClassificationDirectoryTreeImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image classification directory tree stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/image-classification-dir-tree"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.ImageClassificationDirectoryTree,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/image-classification-dir-tree

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageClassificationDirectoryTree

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view an image classification directory tree in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/image-classification-dir-tree

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageClassificationDirectoryTree

Video Classification Dir Tree¶

The fiftyone.types.VideoClassificationDirectoryTree type represents a directory tree whose subfolders define a video classification dataset.

Datasets of this type are read in the following format:

<dataset_dir>/
    <classA>/
        <video1>.<ext>
        <video2>.<ext>
        ...
    <classB>/
        <video1>.<ext>
        <video2>.<ext>
        ...
    ...

Unlabeled videos are stored in a subdirectory named _unlabeled.

Each class folder may contain nested subfolders of videos.

Note

See VideoClassificationDirectoryTreeImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a video classification directory tree stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/video-classification-dir-tree"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.VideoClassificationDirectoryTree,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/video-classification-dir-tree

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VideoClassificationDirectoryTree

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a video classification directory tree in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/video-classification-dir-tree

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VideoClassificationDirectoryTree

FiftyOne Image Classification¶

The fiftyone.types.FiftyOneImageClassificationDataset type represents a labeled dataset consisting of images and their associated classification label(s) stored in a simple JSON format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.json

In the simplest case, labels.json can be a JSON file in the following format:

{
    "classes": [
        "<labelA>",
        "<labelB>",
        ...
    ],
    "labels": {
        "<uuid1>": <target>,
        "<uuid2>": <target>,
        ...
    }
}

If the classes field is provided, the target values are class IDs that are mapped to class label strings via classes[target]. If no classes field is provided, then the target values directly store the label strings.

The target value in labels for unlabeled images is None (or missing).

The UUIDs can also be relative paths like path/to/uuid, in which case the images in data/ should be arranged in nested subfolders with the corresponding names, or they can be absolute paths, in which case the images may or may not be in data/.

Alternatively, labels.json can contain predictions with associated confidences and additional attributes in the following format:

{
    "classes": [
        "<labelA>",
        "<labelB>",
        ...
    ],
    "labels": {
        "<uuid1>": {
            "label": <target>,
            "confidence": <optional-confidence>,
            "attributes": {
                <optional-name>: <optional-value>,
                ...
            }
        },
        "<uuid2>": {
            "label": <target>,
            "confidence": <optional-confidence>,
            "attributes": {
                <optional-name>: <optional-value>,
                ...
            }
        },
        ...
    }
}

You can also load multilabel classifications in this format by storing lists of targets in labels.json:

{
    "classes": [
        "<labelA>",
        "<labelB>",
        ...
    ],
    "labels": {
        "<uuid1>": [<target1>, <target2>, ...],
        "<uuid2>": [<target1>, <target2>, ...],
        ...
    }
}

where the target values in labels can be class strings, class IDs, or dicts in the format described above defining class labels, confidences, and optional attributes.

Note

See FiftyOneImageClassificationDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image classification dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/image-classification-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneImageClassificationDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/image-classification-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageClassificationDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view an image classification dataset in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/image-classification-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageClassificationDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.FiftyOneImageClassificationDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.FiftyOneImageClassificationDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the UUIDs in your labels are absolute paths to the source media, then you can omit the data_path parameter from the example above.

TF Image Classification¶

The fiftyone.types.TFImageClassificationDataset type represents a labeled dataset consisting of images and their associated classification labels stored as TFRecords.

Datasets of this type are read in the following format:

<dataset_dir>/
    tf.records-?????-of-?????

where the features of the (possibly sharded) TFRecords are stored in the following format:

{
    # Image dimensions
    "height": tf.io.FixedLenFeature([], tf.int64),
    "width": tf.io.FixedLenFeature([], tf.int64),
    "depth": tf.io.FixedLenFeature([], tf.int64),
    # Image filename
    "filename": tf.io.FixedLenFeature([], tf.int64),
    # The image extension
    "format": tf.io.FixedLenFeature([], tf.string),
    # Encoded image bytes
    "image_bytes": tf.io.FixedLenFeature([], tf.string),
    # Class label string
    "label": tf.io.FixedLenFeature([], tf.string, default_value=""),
}

For unlabeled samples, the TFRecords do not contain label features.

Note

See TFImageClassificationDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image classification dataset stored as a directory of TFRecords in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/tf-image-classification-dataset"
images_dir = "/path/for/images"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.TFImageClassificationDataset,
    images_dir=images_dir,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

When the above command is executed, the images in the TFRecords will be written to the provided images_dir, which is required because FiftyOne datasets must make their images available as individual files on disk.

NAME=my-dataset
DATASET_DIR=/path/to/tf-image-classification-dataset
IMAGES_DIR=/path/for/images

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.TFImageClassificationDataset \
    --kwargs images_dir=$IMAGES_DIR

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

When the above command is executed, the images in the TFRecords will be written to the provided IMAGES_DIR, which is required because FiftyOne datasets must make their images available as individual files on disk.

To view an image classification dataset stored as a directory of TFRecords in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/tf-image-classification-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.TFImageClassificationDataset

Note

You can provide the tf_records_path argument instead of dataset_dir in the examples above to directly specify the path to the TFRecord(s) to load. See TFImageClassificationDatasetImporter for details.

COCO¶

The fiftyone.types.COCODetectionDataset type represents a labeled dataset consisting of images and their associated object detections saved in COCO Object Detection Format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <filename0>.<ext>
        <filename1>.<ext>
        ...
    labels.json

where labels.json is a JSON file in the following format:

{
    "info": {...},
    "licenses": [
        {
            "id": 1,
            "name": "Attribution-NonCommercial-ShareAlike License",
            "url": "http://creativecommons.org/licenses/by-nc-sa/2.0/",
        },
        ...
    ],
    "categories": [
        {
            "id": 1,
            "name": "cat",
            "supercategory": "animal",
            "keypoints": ["nose", "head", ...],
            "skeleton": [[12, 14], [14, 16], ...]
        },
        ...
    ],
    "images": [
        {
            "id": 1,
            "license": 1,
            "file_name": "<filename0>.<ext>",
            "height": 480,
            "width": 640,
            "date_captured": null
        },
        ...
    ],
    "annotations": [
        {
            "id": 1,
            "image_id": 1,
            "category_id": 1,
            "bbox": [260, 177, 231, 199],
            "segmentation": [...],
            "keypoints": [224, 226, 2, ...],
            "num_keypoints": 10,
            "score": 0.95,
            "area": 45969,
            "iscrowd": 0
        },
        ...
    ]
}

See this page for a full specification of the segmentation field.

For unlabeled datasets, labels.json does not contain an annotations field.

The file_name attribute of the labels file encodes the location of the corresponding images, which can be any of the following:

The filename of an image in the data/ folder
A relative path like data/sub/folder/filename.ext specifying the relative path to the image in a nested subfolder of data/
An absolute path to an image, which may or may not be in the data/ folder

Note

See COCODetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a COCO detection dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/coco-detection-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.COCODetectionDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/coco-detection-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.COCODetectionDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a COCO detection dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/coco-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.COCODetectionDataset

Note

By default, all supported label types are loaded (detections, segmentations, and keypoints). However, you can choose specific type(s) to load by passing the optional label_types argument to methods like Dataset.from_dir():

# Only load bounding boxes
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.COCODetectionDataset,
    label_types=["detections"],
    ...
)

See COCODetectionDatasetImporter for complete documentation of the available COCO import options.

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/coco-labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.COCODetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/coco-labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.COCODetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the file_name key of your labels contains absolute paths to the source media, then you can omit the data_path parameter from the example above.

If you have an existing dataset and corresponding model predictions stored in COCO format, then you can use add_coco_labels() to conveniently add the labels to the dataset. The example below demonstrates a round-trip export and then re-import of both images-and-labels and labels-only data in COCO format:

import fiftyone as fo
import fiftyone.zoo as foz
import fiftyone.utils.coco as fouc

dataset = foz.load_zoo_dataset("quickstart")
classes = dataset.distinct("predictions.detections.label")

# Export images and ground truth labels to disk
dataset.export(
    export_dir="/tmp/coco",
    dataset_type=fo.types.COCODetectionDataset,
    label_field="ground_truth",
    classes=classes,
)

# Export predictions
dataset.export(
    dataset_type=fo.types.COCODetectionDataset,
    labels_path="/tmp/coco/predictions.json",
    label_field="predictions",
    classes=classes,
)

# Now load ground truth labels into a new dataset
dataset2 = fo.Dataset.from_dir(
    dataset_dir="/tmp/coco",
    dataset_type=fo.types.COCODetectionDataset,
    label_field="ground_truth",
)

# And add model predictions
fouc.add_coco_labels(
    dataset2,
    "predictions",
    "/tmp/coco/predictions.json",
    classes,
)

# Verify that ground truth and predictions were imported as expected
print(dataset.count("ground_truth.detections"))
print(dataset2.count("ground_truth.detections"))
print(dataset.count("predictions.detections"))
print(dataset2.count("predictions.detections"))

Note

See add_coco_labels() for a complete description of the available syntaxes for loading COCO-formatted predictions to an existing dataset.

VOC¶

The fiftyone.types.VOCDetectionDataset type represents a labeled dataset consisting of images and their associated object detections saved in VOC format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.xml
        <uuid2>.xml
        ...

where the labels XML files are in the following format:

<annotation>
    <folder></folder>
    <filename>image.ext</filename>
    <path>/path/to/dataset-dir/data/image.ext</path>
    <source>
        <database></database>
    </source>
    <size>
        <width>640</width>
        <height>480</height>
        <depth>3</depth>
    </size>
    <segmented></segmented>
    <object>
        <name>cat</name>
        <pose></pose>
        <truncated>0</truncated>
        <difficult>0</difficult>
        <occluded>0</occluded>
        <bndbox>
            <xmin>256</xmin>
            <ymin>200</ymin>
            <xmax>450</xmax>
            <ymax>400</ymax>
        </bndbox>
    </object>
    <object>
        <name>dog</name>
        <pose></pose>
        <truncated>1</truncated>
        <difficult>1</difficult>
        <occluded>1</occluded>
        <bndbox>
            <xmin>128</xmin>
            <ymin>100</ymin>
            <xmax>350</xmax>
            <ymax>300</ymax>
        </bndbox>
    </object>
    ...
</annotation>

where either the <filename> and/or <path> field of the annotations may be populated to specify the corresponding source image.

Unlabeled images have no corresponding file in labels/.

The data/ and labels/ files may contain nested subfolders of parallelly organized images and masks.

Note

See VOCDetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a VOC detection dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/voc-detection-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.VOCDetectionDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/voc-detection-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VOCDetectionDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a VOC detection dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/voc-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.VOCDetectionDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/voc-labels"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.VOCDetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/voc-labels

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.VOCDetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the <path> field of your labels are populated with the absolute paths to the source media, then you can omit the data_path parameter from the example above.

KITTI¶

The fiftyone.types.KITTIDetectionDataset type represents a labeled dataset consisting of images and their associated object detections saved in KITTI format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.txt
        <uuid2>.txt
        ...

where the labels TXT files are space-delimited files where each row corresponds to an object and the 15 (and optional 16th score) columns have the following meanings:

# of columns	Name	Description	Default
1	type	The object label
1	truncated	A float in `[0, 1]`, where 0 is non-truncated and 1 is fully truncated. Here, truncation refers to the object leaving image boundaries	0
1	occluded	An int in `(0, 1, 2, 3)` indicating occlusion state, where:- 0 = fully visible- 1 = partly occluded- 2 = largely occluded- 3 = unknown	0
1	alpha	Observation angle of the object, in `[-pi, pi]`	0
4	bbox	2D bounding box of object in the image in pixels, in the format `[xtl, ytl, xbr, ybr]`
1	dimensions	3D object dimensions, in meters, in the format `[height, width, length]`	0
1	location	3D object location `(x, y, z)` in camera coordinates (in meters)	0
1	rotation_y	Rotation around the y-axis in camera coordinates, in `[-pi, pi]`	0
1	score	`(optional)` A float confidence for the detection

When reading datasets of this type, all columns after the four bbox columns are optional.

Unlabeled images have no corresponding file in labels/.

The data/ and labels/ files may contain nested subfolders of parallelly organized images and masks.

Note

See KITTIDetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a KITTI detection dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/kitti-detection-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.KITTIDetectionDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/kitti-detection-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.KITTIDetectionDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a KITTI detection dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/kitti-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.KITTIDetectionDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/kitti-labels"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.KITTIDetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/kitti-labels

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.KITTIDetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

YOLOv4¶

The fiftyone.types.YOLOv4Dataset type represents a labeled dataset consisting of images and their associated object detections saved in YOLOv4 format.

Datasets of this type are read in the following format:

<dataset_dir>/
    obj.names
    images.txt
    data/
        <uuid1>.<ext>
        <uuid1>.txt
        <uuid2>.<ext>
        <uuid2>.txt
        ...

where obj.names contains the object class labels:

<label-0>
<label-1>
...

and images.txt contains the list of images in data/:

data/<uuid1>.<ext>
data/<uuid2>.<ext>
...

The image paths in images.txt can be specified as either relative (to the location of file) or as absolute paths. Alternatively, this file can be omitted, in which case the data/ directory is listed to determine the available images.

The TXT files in data/ are space-delimited files where each row corresponds to an object in the image of the same name, in one of the following formats:

# Detections
<target> <x-center> <y-center> <width> <height>
<target> <x-center> <y-center> <width> <height> <confidence>

# Polygons
<target> <x1> <y1> <x2> <y2> <x3> <y3> ...

where <target> is the zero-based integer index of the object class label from obj.names, all coordinates are expressed as relative values in [0, 1] x [0, 1], and <confidence> is an optional confidence in [0, 1].

Unlabeled images have no corresponding TXT file in data/.

The data/ folder may contain nested subfolders.

Note

By default, all annotations are loaded as Detections, converting any polylines to tight bounding boxes if necessary. However, you can choose to load YOLO annotations as Polylines by passing the optional label_type argument to methods like Dataset.from_dir():

# Load annotations as polygons
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.YOLOv4Dataset,
    label_type="polylines",
    ...
)

See YOLOv4DatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a YOLOv4 dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/yolov4-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.YOLOv4Dataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/yolov4-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.YOLOv4Dataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a YOLOv4 dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/yolov4-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.YOLOv4Dataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/yolo-labels"
classes = ["list", "of", "classes"]

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.YOLOv4Dataset,
    data_path=data_path,
    labels_path=labels_path,
    classes=classes,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/yolo-labels
OBJECTS_PATH=/path/to/obj.names

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.YOLOv4Dataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH \
        objects_path=$OBJECTS_PATH

If you have an existing dataset and corresponding model predictions stored in YOLO format, then you can use add_yolo_labels() to conveniently add the labels to the dataset.

The example below demonstrates a round-trip export and then re-import of both images-and-labels and labels-only data in YOLO format:

import fiftyone as fo
import fiftyone.zoo as foz
import fiftyone.utils.yolo as fouy

dataset = foz.load_zoo_dataset("quickstart")
classes = dataset.distinct("predictions.detections.label")

# Export images and ground truth labels to disk
dataset.export(
    export_dir="/tmp/yolov4",
    dataset_type=fo.types.YOLOv4Dataset,
    label_field="ground_truth",
    classes=classes,
)

# Export predictions
dataset.export(
    dataset_type=fo.types.YOLOv4Dataset,
    labels_path="/tmp/yolov4/predictions",
    label_field="predictions",
    classes=classes,
)

# Now load ground truth labels into a new dataset
dataset2 = fo.Dataset.from_dir(
    dataset_dir="/tmp/yolov4",
    dataset_type=fo.types.YOLOv4Dataset,
    label_field="ground_truth",
)

# And add model predictions
fouy.add_yolo_labels(
    dataset2,
    "predictions",
    "/tmp/yolov4/predictions",
    classes,
)

# Verify that ground truth and predictions were imported as expected
print(dataset.count("ground_truth.detections"))
print(dataset2.count("ground_truth.detections"))
print(dataset.count("predictions.detections"))
print(dataset2.count("predictions.detections"))

Note

See add_yolo_labels() for a complete description of the available syntaxes for loading YOLO-formatted predictions to an existing dataset.

YOLOv5¶

The fiftyone.types.YOLOv5Dataset type represents a labeled dataset consisting of images and their associated object detections saved in YOLOv5 format.

Datasets of this type are read in the following format:

<dataset_dir>/
    dataset.yaml
    images/
        train/
            <uuid1>.<ext>
            <uuid2>.<ext>
            ...
        val/
            <uuid3>.<ext>
            <uuid4>.<ext>
            ...
    labels/
        train/
            <uuid1>.txt
            <uuid2>.txt
            ...
        val/
            <uuid3>.txt
            <uuid4>.txt
            ...

where dataset.yaml contains the following information:

path: <dataset_dir>  # optional
train: ./images/train/
val: ./images/val/

names:
  0: list
  1: of
  2: classes
  ...

See this page for a full description of the possible format of dataset.yaml. In particular, the dataset may contain one or more splits with arbitrary names, as the specific split being imported or exported is specified by the split argument to fiftyone.utils.yolo.YOLOv5DatasetImporter. Also, dataset.yaml can be located outside of <dataset_dir> as long as the optional path is provided.

Note

Any relative paths in dataset.yaml or per-split TXT files are interpreted relative to the directory containing these files, not your current working directory.

The TXT files in labels/ are space-delimited files where each row corresponds to an object in the image of the same name, in one of the following formats:

# Detections
<target> <x-center> <y-center> <width> <height>
<target> <x-center> <y-center> <width> <height> <confidence>

# Polygons
<target> <x1> <y1> <x2> <y2> <x3> <y3> ...

where <target> is the zero-based integer index of the object class label from names, all coordinates are expressed as relative values in [0, 1] x [0, 1], and <confidence> is an optional confidence in [0, 1].

Unlabeled images have no corresponding TXT file in labels/. The label file path for each image is obtained by replacing images/ with labels/ in the respective image path.

The image and labels directories for a given split may contain nested subfolders of parallelly organized images and labels.

Note

By default, all annotations are loaded as Detections, converting any polylines to tight bounding boxes if necessary. However, you can choose to load YOLO annotations as Polylines by passing the optional label_type argument to methods like Dataset.from_dir():

# Load annotations as polygons
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.YOLOv5Dataset,
    label_type="polylines",
    ...
)

See YOLOv5DatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a YOLOv5 dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/yolov5-dataset"

# The splits to load
splits = ["train", "val"]

# Load the dataset, using tags to mark the samples in each split
dataset = fo.Dataset(name)
for split in splits:
    dataset.add_dir(
        dataset_dir=dataset_dir,
        dataset_type=fo.types.YOLOv5Dataset,
        split=split,
        tags=split,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

If you have an existing dataset and corresponding model predictions stored in YOLO format, then you can use add_yolo_labels() to conveniently add the labels to the dataset.

The example below demonstrates a round-trip export and then re-import of both images-and-labels and labels-only data in YOLO format:

import fiftyone as fo
import fiftyone.zoo as foz
import fiftyone.utils.yolo as fouy

dataset = foz.load_zoo_dataset("quickstart")
classes = dataset.distinct("predictions.detections.label")

# YOLOv5 format supports splits, so let's grab only the `validation` split
view = dataset.match_tags("validation")

# Export images and ground truth labels to disk
view.export(
    export_dir="/tmp/yolov5",
    dataset_type=fo.types.YOLOv5Dataset,
    split="validation",
    label_field="ground_truth",
    classes=classes,
)

# Export predictions
view.export(
    dataset_type=fo.types.YOLOv5Dataset,
    labels_path="/tmp/yolov5/predictions/validation",
    label_field="predictions",
    classes=classes,
)

# Now load ground truth labels into a new dataset
dataset2 = fo.Dataset.from_dir(
    dataset_dir="/tmp/yolov5",
    dataset_type=fo.types.YOLOv5Dataset,
    split="validation",
    label_field="ground_truth",
)

# And add model predictions
fouy.add_yolo_labels(
    dataset2,
    "predictions",
    "/tmp/yolov5/predictions/validation",
    classes,
)

# Verify that ground truth and predictions were imported as expected
print(view.count("ground_truth.detections"))
print(dataset2.count("ground_truth.detections"))
print(view.count("predictions.detections"))
print(dataset2.count("predictions.detections"))

Note

See add_yolo_labels() for a complete description of the available syntaxes for loading YOLO-formatted predictions to an existing dataset.

FiftyOne Object Detection¶

The fiftyone.types.FiftyOneImageDetectionDataset type represents a labeled dataset consisting of images and their associated object detections stored in a simple JSON format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.json

where labels.json is a JSON file in the following format:

{
    "classes": [
        <labelA>,
        <labelB>,
        ...
    ],
    "labels": {
        <uuid1>: [
            {
                "label": <target>,
                "bounding_box": [
                    <top-left-x>, <top-left-y>, <width>, <height>
                ],
                "confidence": <optional-confidence>,
                "attributes": {
                    <optional-name>: <optional-value>,
                    ...
                }
            },
            ...
        ],
        <uuid2>: [
            ...
        ],
        ...
    }
}

and where the bounding box coordinates are expressed as relative values in [0, 1] x [0, 1].

If the classes field is provided, the target values are class IDs that are mapped to class label strings via classes[target]. If no classes field is provided, then the target values directly store the label strings.

The target value in labels for unlabeled images is None (or missing).

The UUIDs can also be relative paths like path/to/uuid, in which case the images in data/ should be arranged in nested subfolders with the corresponding names, or they can be absolute paths, in which case the images may or may not be in data/.

Note

See FiftyOneImageDetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image detection dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/image-detection-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneImageDetectionDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/image-detection-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageDetectionDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view an image detection dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/image-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageDetectionDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.FiftyOneImageDetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.FiftyOneImageDetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the UUIDs in your labels are absolute paths to the source media, then you can omit the data_path parameter from the example above.

FiftyOne Temporal Detection¶

The fiftyone.types.FiftyOneTemporalDetectionDataset type represents a labeled dataset consisting of videos and their associated temporal detections stored in a simple JSON format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.json

where labels.json is a JSON file in the following format:

{
    "classes": [
        "<labelA>",
        "<labelB>",
        ...
    ],
    "labels": {
        "<uuid1>": [
            {
                "label": <target>,
                "support": [<first-frame>, <last-frame>],
                "confidence": <optional-confidence>,
                "attributes": {
                    <optional-name>: <optional-value>,
                    ...
                }
            },
            {
                "label": <target>,
                "support": [<first-frame>, <last-frame>],
                "confidence": <optional-confidence>,
                "attributes": {
                    <optional-name>: <optional-value>,
                    ...
                }
            },
            ...
        ],
        "<uuid2>": [
            {
                "label": <target>,
                "timestamps": [<start-timestamp>, <stop-timestamp>],
                "confidence": <optional-confidence>,
                "attributes": {
                    <optional-name>: <optional-value>,
                    ...
                }
            },
            {
                "label": <target>,
                "timestamps": [<start-timestamp>, <stop-timestamp>],
                "confidence": <optional-confidence>,
                "attributes": {
                    <optional-name>: <optional-value>,
                    ...
                }
            },
        ],
        ...
    }
}

The temporal range of each detection can be specified either via the support key, which should contain the [first, last] frame numbers of the detection, or the timestamps key, which should contain the [start, stop] timestamps of the detection in seconds.

If the classes field is provided, the target values are class IDs that are mapped to class label strings via classes[target]. If no classes field is provided, then the target values directly store the label strings.

Unlabeled videos can have a None (or missing) key in labels.

The UUIDs can also be relative paths like path/to/uuid, in which case the images in data/ should be arranged in nested subfolders with the corresponding names, or they can be absolute paths, in which case the images may or may not be in data/.

Note

See FiftyOneTemporalDetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a temporal detection dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/temporal-detection-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneTemporalDetectionDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/temporal-detection-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneTemporalDetectionDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a temporal detection dataset in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/temporal-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneTemporalDetectionDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.FiftyOneTemporalDetectionDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.FiftyOneTemporalDetectionDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the UUIDs in your labels are absolute paths to the source media, then you can omit the data_path parameter from the example above.

TF Object Detection¶

The fiftyone.types.TFObjectDetectionDataset type represents a labeled dataset consisting of images and their associated object detections stored as TFRecords in TF Object Detection API format.

Datasets of this type are read in the following format:

<dataset_dir>/
    tf.records-?????-of-?????

where the features of the (possibly sharded) TFRecords are stored in the following format:

{
    # Image dimensions
    "image/height": tf.io.FixedLenFeature([], tf.int64),
    "image/width": tf.io.FixedLenFeature([], tf.int64),

    # Image filename is used for both of these when writing
    "image/filename": tf.io.FixedLenFeature([], tf.string),
    "image/source_id": tf.io.FixedLenFeature([], tf.string),

    # Encoded image bytes
    "image/encoded": tf.io.FixedLenFeature([], tf.string),

    # Image format, either `jpeg` or `png`
    "image/format": tf.io.FixedLenFeature([], tf.string),

    # Normalized bounding box coordinates in `[0, 1]`
    "image/object/bbox/xmin": tf.io.FixedLenSequenceFeature(
        [], tf.float32, allow_missing=True
    ),
    "image/object/bbox/xmax": tf.io.FixedLenSequenceFeature(
        [], tf.float32, allow_missing=True
    ),
    "image/object/bbox/ymin": tf.io.FixedLenSequenceFeature(
        [], tf.float32, allow_missing=True
    ),
    "image/object/bbox/ymax": tf.io.FixedLenSequenceFeature(
        [], tf.float32, allow_missing=True
    ),

    # Class label string
    "image/object/class/text": tf.io.FixedLenSequenceFeature(
        [], tf.string, allow_missing=True
    ),

    # Integer class ID
    "image/object/class/label": tf.io.FixedLenSequenceFeature(
        [], tf.int64, allow_missing=True
    ),
}

The TFRecords for unlabeled samples do not contain image/object/* features.

Note

See TFObjectDetectionDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an object detection dataset stored as a directory of TFRecords in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/tf-object-detection-dataset"
images_dir = "/path/for/images"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.TFObjectDetectionDataset,
    images_dir=images_dir,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

When the above command is executed, the images in the TFRecords will be written to the provided images_dir, which is required because FiftyOne datasets must make their images available as individual files on disk.

NAME=my-dataset
DATASET_DIR=/path/to/tf-object-detection-dataset
IMAGES_DIR=/path/for/images

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.TFObjectDetectionDataset \
    --kwargs images_dir=$IMAGES_DIR

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

When the above command is executed, the images in the TFRecords will be written to the provided IMAGES_DIR, which is required because FiftyOne datasets must make their images available as individual files on disk.

To view an object detection dataset stored as a directory of TFRecords in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/tf-object-detection-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.TFObjectDetectionDataset

Note

You can provide the tf_records_path argument instead of dataset_dir in the examples above to directly specify the path to the TFRecord(s) to load. See TFObjectDetectionDatasetImporter for details.

Image Segmentation Directory¶

The fiftyone.types.ImageSegmentationDirectory type represents a labeled dataset consisting of images and their associated semantic segmentations stored as images on disk.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <filename1>.<ext>
        <filename2>.<ext>
        ...
    labels/
        <filename1>.<ext>
        <filename2>.<ext>
        ...

where labels/ contains the semantic segmentations stored as images.

Unlabeled images have no corresponding file in labels/.

The data/ and labels/ files may contain nested subfolders of parallelly organized images and masks.

Note

See ImageSegmentationDirectoryImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image segmentation dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/image-segmentation-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.ImageSegmentationDirectory,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/image-segmentation-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageSegmentationDirectory

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view an image segmentation dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/image-segmentation-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.ImageSegmentationDirectory

You can also independently specify the locations of the masks and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/masks"

# Import dataset by explicitly providing paths to the source media and masks
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.ImageSegmentationDirectory,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/masks

# Import dataset by explicitly providing paths to the source media and masks
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.ImageSegmentationDirectory \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

CVAT Image¶

The fiftyone.types.CVATImageDataset type represents a labeled dataset consisting of images and their associated tags and object detections stored in CVAT image format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.xml

where labels.xml is an XML file in the following format:

<?xml version="1.0" encoding="utf-8"?>
<annotations>
    <version>1.1</version>
    <meta>
        <task>
            <id>0</id>
            <name>task-name</name>
            <size>51</size>
            <mode>annotation</mode>
            <overlap></overlap>
            <bugtracker></bugtracker>
            <flipped>False</flipped>
            <created>2017-11-20 11:51:51.000000+00:00</created>
            <updated>2017-11-20 11:51:51.000000+00:00</updated>
            <labels>
                <label>
                    <name>car</name>
                    <attributes>
                        <attribute>
                            <name>type</name>
                            <values>coupe\\nsedan\\ntruck</values>
                        </attribute>
                        ...
                    </attributes>
                </label>
                <label>
                    <name>traffic_line</name>
                    <attributes>
                        <attribute>
                            <name>color</name>
                            <values>white\\nyellow</values>
                        </attribute>
                        ...
                    </attributes>
                </label>
                ...
            </labels>
        </task>
        <segments>
            <segment>
                <id>0</id>
                <start>0</start>
                <stop>50</stop>
                <url></url>
            </segment>
        </segments>
        <owner>
            <username></username>
            <email></email>
        </owner>
        <dumped>2017-11-20 11:51:51.000000+00:00</dumped>
    </meta>
    <image id="0" name="<uuid1>.<ext>" width="640" height="480">
        <tag label="urban"></tag>
        ...
        <box label="car" xtl="100" ytl="50" xbr="325" ybr="190" occluded="0">
            <attribute name="type">sedan</attribute>
            ...
        </box>
        ...
        <polygon label="car" points="561.30,916.23;561.30,842.77;...;560.20,966.67" occluded="0">
            <attribute name="make">Honda</attribute>
            ...
        </polygon>
        ...
        <polyline label="traffic_line" points="462.10,0.00;126.80,1200.00" occluded="0">
            <attribute name="color">yellow</attribute>
            ...
        </polyline>
        ...
        <points label="wheel" points="574.90,939.48;1170.16,907.90;...;600.16,459.48" occluded="0">
            <attribute name="location">front_driver_side</attribute>
            ...
        </points>
        ...
    </image>
    ...
    <image id="50" name="<uuid51>.<ext>" width="640" height="480">
        ...
    </image>
</annotations>

Unlabeled images have no corresponding image tag in labels.xml.

The name field of the <image> tags in the labels file encodes the location of the corresponding images, which can be any of the following:

The filename of an image in the data/ folder
A relative path like data/sub/folder/filename.ext specifying the relative path to the image in a nested subfolder of data/
An absolute path to an image, which may or may not be in the data/ folder

Note

See CVATImageDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a CVAT image dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/cvat-image-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.CVATImageDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/cvat-image-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CVATImageDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a CVAT image dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/cvat-image-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CVATImageDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/cvat-labels.xml"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.CVATImageDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/cvat-labels.xml

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.CVATImageDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the name key of your labels contains absolute paths to the source media, then you can omit the data_path parameter from the example above.

CVAT Video¶

The fiftyone.types.CVATVideoDataset type represents a labeled dataset consisting of videos and their associated object detections stored in CVAT video format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.xml
        <uuid2>.xml
        ...

where the labels XML files are stored in the following format:

<?xml version="1.0" encoding="utf-8"?>
<annotations>
    <version>1.1</version>
    <meta>
        <task>
            <id>task-id</id>
            <name>task-name</name>
            <size>51</size>
            <mode>interpolation</mode>
            <overlap></overlap>
            <bugtracker></bugtracker>
            <flipped>False</flipped>
            <created>2017-11-20 11:51:51.000000+00:00</created>
            <updated>2017-11-20 11:51:51.000000+00:00</updated>
            <labels>
                <label>
                    <name>car</name>
                    <attributes>
                        <attribute>
                            <name>type</name>
                            <values>coupe\\nsedan\\ntruck</values>
                        </attribute>
                        ...
                    </attributes>
                </label>
                <label>
                    <name>traffic_line</name>
                    <attributes>
                        <attribute>
                            <name>color</name>
                            <values>white\\nyellow</values>
                        </attribute>
                        ...
                    </attributes>
                </label>
                ...
            </labels>
        </task>
        <segments>
            <segment>
                <id>0</id>
                <start>0</start>
                <stop>50</stop>
                <url></url>
            </segment>
        </segments>
        <owner>
            <username></username>
            <email></email>
        </owner>
        <original_size>
            <width>640</width>
            <height>480</height>
        </original_size>
        <dumped>2017-11-20 11:51:51.000000+00:00</dumped>
    </meta>
    <track id="0" label="car">
        <box frame="0" xtl="100" ytl="50" xbr="325" ybr="190" outside="0" occluded="0" keyframe="1">
            <attribute name="type">sedan</attribute>
            ...
        </box>
        ...
    </track>
    <track id="1" label="car">
        <polygon frame="0" points="561.30,916.23;561.30,842.77;...;560.20,966.67" outside="0" occluded="0" keyframe="1">
            <attribute name="make">Honda</attribute>
            ...
        </polygon>
        ...
    </track>
    ...
    <track id="10" label="traffic_line">
        <polyline frame="10" points="462.10,0.00;126.80,1200.00" outside="0" occluded="0" keyframe="1">
            <attribute name="color">yellow</attribute>
            ...
        </polyline>
        ...
    </track>
    ...
    <track id="88" label="wheel">
        <points frame="176" points="574.90,939.48;1170.16,907.90;...;600.16,459.48" outside="0" occluded="0" keyframe="1">
            <attribute name="location">front_driver_side</attribute>
            ...
        </points>
        ...
    </track>
</annotations>

Unlabeled videos have no corresponding file in labels/.

The data/ and labels/ files may contain nested subfolders of parallelly organized images and labels.

Note

See CVATVideoDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a CVAT video dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/cvat-video-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.CVATVideoDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/cvat-video-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CVATVideoDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a CVAT video dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/cvat-video-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CVATVideoDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/cvat-labels"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.CVATVideoDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/cvat-labels

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.CVATVideoDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

OpenLABEL Image¶

The fiftyone.types.OpenLABELImageDataset type represents a labeled dataset consisting of images and their associated multitask predictions stored = in OpenLABEL format.

OpenLABEL is a flexible format which allows labels to be stored in a variety of different ways with respect to the corresponding media files. The following enumerates the possible structures in which media data and OpenLABEL formatted label files can be stored in ways that is understood by FiftyOne:

One label file per image. Each label contains only the metadata and labels associated with the image of the same name. In this case, the labels_path argument is expected to be a directory, if provided:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.json
        <uuid2>.json
        ...

One label file for all images. The label file contains all of the metadata and labels associated with every image. In this case, there needs to be additional information provided in the label file to match labels to images. Specifically, the image filepath corresponding to a label must be stored as a stream:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.json

Multiple label files, each corresponding to one or more images. This case is similar to when there is a single label file, except that the label information may be spread out over multiple files. Since the filenames cannot be used to match labels to images, the image filepaths must again be stored as streams in the labels files:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <labels-filename1>.json
        <labels-filename2>.json
        ...

As for the actual structure of the labels files themselves, labels are stored in one or more JSON files and can follow a variety of formats. In general following this format:

Note

All object information stored in the frames key is applied to the corresponding image.

{
    "openlabel": {
        "metadata": {
            "schema_version": "1.0.0",
            "uri": "/path/to/<uuid>.<ext>",
        },
        "objects": {
            "object_uuid1": {
                "name": "instance1",
                "type": "label1",
                "object_data": {
                    "bbox": [
                        {
                            "name": "shape",
                            "val": [
                                center-x,
                                center-y,
                                width,
                                height
                            ]
                        }
                    ]
                }
            },
            "object_uuid2": {
                "name": "instance1",
                "type": "label2",
                "object_data": {},  # DEFINED IN FRAMES
            }
        },
        "frames": {
            "0": {
               "frame_properties": {
                  "streams": {
                     "Camera1": {
                        "uri": "<uuid>.<ext>"
                     }
                  }
               },
               "objects": {
                  "object_uuid2": {
                     "object_data": {
                        "poly2d": [
                           {
                              "attributes": {
                                 "boolean": [
                                    {
                                       "name": "is_hole",
                                       "val": false
                                    }
                                 ],
                                 "text": [
                                    {  # IF NOT PROVIDED OTHERWISE
                                       "name": "stream",
                                       "val": "Camera1"
                                    }
                                 ]
                              },
                              "closed": true,
                              "mode": "MODE_POLY2D_ABSOLUTE",
                              "name": "polygon_name",
                              "stream": "Camera1",  # IF NOT IN ATTRIBUTES
                              "val": [
                                 point1-x,
                                 point1-y,
                                 point2-x,
                                 point2-y,
                                 ...
                              ]
                           }
                        ]
                     }
                  }
              }
           }
        },
        "streams": {
           "Camera1": {
              "description": "",
              "stream_properties": {
                 "height": 480,
                 "width": 640
              },
              "type": "camera"
           }
        },
        "ontologies": ... # NOT PARSED
        "relations": ... # NOT PARSED
        "resources": ... # NOT PARSED
        "tags": ... # NOT PARSED
    }
}

Note

See OpenLABELImageDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

If loading Keypoints related to a given KeypointSkeleton, then you can provide a skeleton and skeleton_key argument to the OpenLABELImageDatasetImporter allowing you to match points in your annotations file to labels in the KeypointSkeleton and load the points and their attributes in the correct order.

You can create a FiftyOne dataset from a OpenLABEL image dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/openlabel-image-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.OpenLABELImageDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/openlabel-image-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.OpenLABELImageDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a OpenLABEL image dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/openlabel-image-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.OpenLABELImageDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"

labels_path = "/path/to/openlabel-labels.json"
# labels_path = "/path/to/openlabel-labels"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.OpenLABELImageDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images

LABELS_PATH=/path/to/openlabel-labels.json
# LABELS_PATH=/path/to/openlabel-labels

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.OpenLABELImageDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

OpenLABEL is a flexible format that allows for many user-specific decisions about how to represent labels and metadata. If you have OpenLABEL-compliant data in a format not understood by the current importers, please make an issue or contribute a pull request!

OpenLABEL Video¶

The fiftyone.types.OpenLABELVideoDataset type represents a labeled dataset consisting of videos and their associated multitask predictions stored in OpenLABEL format.

OpenLABEL is a flexible format which allows labels to be stored in a variety of different ways with respect to the corresponding media files. The following enumerates the possible structures in which media data and OpenLABEL formatted label files can be stored in ways that is understood by FiftyOne:

One label file per video. Each label contains only the metadata and labels associated with the video of the same name. In this case, the labels_path argument is expected to be a directory, if provided:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.json
        <uuid2>.json
        ...

One label file for all videos. The label file contains all of the metadata and labels associated with every video. In this case, there needs to be additional information provided in the label file to match labels to videos. Specifically, the video filepath corresponding to a label must be stored as a stream:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels.json

Multiple label files, each corresponding to one or more videos. This case is similar to when there is a single label file, except that the label information may be spread out over multiple files. Since the filenames cannot be used to match labels to videos, the video filepaths must again be stored as streams in the labels files:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <labaels-filename1>.json
        <labaels-filename2>.json
        ...

As for the actual structure of the labels files themselves, labels are stored in one or more JSON files and can follow a variety of formats. In general following this format:

{
    "openlabel": {
        "metadata": {
            "schema_version": "1.0.0",
            "uri": "/path/to/<uuid>.<ext>",
        },
        "objects": {
            "object_uuid1": {
                "name": "instance1",
                "type": "label1",
                "object_data": {
                    "bbox": [
                        {
                            "name": "shape",
                            "val": [
                                center-x,
                                center-y,
                                width,
                                height
                            ]
                        }
                    ]
                }
                "frame_intervals": [{"frame_start": 0, "frame_end": 10}],
            },
            "object_uuid2": {
                "name": "instance1",
                "type": "label2",
                "object_data": {},  # DEFINED IN FRAMES
            }
        },
        "frames": {
            "0": {
               "frame_properties": {
                  "streams": {
                     "Camera1": {
                        "uri":"<uuid>.<ext>"
                     }
                  }
               },
               "objects": {
                  "object_uuid2": {
                     "object_data": {
                        "poly2d": [
                           {
                              "attributes": {
                                 "boolean": [
                                    {
                                       "name": "is_hole",
                                       "val": false
                                    }
                                 ],
                                 "text": [
                                    {  # IF NOT PROVIDED OTHERWISE
                                       "name": "stream",
                                       "val": "Camera1"
                                    }
                                 ]
                              },
                              "closed": true,
                              "mode": "MODE_POLY2D_ABSOLUTE",
                              "name": "polygon_name",
                              "stream": "Camera1",  # IF NOT IN ATTRIBUTES
                              "val": [
                                 point1-x,
                                 point1-y,
                                 point2-x,
                                 point2-y,
                                 ...
                              ]
                           }
                        ]
                     }
                  }
              },
              ...
           }
        },
        "streams": {
           "Camera1": {
              "description": "",
              "stream_properties": {
                 "height": 480,
                 "width": 640
              },
              "type": "camera"
           }
        },
        "ontologies": ...  # NOT PARSED
        "relations" ...  # NOT PARSED
        "resources" ...  # NOT PARSED
        "tags": ...  # NOT PARSED
    }
}

Note

See OpenLABELVideoDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

If loading Keypoints related to a given KeypointSkeleton, then you can provide a skeleton and skeleton_key argument to the OpenLABELVideoDatasetImporter allowing you to match points in your annotations file to labels in the KeypointSkeleton and load the points and their attributes in the correct order.

You can create a FiftyOne dataset from a OpenLABEL video dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/openlabel-video-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.OpenLABELVideoDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/openlabel-video-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.OpenLABELVideoDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a OpenLABEL video dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/openlabel-video-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.OpenLABELVideoDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/videos"

labels_path = "/path/to/openlabel-labels.json"
# labels_path = "/path/to/openlabel-labels"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.OpenLABELVideoDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/videos

LABELS_PATH=/path/to/openlabel-labels.json
# LABELS_PATH=/path/to/openlabel-labels

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.OpenLABELVideoDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

OpenLABEL is a flexible format that allows for many user-specific decisions about how to represent labels and metadata. If you have OpenLABEL-compliant data in a format not understood by the current importers, please make an issue or contribute a pull request!

BDD¶

The fiftyone.types.BDDDataset type represents a labeled dataset consisting of images and their associated multitask predictions saved in Berkeley DeepDrive (BDD) format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <filename0>.<ext>
        <filename1>.<ext>
        ...
    labels.json

where labels.json is a JSON file in the following format:

[
    {
        "name": "<filename0>.<ext>",
        "attributes": {
            "scene": "city street",
            "timeofday": "daytime",
            "weather": "overcast"
        },
        "labels": [
            {
                "id": 0,
                "category": "traffic sign",
                "manualAttributes": true,
                "manualShape": true,
                "attributes": {
                    "occluded": false,
                    "trafficLightColor": "none",
                    "truncated": false
                },
                "box2d": {
                    "x1": 1000.698742,
                    "x2": 1040.626872,
                    "y1": 281.992415,
                    "y2": 326.91156
                },
                "score": 0.95
            },
            ...
            {
                "id": 34,
                "category": "drivable area",
                "manualAttributes": true,
                "manualShape": true,
                "attributes": {
                    "areaType": "direct"
                },
                "poly2d": [
                    {
                        "types": "LLLLCCC",
                        "closed": true,
                        "vertices": [
                            [241.143645, 697.923453],
                            [541.525255, 380.564983],
                            ...
                        ]
                    }
                ],
                "score": 0.87
            },
            ...
            {
                "id": 109356,
                "category": "lane",
                "attributes": {
                    "laneDirection": "parallel",
                    "laneStyle": "dashed",
                    "laneType": "single white"
                },
                "manualShape": true,
                "manualAttributes": true,
                "poly2d": [
                    {
                        "types": "LL",
                        "closed": false,
                        "vertices": [
                            [492.879546, 331.939543],
                            [0, 471.076658],
                            ...
                        ]
                    }
                ],
                "score": 0.98
            },
            ...
        }
    }
    ...
]

Unlabeled images have no corresponding entry in labels.json.

The name attribute of the labels file encodes the location of the corresponding images, which can be any of the following:

The filename of an image in the data/ folder
A relative path like data/sub/folder/filename.ext specifying the relative path to the image in a nested subfolder of data/
An absolute path to an image, which may or may not be in the data/ folder

Note

See BDDDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a BDD dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/bdd-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.BDDDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/bdd-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.BDDDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a BDD dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/bdd-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.BDDDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/bdd-labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.BDDDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/bdd-labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.BDDDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the name key of your labels contains absolute paths to the source media, then you can omit the data_path parameter from the example above.

CSV¶

The fiftyone.types.CSVDataset type represents a dataset consisting of images or videos and their associated field values stored as columns of a CSV file.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <filename1>.<ext>
        <filename2>.<ext>
        ...
    labels.csv

where labels.csv is a CSV file in the following format:

field1,field2,field3,...
value1,value2,value3,...
value1,value2,value3,...
...

One sample will be generated per row in the CSV file (excluding the header row).

One column of the CSV file must contain media paths, which may be either:

filenames or relative paths to media files in data/
absolute paths to media files

By default it is assumed that a filepath column exists and contains the media paths, but you can customize this via the optional media_field parameter.

By default all columns are loaded as string fields, but you can provide the optional fields parameter to select a subset of columns to load or provide custom parsing functions for each field, as demonstrated below.

Note

See CSVDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a CSV dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/csv-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.CSVDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/csv-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CSVDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a CSV dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/csv-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.CSVDataset

If your CSV file contains absolute media paths, then you can directly specify the path to the CSV file itself by providing the labels_path parameter.

Additionally, you can use the fields parameter to customize how each field is parsed, as demonstrated below:

import fiftyone as fo

name = "my-dataset"
labels_path = "/path/to/labels.csv"

fields = {
    "filepath": None,  # load as strings
    "tags": lambda v: v.strip("").split(","),
    "float_field": lambda v: float(v),
    "weather": lambda v: fo.Classification(label=v) if v else None,
}

# Import CSV file with absolute media paths and custom field parsers
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.CSVDataset,
    labels_path=labels_path,
    fields=fields,
    name=name,
)

NAME=my-dataset
LABELS_PATH=/path/to/labels.csv

# Import CSV file with absolute media paths
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.CSVDataset \
    --kwargs labels_path=$LABELS_PATH

DICOM¶

The fiftyone.types.DICOMDataset type represents a dataset consisting of images and their associated properties stored in DICOM format.

Note

You must have pydicom<3 installed in order to load DICOM datasets.

The standard format for datasets of this type is the following:

<dataset_dir>/
    <filename1>.dcm
    <filename2>.dcm

where each .dcm file is a DICOM file that can be read via pydicom.dcmread.

Alternatively, rather than providing a dataset_dir, you can provide the dicom_path argument, which can directly specify a glob pattern of DICOM files or the path to a DICOMDIR file.

By default, all attributes in the DICOM files discoverable via pydicom.dataset.Dataset.dir() with supported types are loaded into sample-level fields, but you can select only specific attributes by passing the optional keywords argument.

Note

When importing DICOM datasets, the pixel data are converted to 8-bit images, using the SmallestImagePixelValue and LargestImagePixelValue attributes (if present), to inform the conversion.

The images are written to a backing directory that you can configure by passing the images_dir argument. By default, the images are written to dataset_dir.

Currently, only single frame images are supported, but a community contribution to support 3D or 4D image types (e.g., CT scans) is welcomed!

Note

See DICOMDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a DICOM dataset stored in standard format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/dicom-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.DICOMDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/dicom-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.DICOMDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

You can create a FiftyOne dataset from a glob pattern of DICOM files or the path to a DICOMDIR file as follows:

import fiftyone as fo

name = "my-dataset"

dicom_path = "/path/to/*.dcm"  # glob pattern of DICOM files
# dicom_path = "/path/to/DICOMDIR"  # DICOMDIR file

# Create the dataset
dataset = fo.Dataset.from_dir(
    dicom_path=dicom_path,
    dataset_type=fo.types.DICOMDataset,
    keywords=["PatientName", "StudyID"],  # load specific attributes
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset

DICOM_PATH='/path/to/*.dcm'  # glob pattern of DICOM files
# DICOM_PATH='/path/to/DICOMDIR'  # DICOMDIR file

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.DICOMDataset \
    --kwargs \
        dicom_path=$DICOM_PATH \
        keywords=PatientName,StudyID  # load specific attributes

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

GeoJSON¶

The fiftyone.types.GeoJSONDataset type represents a dataset consisting of images or videos and their associated geolocation data and optional properties stored in GeoJSON format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <filename1>.<ext>
        <filename2>.<ext>
        ...
    labels.json

where labels.json is a GeoJSON file containing a FeatureCollection in the following format:

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -73.99496451958454,
                    40.66338032487842
                ]
            },
            "properties": {
                "filename": <filename1>.<ext>,
                ...
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -73.80992143421788,
                    40.65611832778962
                ]
            },
            "properties": {
                "filename": <filename2>.<ext>,
                ...
            }
        },
        ...
    ]
}

where the geometry field may contain any valid GeoJSON geometry object, and the filename property encodes the name of the corresponding media in the data/ folder. The filename property can also be an absolute path, which may or may not be in the data/ folder.

Samples with no location data will have a null geometry field.

The properties field of each feature can contain additional labels that can be imported.

Note

See GeoJSONDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a GeoJSON dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/geojson-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.GeoJSONDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/geojson-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.GeoJSONDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a GeoJSON dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/geojson-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.GeoJSONDataset

You can also independently specify the locations of the labels and the root directory containing the corresponding media files by providing the labels_path and data_path parameters rather than dataset_dir:

import fiftyone as fo

name = "my-dataset"
data_path = "/path/to/images"
labels_path = "/path/to/geo-labels.json"

# Import dataset by explicitly providing paths to the source media and labels
dataset = fo.Dataset.from_dir(
    dataset_type=fo.types.GeoJSONDataset,
    data_path=data_path,
    labels_path=labels_path,
    name=name,
)

NAME=my-dataset
DATA_PATH=/path/to/images
LABELS_PATH=/path/to/geo-labels.json

# Import dataset by explicitly providing paths to the source media and labels
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.GeoJSONDataset \
    --kwargs \
        data_path=$DATA_PATH \
        labels_path=$LABELS_PATH

Note

If the filename key of your labels contains absolute paths to the source media, then you can omit the data_path parameter from the example above.

GeoTIFF¶

The fiftyone.types.GeoTIFFDataset type represents a dataset consisting of images and their associated geolocation data stored in GeoTIFF format.

Note

You must have rasterio installed in order to load GeoTIFF datasets.

The standard format for datasets of this type is the following:

<dataset_dir>/
    <filename1>.tif
    <filename2>.tif

where each .tif file is a GeoTIFF image that can be read via rasterio.open.

Alternatively, rather than providing a dataset_dir, you can provide the image_path argument, which can directly specify a list or glob pattern of GeoTIFF images to load.

The dataset will contain a GeoLocation field whose point attribute contains the (longitude, latitude) coordinates of each image center and whose polygon attribute contains the (longitude, latitude) coordinates of the corners of the image (clockwise, starting from the top-left corner).

Note

See GeoTIFFDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a GeoTIFF dataset stored in standard format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/geotiff-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.GeoTIFFDataset,
    label_field="location",
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/geotiff-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.GeoTIFFDataset \
    --kwargs label_field=location

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

You can create a FiftyOne dataset from a list or glob pattern of GeoTIFF images as follows:

import fiftyone as fo

name = "my-dataset"
image_path = "/path/to/*.tif"  # glob pattern of GeoTIFF images
# image_path = ["/path/to/image1.tif", ...]  # list of GeoTIFF images

# Create the dataset
dataset = fo.Dataset.from_dir(
    image_path=image_path,
    dataset_type=fo.types.GeoTIFFDataset,
    label_field="location",
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
IMAGE_PATH='/path/to/*.tif'  # glob pattern of GeoTIFF images
# IMAGE_PATH='/path/to/image1.tif,...'  # list of GeoTIFF images

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --type fiftyone.types.GeoTIFFDataset \
    --kwargs \
        image_path=$IMAGE_PATH \
        label_field=location

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

FiftyOne Dataset¶

The fiftyone.types.FiftyOneDataset provides a disk representation of an entire Dataset in a serialized JSON format along with its source media.

Datasets of this type are read in the following format:

<dataset_dir>/
    metadata.json
    samples.json
    data/
        <filename1>.<ext>
        <filename2>.<ext>
        ...
    annotations/
        <anno_key1>.json
        <anno_key2>.json
        ...
    brain/
        <brain_key1>.json
        <brain_key2>.json
        ...
    evaluations/
        <eval_key1>.json
        <eval_key2>.json
        ...

where metadata.json is a JSON file containing metadata associated with the dataset, samples.json is a JSON file containing a serialized representation of the samples in the dataset, annotations/ contains any serialized AnnotationResults, brain/ contains any serialized BrainResults, and evaluations/ contains any serialized EvaluationResults.

The contents of the data/ directory may also be organized in nested subfolders, depending on how the dataset was exported, in which case the filepaths in samples.json should contain correspondingly nested paths.

Video datasets have an additional frames.json file that contains a serialized representation of the frame labels for each video in the dataset.

Note

See FiftyOneDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a directory in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/fiftyone-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/fiftyone-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a dataset stored on disk in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/fiftyone-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneDataset

If you performed a FiftyOneDataset export using the rel_dir parameter to strip a common prefix from the media filepaths in the dataset, then simply include the rel_dir parameter when importing back into FiftyOne to prepend the appropriate prefix to each media path:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/fiftyone-dataset"

# Import dataset, prepending `rel_dir` to each media path
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneDataset,
    rel_dir="/common/images/dir",
    name=name,
)

NAME=my-dataset
DATASET_DIR=/path/to/fiftyone-dataset

# Import dataset, prepending `rel_dir` to each media path
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneDataset \
    --kwargs rel_dir=/common/images/dir

Note

Exporting in FiftyOneDataset format using the export_media=False and rel_dir parameters is a convenient way to transfer datasets between work environments, since this enables you to store the media files wherever you wish in each environment and then simply provide the appropriate rel_dir value as shown above when importing the dataset into FiftyOne in a new environment.

FiftyOne Image Labels¶

The fiftyone.types.FiftyOneImageLabelsDataset type represents a labeled dataset consisting of images and their associated multitask predictions stored in ETA ImageLabels format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.json
        <uuid2>.json
        ...
    manifest.json

where manifest.json is a JSON file in the following format:

{
    "type": "eta.core.datasets.LabeledImageDataset",
    "description": "",
    "index": [
        {
            "data": "data/<uuid1>.<ext>",
            "labels": "labels/<uuid1>.json"
        },
        {
            "data": "data/<uuid2>.<ext>",
            "labels": "labels/<uuid2>.json"
        },
        ...
    ]
}

and where each labels JSON file is stored in ETA ImageLabels format.

For unlabeled images, an empty eta.core.image.ImageLabels file is stored.

Note

See FiftyOneImageLabelsDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from an image labels dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/image-labels-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneImageLabelsDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/image-labels-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageLabelsDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view an image labels dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/image-labels-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneImageLabelsDataset

FiftyOne Video Labels¶

The fiftyone.types.FiftyOneVideoLabelsDataset type represents a labeled dataset consisting of videos and their associated labels stored in ETA VideoLabels format.

Datasets of this type are read in the following format:

<dataset_dir>/
    data/
        <uuid1>.<ext>
        <uuid2>.<ext>
        ...
    labels/
        <uuid1>.json
        <uuid2>.json
        ...
    manifest.json

where manifest.json is a JSON file in the following format:

{
    "type": "eta.core.datasets.LabeledVideoDataset",
    "description": "",
    "index": [
        {
            "data": "data/<uuid1>.<ext>",
            "labels": "labels/<uuid1>.json"
        },
        {
            "data": "data/<uuid2>.<ext>",
            "labels": "labels/<uuid2>.json"
        },
        ...
    ]
}

and where each labels JSON file is stored in ETA VideoLabels format.

For unlabeled videos, an empty eta.core.video.VideoLabels file is written.

Note

See FiftyOneVideoLabelsDatasetImporter for parameters that can be passed to methods like Dataset.from_dir() to customize the import of datasets of this type.

You can create a FiftyOne dataset from a video labels dataset stored in the above format as follows:

import fiftyone as fo

name = "my-dataset"
dataset_dir = "/path/to/video-labels-dataset"

# Create the dataset
dataset = fo.Dataset.from_dir(
    dataset_dir=dataset_dir,
    dataset_type=fo.types.FiftyOneVideoLabelsDataset,
    name=name,
)

# View summary info about the dataset
print(dataset)

# Print the first few samples in the dataset
print(dataset.head())

NAME=my-dataset
DATASET_DIR=/path/to/video-labels-dataset

# Create the dataset
fiftyone datasets create \
    --name $NAME \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneVideoLabelsDataset

# View summary info about the dataset
fiftyone datasets info $NAME

# Print the first few samples in the dataset
fiftyone datasets head $NAME

To view a video labels dataset stored in the above format in the FiftyOne App without creating a persistent FiftyOne dataset, you can execute:

DATASET_DIR=/path/to/video-labels-dataset

# View the dataset in the App
fiftyone app view \
    --dataset-dir $DATASET_DIR \
    --type fiftyone.types.FiftyOneVideoLabelsDataset

Custom formats¶

If your data does not follow one of the previous formats, then the simplest and most flexible approach to loading your data into FiftyOne is to iterate over your data in a loop and add it to a Dataset.

Alternatively, the Dataset class provides a Dataset.from_importer() factory method that can be used to import a dataset using any DatasetImporter instance.

This means that you can define your own DatasetImporter class and then import a dataset from disk in your custom format using the following recipe:

import fiftyone as fo

# Create an instance of your custom dataset importer
importer = CustomDatasetImporter(...)

# Import the dataset
dataset = fo.Dataset.from_importer(importer)

You can also define a custom Dataset type, which enables you to import datasets in your custom format using the Dataset.from_dir() factory method:

import fiftyone as fo

# The `fiftyone.types.Dataset` subclass for your custom dataset
dataset_type = CustomDataset

# Import the dataset
dataset = fo.Dataset.from_dir(dataset_type=dataset_type, ...)

Writing a custom DatasetImporter¶

DatasetImporter is an abstract interface; the concrete interface that you should implement is determined by the type of dataset that you are importing.

To define a custom importer for unlabeled image datasets, implement the UnlabeledImageDatasetImporter interface.

The pseudocode below provides a template for a custom UnlabeledImageDatasetImporter:

import fiftyone.utils.data as foud

class CustomUnlabeledImageDatasetImporter(foud.UnlabeledImageDatasetImporter):
    """Custom importer for unlabeled image datasets.

    Args:
        dataset_dir (None): the dataset directory. This may be optional for
            some importers
        shuffle (False): whether to randomly shuffle the order in which the
            samples are imported
        seed (None): a random seed to use when shuffling
        max_samples (None): a maximum number of samples to import. By default,
            all samples are imported
        **kwargs: additional keyword arguments for your importer
    """

    def __init__(
        self,
        dataset_dir=None,
        shuffle=False,
        seed=None,
        max_samples=None,
        **kwargs,
    ):
        super().__init__(
            dataset_dir=dataset_dir,
            shuffle=shuffle,
            seed=seed,
            max_samples=max_samples
        )
        # Your initialization here

    def __len__(self):
        """The total number of samples that will be imported.

        Raises:
            TypeError: if the total number is not known
        """
        # Return the total number of samples in the dataset (if known)
        pass

    def __next__(self):
        """Returns information about the next sample in the dataset.

        Returns:
            an ``(image_path, image_metadata)`` tuple, where:
            -   ``image_path`` is the path to the image on disk
            -   ``image_metadata`` is an
                :class:`fiftyone.core.metadata.ImageMetadata` instances for the
                image, or ``None`` if :meth:`has_image_metadata` is ``False``

        Raises:
            StopIteration: if there are no more samples to import
        """
        # Implement loading the next sample in your dataset here
        pass

    @property
    def has_dataset_info(self):
        """Whether this importer produces a dataset info dictionary."""
        # Return True or False here
        pass

    @property
    def has_image_metadata(self):
        """Whether this importer produces
        :class:`fiftyone.core.metadata.ImageMetadata` instances for each image.
        """
        # Return True or False here
        pass

    def setup(self):
        """Performs any necessary setup before importing the first sample in
        the dataset.

        This method is called when the importer's context manager interface is
        entered, :func:`DatasetImporter.__enter__`.
        """
        # Your custom setup here
        pass

    def get_dataset_info(self):
        """Returns the dataset info for the dataset.

        By convention, this method should be called after all samples in the
        dataset have been imported.

        Returns:
            a dict of dataset info
        """
        # Return a dict of dataset info, if supported by your importer
        pass

    def close(self, *args):
        """Performs any necessary actions after the last sample has been
        imported.

        This method is called when the importer's context manager interface is
        exited, :func:`DatasetImporter.__exit__`.

        Args:
            *args: the arguments to :func:`DatasetImporter.__exit__`
        """
        # Your custom code here to complete the import
        pass

When Dataset.from_dir() is called with a custom UnlabeledImageDatasetImporter, the import is effectively performed via the pseudocode below:

import fiftyone as fo

dataset = fo.Dataset(...)
importer = CustomUnlabeledImageDatasetImporter(...)

with importer:
    for image_path, image_metadata in importer:
        dataset.add_sample(
            fo.Sample(filepath=image_path, metadata=image_metadata)
        )

    if importer.has_dataset_info:
        info = importer.get_dataset_info()
        parse_info(dataset, info)

Note that the importer is invoked via its context manager interface, which automatically calls the setup() and close() methods of the importer to handle setup/completion of the import.

The images in the dataset are iteratively loaded by invoking the __next__() method of the importer.

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve dataset-level information to store on the FiftyOne dataset. See this section for more information.

The has_image_metadata property of the importer allows it to declare whether it returns ImageMetadata instances for each image that it loads when __next__() is called.

To define a custom importer for labeled image datasets, implement the LabeledImageDatasetImporter interface.

The pseudocode below provides a template for a custom LabeledImageDatasetImporter:

import fiftyone.utils.data as foud

class CustomLabeledImageDatasetImporter(foud.LabeledImageDatasetImporter):
    """Custom importer for labeled image datasets.

    Args:
        dataset_dir (None): the dataset directory. This may be optional for
            some importers
        shuffle (False): whether to randomly shuffle the order in which the
            samples are imported
        seed (None): a random seed to use when shuffling
        max_samples (None): a maximum number of samples to import. By default,
            all samples are imported
        **kwargs: additional keyword arguments for your importer
    """

    def __init__(
        self,
        dataset_dir=None,
        shuffle=False,
        seed=None,
        max_samples=None,
        **kwargs,
    ):
        super().__init__(
            dataset_dir=dataset_dir,
            shuffle=shuffle,
            seed=seed,
            max_samples=max_samples,
        )
        # Your initialization here

    def __len__(self):
        """The total number of samples that will be imported.

        Raises:
            TypeError: if the total number is not known
        """
        # Return the total number of samples in the dataset (if known)
        pass

    def __next__(self):
        """Returns information about the next sample in the dataset.

        Returns:
            an  ``(image_path, image_metadata, label)`` tuple, where

            -   ``image_path``: the path to the image on disk
            -   ``image_metadata``: an
                :class:`fiftyone.core.metadata.ImageMetadata` instances for the
                image, or ``None`` if :meth:`has_image_metadata` is ``False``
            -   ``label``: an instance of :meth:`label_cls`, or a dictionary
                mapping field names to :class:`fiftyone.core.labels.Label`
                instances, or ``None`` if the sample is unlabeled

        Raises:
            StopIteration: if there are no more samples to import
        """
        # Implement loading the next sample in your dataset here
        pass

    @property
    def has_dataset_info(self):
        """Whether this importer produces a dataset info dictionary."""
        # Return True or False here
        pass

    @property
    def has_image_metadata(self):
        """Whether this importer produces
        :class:`fiftyone.core.metadata.ImageMetadata` instances for each image.
        """
        # Return True or False here
        pass

    @property
    def label_cls(self):
        """The :class:`fiftyone.core.labels.Label` class(es) returned by this
        importer.

        This can be any of the following:

        -   a :class:`fiftyone.core.labels.Label` class. In this case, the
            importer is guaranteed to return labels of this type
        -   a list or tuple of :class:`fiftyone.core.labels.Label` classes. In
            this case, the importer can produce a single label field of any of
            these types
        -   a dict mapping keys to :class:`fiftyone.core.labels.Label` classes.
            In this case, the importer will return label dictionaries with keys
            and value-types specified by this dictionary. Not all keys need be
            present in the imported labels
        -   ``None``. In this case, the importer makes no guarantees about the
            labels that it may return
        """
        # Return the appropriate value here
        pass

    def setup(self):
        """Performs any necessary setup before importing the first sample in
        the dataset.

        This method is called when the importer's context manager interface is
        entered, :func:`DatasetImporter.__enter__`.
        """
        # Your custom setup here
        pass

    def get_dataset_info(self):
        """Returns the dataset info for the dataset.

        By convention, this method should be called after all samples in the
        dataset have been imported.

        Returns:
            a dict of dataset info
        """
        # Return a dict of dataset info, if supported by your importer
        pass

    def close(self, *args):
        """Performs any necessary actions after the last sample has been
        imported.

        This method is called when the importer's context manager interface is
        exited, :func:`DatasetImporter.__exit__`.

        Args:
            *args: the arguments to :func:`DatasetImporter.__exit__`
        """
        # Your custom code here to complete the import
        pass

When Dataset.from_dir() is called with a custom LabeledImageDatasetImporter, the import is effectively performed via the pseudocode below:

import fiftyone as fo

dataset = fo.Dataset(...)
importer = CustomLabeledImageDatasetImporter(...)
label_field = ...

if isinstance(label_field, dict):
    label_key = lambda k: label_field.get(k, k)
elif label_field is not None:
    label_key = lambda k: label_field + "_" + k
else:
    label_field = "ground_truth"
    label_key = lambda k: k

with importer:
    for image_path, image_metadata, label in importer:
        sample = fo.Sample(filepath=image_path, metadata=image_metadata)

        if isinstance(label, dict):
            sample.update_fields({label_key(k): v for k, v in label.items()})
        elif label is not None:
            sample[label_field] = label

        dataset.add_sample(sample)

    if importer.has_dataset_info:
        info = importer.get_dataset_info()
        parse_info(dataset, info)

Note that the importer is invoked via its context manager interface, which automatically calls the setup() and close() methods of the importer to handle setup/completion of the import.

The images and their corresponding Label instances in the dataset are iteratively loaded by invoking the __next__() method of the importer.

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve dataset-level information to store on the FiftyOne dataset. See this section for more information.

The label_cls property of the importer declares the type of label(s) that the importer will produce.

The has_image_metadata property of the importer allows it to declare whether it returns ImageMetadata instances for each image that it loads when __next__() is called.

To define a custom importer for unlabeled video datasets, implement the UnlabeledVideoDatasetImporter interface.

The pseudocode below provides a template for a custom UnlabeledVideoDatasetImporter:

import fiftyone.utils.data as foud

class CustomUnlabeledVideoDatasetImporter(foud.UnlabeledVideoDatasetImporter):
    """Custom importer for unlabeled video datasets.

    Args:
        dataset_dir (None): the dataset directory. This may be optional for
            some importers
        shuffle (False): whether to randomly shuffle the order in which the
            samples are imported
        seed (None): a random seed to use when shuffling
        max_samples (None): a maximum number of samples to import. By default,
            all samples are imported
        **kwargs: additional keyword arguments for your importer
    """

    def __init__(
        self,
        dataset_dir=None,
        shuffle=False,
        seed=None,
        max_samples=None,
        **kwargs,
    ):
        super().__init__(
            dataset_dir=dataset_dir,
            shuffle=shuffle,
            seed=seed,
            max_samples=max_samples,
        )
        # Your initialization here

    def __len__(self):
        """The total number of samples that will be imported.

        Raises:
            TypeError: if the total number is not known
        """
        # Return the total number of samples in the dataset (if known)
        pass

    def __next__(self):
        """Returns information about the next sample in the dataset.

        Returns:
            an ``(video_path, video_metadata)`` tuple, where:
            -   ``video_path`` is the path to the video on disk
            -   ``video_metadata`` is an
                :class:`fiftyone.core.metadata.VideoMetadata` instances for the
                video, or ``None`` if :meth:`has_video_metadata` is ``False``

        Raises:
            StopIteration: if there are no more samples to import
        """
        # Implement loading the next sample in your dataset here
        pass

    @property
    def has_dataset_info(self):
        """Whether this importer produces a dataset info dictionary."""
        # Return True or False here
        pass

    @property
    def has_video_metadata(self):
        """Whether this importer produces
        :class:`fiftyone.core.metadata.VideoMetadata` instances for each video.
        """
        # Return True or False here
        pass

    def setup(self):
        """Performs any necessary setup before importing the first sample in
        the dataset.

        This method is called when the importer's context manager interface is
        entered, :func:`DatasetImporter.__enter__`.
        """
        # Your custom setup here
        pass

    def get_dataset_info(self):
        """Returns the dataset info for the dataset.

        By convention, this method should be called after all samples in the
        dataset have been imported.

        Returns:
            a dict of dataset info
        """
        # Return a dict of dataset info, if supported by your importer
        pass

    def close(self, *args):
        """Performs any necessary actions after the last sample has been
        imported.

        This method is called when the importer's context manager interface is
        exited, :func:`DatasetImporter.__exit__`.

        Args:
            *args: the arguments to :func:`DatasetImporter.__exit__`
        """
        # Your custom code here to complete the import
        pass

When Dataset.from_dir() is called with a custom UnlabeledVideoDatasetImporter, the import is effectively performed via the pseudocode below:

import fiftyone as fo

dataset = fo.Dataset(...)
importer = CustomUnlabeledVideoDatasetImporter(...)

with importer:
    for video_path, video_metadata in importer:
        dataset.add_sample(
            fo.Sample(filepath=video_path, metadata=video_metadata)
        )

    if importer.has_dataset_info:
        info = importer.get_dataset_info()
        parse_info(dataset, info)

Note that the importer is invoked via its context manager interface, which automatically calls the setup() and close() methods of the importer to handle setup/completion of the import.

The videos in the dataset are iteratively loaded by invoking the __next__() method of the importer.

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve dataset-level information to store on the FiftyOne dataset. See this section for more information.

The has_video_metadata property of the importer allows it to declare whether it returns VideoMetadata instances for each video that it loads when __next__() is called.

To define a custom importer for labeled video datasets, implement the LabeledVideoDatasetImporter interface.

The pseudocode below provides a template for a custom LabeledVideoDatasetImporter:

import fiftyone.utils.data as foud

class CustomLabeledVideoDatasetImporter(foud.LabeledVideoDatasetImporter):
    """Custom importer for labeled video datasets.

    Args:
        dataset_dir (None): the dataset directory. This may be optional for
            some importers
        shuffle (False): whether to randomly shuffle the order in which the
            samples are imported
        seed (None): a random seed to use when shuffling
        max_samples (None): a maximum number of samples to import. By default,
            all samples are imported
        **kwargs: additional keyword arguments for your importer
    """

    def __init__(
        self,
        dataset_dir=None,
        shuffle=False,
        seed=None,
        max_samples=None,
        **kwargs,
    ):
        super().__init__(
            dataset_dir=dataset_dir,
            shuffle=shuffle,
            seed=seed,
            max_samples=max_samples,
        )
        # Your initialization here

    def __len__(self):
        """The total number of samples that will be imported.

        Raises:
            TypeError: if the total number is not known
        """
        # Return the total number of samples in the dataset (if known)
        pass

    def __next__(self):
    """Returns information about the next sample in the dataset.

        Returns:
            an  ``(video_path, video_metadata, labels, frames)`` tuple, where

            -   ``video_path``: the path to the video on disk
            -   ``video_metadata``: an
                :class:`fiftyone.core.metadata.VideoMetadata` instances for the
                video, or ``None`` if :meth:`has_video_metadata` is ``False``
            -   ``labels``: sample-level labels for the video, which can be any
                of the following::

                -   a :class:`fiftyone.core.labels.Label` instance
                -   a dictionary mapping label fields to
                    :class:`fiftyone.core.labels.Label` instances
                -   ``None`` if the sample has no sample-level labels

            -   ``frames``: frame-level labels for the video, which can
                be any of the following::

                -   a dictionary mapping frame numbers to dictionaries that
                    map label fields to :class:`fiftyone.core.labels.Label`
                    instances for each video frame
                -   ``None`` if the sample has no frame-level labels

        Raises:
            StopIteration: if there are no more samples to import
        """
        # Implement loading the next sample in your dataset here
        pass

    @property
    def has_dataset_info(self):
        """Whether this importer produces a dataset info dictionary."""
        # Return True or False here
        pass

    @property
    def has_video_metadata(self):
        """Whether this importer produces
        :class:`fiftyone.core.metadata.VideoMetadata` instances for each video.
        """
        # Return True or False here
        pass

    @property
    def label_cls(self):
        """The :class:`fiftyone.core.labels.Label` class(es) returned by this
        importer within the sample-level labels that it produces.

        This can be any of the following:

        -   a :class:`fiftyone.core.labels.Label` class. In this case, the
            importer is guaranteed to return sample-level labels of this type
        -   a list or tuple of :class:`fiftyone.core.labels.Label` classes. In
            this case, the importer can produce a single sample-level label
            field of any of these types
        -   a dict mapping keys to :class:`fiftyone.core.labels.Label` classes.
            In this case, the importer will return sample-level label
            dictionaries with keys and value-types specified by this
            dictionary. Not all keys need be present in the imported labels
        -   ``None``. In this case, the importer makes no guarantees about the
            sample-level labels that it may return
        """
        # Return the appropriate value here
        pass

    @property
    def frame_label_cls(self):
        """The :class:`fiftyone.core.labels.Label` class(es) returned by this
        importer within the frame labels that it produces.

        This can be any of the following:

        -   a :class:`fiftyone.core.labels.Label` class. In this case, the
            importer is guaranteed to return frame labels of this type
        -   a list or tuple of :class:`fiftyone.core.labels.Label` classes. In
            this case, the importer can produce a single frame label field of
            any of these types
        -   a dict mapping keys to :class:`fiftyone.core.labels.Label` classes.
            In this case, the importer will return frame label dictionaries
            with keys and value-types specified by this dictionary. Not all
            keys need be present in each frame
        -   ``None``. In this case, the importer makes no guarantees about the
            frame labels that it may return
        """
        # Return the appropriate value here
        pass

    def setup(self):
        """Performs any necessary setup before importing the first sample in
        the dataset.

        This method is called when the importer's context manager interface is
        entered, :func:`DatasetImporter.__enter__`.
        """
        # Your custom setup here
        pass

    def get_dataset_info(self):
        """Returns the dataset info for the dataset.

        By convention, this method should be called after all samples in the
        dataset have been imported.

        Returns:
            a dict of dataset info
        """
        # Return a dict of dataset info, if supported by your importer
        pass

    def close(self, *args):
        """Performs any necessary actions after the last sample has been
        imported.

        This method is called when the importer's context manager interface is
        exited, :func:`DatasetImporter.__exit__`.

        Args:
            *args: the arguments to :func:`DatasetImporter.__exit__`
        """
        # Your custom code here to complete the import
        pass

When Dataset.from_dir() is called with a custom LabeledVideoDatasetImporter, the import is effectively performed via the pseudocode below:

import fiftyone as fo

dataset = fo.Dataset(...)
importer = CustomLabeledVideoDatasetImporter(...)
label_field = ...

if isinstance(label_field, dict):
    label_key = lambda k: label_field.get(k, k)
elif label_field is not None:
    label_key = lambda k: label_field + "_" + k
else:
    label_field = "ground_truth"
    label_key = lambda k: k

with importer:
    for video_path, video_metadata, label, frames in importer:
        sample = fo.Sample(filepath=video_path, metadata=video_metadata)

        if isinstance(label, dict):
            sample.update_fields({label_key(k): v for k, v in label.items()})
        elif label is not None:
            sample[label_field] = label

        if frames is not None:
            frame_labels = {}

            for frame_number, _label in frames.items():
                if isinstance(_label, dict):
                    frame_labels[frame_number] = {
                        label_key(k): v for k, v in _label.items()
                    }
                elif _label is not None:
                    frame_labels[frame_number] = {label_field: _label}

            sample.frames.merge(frame_labels)

        dataset.add_sample(sample)

    if importer.has_dataset_info:
        info = importer.get_dataset_info()
        parse_info(dataset, info)

Note that the importer is invoked via its context manager interface, which automatically calls the setup() and close() methods of the importer to handle setup/completion of the import.

The videos and their corresponding labels in the dataset are iteratively loaded by invoking the __next__() method of the importer. In particular, sample-level labels for the video may be returned in a label value (which may contain a single Label value or a dictionary that maps field names to labels), and frame-level labels may be returned in a frames dictionary that maps frame numbers to dictionaries of field names and labels.

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve dataset-level information to store on the FiftyOne dataset. See this section for more information.

The label_cls property of the importer declares the type of sample-level label(s) that the importer will produce (if any), and the frame_labels_cls property of the importer declares the type of frame-level label(s) that the importer will produce (if any).

The has_video_metadata property of the importer allows it to declare whether it returns VideoMetadata instances for each video that it loads when __next__() is called.

To define a custom importer for grouped datasets, implement the GroupDatasetImporter interface.

The pseudocode below provides a template for a custom GroupDatasetImporter:

import fiftyone.utils.data as foud

class CustomGroupDatasetImporter(foud.GroupDatasetImporter):
    """Custom importer for grouped datasets.

    Args:
        dataset_dir (None): the dataset directory. This may be optional for
            some importers
        shuffle (False): whether to randomly shuffle the order in which the
            samples are imported
        seed (None): a random seed to use when shuffling
        max_samples (None): a maximum number of samples to import. By default,
            all samples are imported
        **kwargs: additional keyword arguments for your importer
    """

    def __init__(
        self,
        dataset_dir=None,
        shuffle=False,
        seed=None,
        max_samples=None,
        **kwargs,
    ):
        super().__init__(
            dataset_dir=dataset_dir,
            shuffle=shuffle,
            seed=seed,
            max_samples=max_samples
        )
        # Your initialization here

    def __len__(self):
        """The total number of samples that will be imported across all group
        slices.

        Raises:
            TypeError: if the total number is not known
        """
        # Return the total number of samples in the dataset (if known)
        pass

    def __next__(self):
        """Returns information about the next group in the dataset.

        Returns:
            a dict mapping slice names to :class:`fiftyone.core.sample.Sample`
            instances

        Raises:
            StopIteration: if there are no more groups to import
        """
        # Implement loading the next group in your dataset here
        pass

    @property
    def has_dataset_info(self):
        """Whether this importer produces a dataset info dictionary."""
        # Return True or False here
        pass

    @property
    def has_sample_field_schema(self):
        """Whether this importer produces a sample field schema."""
        # Return True or False here
        pass

    @property
    def group_field(self):
        """The name of the group field to populate on each sample."""
        # This is the default, but you can customize if desired
        return "group"

    def setup(self):
        """Performs any necessary setup before importing the first sample in
        the dataset.

        This method is called when the importer's context manager interface is
        entered, :func:`DatasetImporter.__enter__`.
        """
        # Your custom setup here
        pass

    def get_dataset_info(self):
        """Returns the dataset info for the dataset.

        By convention, this method should be called after all samples in the
        dataset have been imported.

        Returns:
            a dict of dataset info
        """
        # Return a dict of dataset info, if supported by your importer
        pass

    def get_sample_field_schema(self):
        """Returns a dictionary describing the field schema of the samples
        loaded by this importer.

        Returns:
            a dict mapping field names to :class:`fiftyone.core.fields.Field`
            instances or ``str(field)`` representations of them
        """
        # Return the sample schema here, if known
        pass

    def get_group_media_types(self):
        """Returns a dictionary describing the group slices of the samples
        loaded by this importer.

        Returns:
            a dict mapping slice names to media types
        """
        # Return the group media types here, if known
        pass

    def close(self, *args):
        """Performs any necessary actions after the last sample has been
        imported.

        This method is called when the importer's context manager interface is
        exited, :func:`DatasetImporter.__exit__`.

        Args:
            *args: the arguments to :func:`DatasetImporter.__exit__`
        """
        # Your custom code here to complete the import
        pass

When Dataset.from_dir() is called with a custom GroupDatasetImporter, the import is effectively performed via the pseudocode below:

import fiftyone as fo

dataset = fo.Dataset(...)
importer = CustomGroupDatasetImporter(...)
group_field = importer.group_field

with importer:
    for group in importer:
        _group = fo.Group()
        for name, sample in group.items():
            sample[group_field] = _group.element(name)
            dataset.add_sample(sample)

    if importer.has_dataset_info:
        info = importer.get_dataset_info()
        parse_info(dataset, info)

Note that the importer is invoked via its context manager interface, which automatically calls the setup() and close() methods of the importer to handle setup/completion of the import.

The groups in the dataset are iteratively loaded by invoking the __next__() method of the importer.

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve dataset-level information to store on the FiftyOne dataset. See this section for more information.

The group_field property of the importer allows it to declare the name of the field in which to store the Group information for each sample.

Importing dataset-level information¶

The has_dataset_info property of the importer allows it to declare whether its get_dataset_info() method should be called after all samples have been imported to retrieve a dict of dataset-level information to store in the info property of the dataset.

As a special case, if the info dict contains any of the keys listed below, these items are popped and stored in the corresponding dedicated dataset field:

"classes" key: Dataset.classes
"default_classes" key: Dataset.default_classes
"mask_targets" key: Dataset.mask_targets
"default_mask_targets" key: Dataset.default_mask_targets
"skeletons" key: Dataset.skeletons
"default_skeleton" key: Dataset.default_skeleton
"app_config" key: Dataset.app_config

Writing a custom Dataset type¶

FiftyOne provides the Dataset type system so that dataset formats can be conveniently referenced by their type when reading/writing datasets on disk.

The primary function of the Dataset subclasses is to define the DatasetImporter that should be used to read instances of the dataset from disk and the DatasetExporter that should be used to write instances of the dataset to disk.

See this page for more information about defining custom DatasetExporter classes.

Custom dataset types can be declared by implementing the Dataset subclass corresponding to the type of dataset that you are working with.

The pseudocode below provides a template for a custom UnlabeledImageDataset subclass:

import fiftyone.types as fot

class CustomUnlabeledImageDataset(fot.UnlabeledImageDataset):
    """Custom unlabeled image dataset type."""

    def get_dataset_importer_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.importers.UnlabeledImageDatasetImporter`
        class for importing datasets of this type from disk.

        Returns:
            a :class:`fiftyone.utils.data.importers.UnlabeledImageDatasetImporter`
            class
        """
        # Return your custom UnlabeledImageDatasetImporter class here
        pass

    def get_dataset_exporter_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.exporters.UnlabeledImageDatasetExporter`
        class for exporting datasets of this type to disk.

        Returns:
            a :class:`fiftyone.utils.data.exporters.UnlabeledImageDatasetExporter`
            class
        """
        # Return your custom UnlabeledImageDatasetExporter class here
        pass

Note that, as this type represents an unlabeled image dataset, its importer must be a subclass of UnlabeledImageDatasetImporter, and its exporter must be a subclass of UnlabeledImageDatasetExporter.

The pseudocode below provides a template for a custom LabeledImageDataset subclass:

import fiftyone.types as fot

class CustomLabeledImageDataset(fot.LabeledImageDataset):
    """Custom labeled image dataset type."""

    def get_dataset_importer_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.importers.LabeledImageDatasetImporter`
        class for importing datasets of this type from disk.

        Returns:
            a :class:`fiftyone.utils.data.importers.LabeledImageDatasetImporter`
            class
        """
        # Return your custom LabeledImageDatasetImporter class here
        pass

    def get_dataset_exporter_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.exporters.LabeledImageDatasetExporter`
        class for exporting datasets of this type to disk.

        Returns:
            a :class:`fiftyone.utils.data.exporters.LabeledImageDatasetExporter`
            class
        """
        # Return your custom LabeledImageDatasetExporter class here
        pass

Note that, as this type represents a labeled image dataset, its importer must be a subclass of LabeledImageDatasetImporter, and its exporter must be a subclass of LabeledImageDatasetExporter.

The pseudocode below provides a template for a custom UnlabeledVideoDataset subclass:

import fiftyone.types as fot

class CustomUnlabeledVideoDataset(fot.UnlabeledVideoDataset):
    """Custom unlabeled video dataset type."""

    def get_dataset_importer_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.importers.UnlabeledVideoDatasetImporter`
        class for importing datasets of this type from disk.

        Returns:
            a :class:`fiftyone.utils.data.importers.UnlabeledVideoDatasetImporter`
            class
        """
        # Return your custom UnlabeledVideoDatasetImporter class here
        pass

    def get_dataset_exporter_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.exporters.UnlabeledVideoDatasetExporter`
        class for exporting datasets of this type to disk.

        Returns:
            a :class:`fiftyone.utils.data.exporters.UnlabeledVideoDatasetExporter`
            class
        """
        # Return your custom UnlabeledVideoDatasetExporter class here
        pass

Note that, as this type represents an unlabeled video dataset, its importer must be a subclass of UnlabeledVideoDatasetImporter, and its exporter must be a subclass of UnlabeledVideoDatasetExporter.

The pseudocode below provides a template for a custom LabeledVideoDataset subclass:

import fiftyone.types as fot

class CustomLabeledVideoDataset(fot.LabeledVideoDataset):
    """Custom labeled video dataset type."""

    def get_dataset_importer_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.importers.LabeledVideoDatasetImporter`
        class for importing datasets of this type from disk.

        Returns:
            a :class:`fiftyone.utils.data.importers.LabeledVideoDatasetImporter`
            class
        """
        # Return your custom LabeledVideoDatasetImporter class here
        pass

    def get_dataset_exporter_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.exporters.LabeledVideoDatasetExporter`
        class for exporting datasets of this type to disk.

        Returns:
            a :class:`fiftyone.utils.data.exporters.LabeledVideoDatasetExporter`
            class
        """
        # Return your custom LabeledVideoDatasetExporter class here
        pass

Note that, as this type represents a labeled video dataset, its importer must be a subclass of LabeledVideoDatasetImporter, and its exporter must be a subclass of LabeledVideoDatasetExporter.

The pseudocode below provides a template for a custom GroupDataset subclass:

import fiftyone.types as fot

class CustomGroupDataset(fot.GroupDataset):
    """Custom grouped dataset type."""

    def get_dataset_importer_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.importers.GroupDatasetImporter`
        class for importing datasets of this type from disk.

        Returns:
            a :class:`fiftyone.utils.data.importers.GroupDatasetImporter`
            class
        """
        # Return your custom GroupDatasetImporter class here
        pass

    def get_dataset_exporter_cls(self):
        """Returns the
        :class:`fiftyone.utils.data.exporters.GroupDatasetExporter`
        class for exporting datasets of this type to disk.

        Returns:
            a :class:`fiftyone.utils.data.exporters.GroupDatasetExporter`
            class
        """
        # Return your custom GroupDatasetExporter class here
        pass

Note that, as this type represents a grouped dataset, its importer must be a subclass of GroupDatasetImporter, and its exporter must be a subclass of GroupDatasetExporter.