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Fix broken download URLs for Caltech101 and Caltech256 datasets #9098

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Fix broken download URLs for Caltech101 and Caltech256 datasets #9098

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6cc4c3b
Fix caltech256 download link (#9097)
JonasKlotz Jun 4, 2025
e48d450
Fix caltech101 download method (#9097)
JonasKlotz Jun 4, 2025
f934fb7
Merge branch 'main' into main
JonasKlotz Jun 16, 2025
d416472
Merge branch 'main' into main
JonasKlotz Jul 9, 2025
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43 changes: 30 additions & 13 deletions torchvision/datasets/caltech.py
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Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
import os
import os.path
import shutil
from pathlib import Path
from typing import Any, Callable, Optional, Union

from PIL import Image

from .utils import download_and_extract_archive, verify_str_arg
from .utils import download_and_extract_archive, extract_archive, verify_str_arg
from .vision import VisionDataset


Expand Down Expand Up @@ -131,19 +132,36 @@ def __len__(self) -> int:
def download(self) -> None:
if self._check_integrity():
return

# Download and unzip the single ZIP containing both .tar files
download_and_extract_archive(
"https://drive.google.com/file/d/137RyRjvTBkBiIfeYBNZBtViDHQ6_Ewsp",
"https://data.caltech.edu/records/mzrjq-6wc02/files/caltech-101.zip?download=1",
self.root,
filename="101_ObjectCategories.tar.gz",
md5="b224c7392d521a49829488ab0f1120d9",
)
download_and_extract_archive(
"https://drive.google.com/file/d/175kQy3UsZ0wUEHZjqkUDdNVssr7bgh_m",
self.root,
filename="Annotations.tar",
md5="6f83eeb1f24d99cab4eb377263132c91",
filename="caltech-101.zip",
md5="3138e1922a9193bfa496528edbbc45d0",
)
archive_folder = os.path.join(self.root, "caltech-101")
category_archive = os.path.join(archive_folder, "101_ObjectCategories.tar.gz")
annotation_archive = os.path.join(archive_folder, "Annotations.tar")
macos_meta = os.path.join(archive_folder, "__MACOSX")

# Remove macOS metadata folder if it exists
if os.path.isdir(macos_meta):
shutil.rmtree(macos_meta)

# Extract '101_ObjectCategories.tar.gz' into self.root
extract_archive(category_archive, self.root, remove_finished=True)

# Extract 'Annotations.tar' into self.root
extract_archive(annotation_archive, self.root, remove_finished=True)

# Delete the 'caltech-101' folder (which may now be empty or contain only other hidden files)
if os.path.isdir(archive_folder):
shutil.rmtree(archive_folder)

# Remove the ZIP file itself
zip_path = os.path.join(self.root, "caltech-101.zip")
if os.path.isfile(zip_path):
os.remove(zip_path)

def extra_repr(self) -> str:
return "Target type: {target_type}".format(**self.__dict__)
Expand Down Expand Up @@ -231,9 +249,8 @@ def __len__(self) -> int:
def download(self) -> None:
if self._check_integrity():
return

download_and_extract_archive(
"https://drive.google.com/file/d/1r6o0pSROcV1_VwT4oSjA2FBUSCWGuxLK",
"https://data.caltech.edu/records/nyy15-4j048/files/256_ObjectCategories.tar",
self.root,
filename="256_ObjectCategories.tar",
md5="67b4f42ca05d46448c6bb8ecd2220f6d",
Expand Down