fiftyone.utils.caltech#

Utilities for working with the Caltech 101 <https://data.caltech.edu/records/mzrjq-6wc02> and Caltech 256 <https://data.caltech.edu/records/nyy15-4j048> datasets.

Copyright 2017-2025, Voxel51, Inc.
voxel51.com

Functions:

download_caltech101_dataset(dataset_dir[, ...])

Downloads the Caltech 101 dataset.

download_caltech256_dataset(dataset_dir[, ...])

Downloads the Caltech 256 dataset.
fiftyone.utils.caltech.download_caltech101_dataset(dataset_dir, scratch_dir=None)#

Downloads the Caltech 101 dataset.

See this page for the format in which dataset_dir will be arranged.

Parameters:

  • dataset_dir – the directory in which to construct the dataset

  • scratch_dir (None) – a scratch directory to use to download any necessary temporary files

Returns:

  • num_samples: the total number of downloaded images

  • classes: the list of all classes

  • did_download: whether any content was downloaded (True) or if all necessary files were already downloaded (False)

Return type:

a tuple of

fiftyone.utils.caltech.download_caltech256_dataset(dataset_dir, scratch_dir=None)#

Downloads the Caltech 256 dataset.

See this page for the format in which dataset_dir will be arranged.

Parameters:

  • dataset_dir – the directory in which to construct the dataset

  • scratch_dir (None) – a scratch directory to use to download any necessary temporary files

Returns:

  • num_samples: the total number of downloaded images

  • classes: the list of all classes

  • did_download: whether any content was downloaded (True) or if all necessary files were already downloaded (False)

Return type:

a tuple of