243 lines
8.7 KiB
Python
243 lines
8.7 KiB
Python
import os
|
|
import os.path
|
|
from pathlib import Path
|
|
from typing import Any, Callable, List, Optional, Tuple, Union
|
|
|
|
from PIL import Image
|
|
|
|
from .utils import download_and_extract_archive, verify_str_arg
|
|
from .vision import VisionDataset
|
|
|
|
|
|
class Caltech101(VisionDataset):
|
|
"""`Caltech 101 <https://data.caltech.edu/records/20086>`_ Dataset.
|
|
|
|
.. warning::
|
|
|
|
This class needs `scipy <https://docs.scipy.org/doc/>`_ to load target files from `.mat` format.
|
|
|
|
Args:
|
|
root (str or ``pathlib.Path``): Root directory of dataset where directory
|
|
``caltech101`` exists or will be saved to if download is set to True.
|
|
target_type (string or list, optional): Type of target to use, ``category`` or
|
|
``annotation``. Can also be a list to output a tuple with all specified
|
|
target types. ``category`` represents the target class, and
|
|
``annotation`` is a list of points from a hand-generated outline.
|
|
Defaults to ``category``.
|
|
transform (callable, optional): A function/transform that takes in a PIL image
|
|
and returns a transformed version. E.g, ``transforms.RandomCrop``
|
|
target_transform (callable, optional): A function/transform that takes in the
|
|
target and transforms it.
|
|
download (bool, optional): If true, downloads the dataset from the internet and
|
|
puts it in root directory. If dataset is already downloaded, it is not
|
|
downloaded again.
|
|
|
|
.. warning::
|
|
|
|
To download the dataset `gdown <https://github.com/wkentaro/gdown>`_ is required.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
root: Union[str, Path],
|
|
target_type: Union[List[str], str] = "category",
|
|
transform: Optional[Callable] = None,
|
|
target_transform: Optional[Callable] = None,
|
|
download: bool = False,
|
|
) -> None:
|
|
super().__init__(os.path.join(root, "caltech101"), transform=transform, target_transform=target_transform)
|
|
os.makedirs(self.root, exist_ok=True)
|
|
if isinstance(target_type, str):
|
|
target_type = [target_type]
|
|
self.target_type = [verify_str_arg(t, "target_type", ("category", "annotation")) for t in target_type]
|
|
|
|
if download:
|
|
self.download()
|
|
|
|
if not self._check_integrity():
|
|
raise RuntimeError("Dataset not found or corrupted. You can use download=True to download it")
|
|
|
|
self.categories = sorted(os.listdir(os.path.join(self.root, "101_ObjectCategories")))
|
|
self.categories.remove("BACKGROUND_Google") # this is not a real class
|
|
|
|
# For some reason, the category names in "101_ObjectCategories" and
|
|
# "Annotations" do not always match. This is a manual map between the
|
|
# two. Defaults to using same name, since most names are fine.
|
|
name_map = {
|
|
"Faces": "Faces_2",
|
|
"Faces_easy": "Faces_3",
|
|
"Motorbikes": "Motorbikes_16",
|
|
"airplanes": "Airplanes_Side_2",
|
|
}
|
|
self.annotation_categories = list(map(lambda x: name_map[x] if x in name_map else x, self.categories))
|
|
|
|
self.index: List[int] = []
|
|
self.y = []
|
|
for (i, c) in enumerate(self.categories):
|
|
n = len(os.listdir(os.path.join(self.root, "101_ObjectCategories", c)))
|
|
self.index.extend(range(1, n + 1))
|
|
self.y.extend(n * [i])
|
|
|
|
def __getitem__(self, index: int) -> Tuple[Any, Any]:
|
|
"""
|
|
Args:
|
|
index (int): Index
|
|
|
|
Returns:
|
|
tuple: (image, target) where the type of target specified by target_type.
|
|
"""
|
|
import scipy.io
|
|
|
|
img = Image.open(
|
|
os.path.join(
|
|
self.root,
|
|
"101_ObjectCategories",
|
|
self.categories[self.y[index]],
|
|
f"image_{self.index[index]:04d}.jpg",
|
|
)
|
|
)
|
|
|
|
target: Any = []
|
|
for t in self.target_type:
|
|
if t == "category":
|
|
target.append(self.y[index])
|
|
elif t == "annotation":
|
|
data = scipy.io.loadmat(
|
|
os.path.join(
|
|
self.root,
|
|
"Annotations",
|
|
self.annotation_categories[self.y[index]],
|
|
f"annotation_{self.index[index]:04d}.mat",
|
|
)
|
|
)
|
|
target.append(data["obj_contour"])
|
|
target = tuple(target) if len(target) > 1 else target[0]
|
|
|
|
if self.transform is not None:
|
|
img = self.transform(img)
|
|
|
|
if self.target_transform is not None:
|
|
target = self.target_transform(target)
|
|
|
|
return img, target
|
|
|
|
def _check_integrity(self) -> bool:
|
|
# can be more robust and check hash of files
|
|
return os.path.exists(os.path.join(self.root, "101_ObjectCategories"))
|
|
|
|
def __len__(self) -> int:
|
|
return len(self.index)
|
|
|
|
def download(self) -> None:
|
|
if self._check_integrity():
|
|
print("Files already downloaded and verified")
|
|
return
|
|
|
|
download_and_extract_archive(
|
|
"https://drive.google.com/file/d/137RyRjvTBkBiIfeYBNZBtViDHQ6_Ewsp",
|
|
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",
|
|
)
|
|
|
|
def extra_repr(self) -> str:
|
|
return "Target type: {target_type}".format(**self.__dict__)
|
|
|
|
|
|
class Caltech256(VisionDataset):
|
|
"""`Caltech 256 <https://data.caltech.edu/records/20087>`_ Dataset.
|
|
|
|
Args:
|
|
root (str or ``pathlib.Path``): Root directory of dataset where directory
|
|
``caltech256`` exists or will be saved to if download is set to True.
|
|
transform (callable, optional): A function/transform that takes in a PIL image
|
|
and returns a transformed version. E.g, ``transforms.RandomCrop``
|
|
target_transform (callable, optional): A function/transform that takes in the
|
|
target and transforms it.
|
|
download (bool, optional): If true, downloads the dataset from the internet and
|
|
puts it in root directory. If dataset is already downloaded, it is not
|
|
downloaded again.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
root: str,
|
|
transform: Optional[Callable] = None,
|
|
target_transform: Optional[Callable] = None,
|
|
download: bool = False,
|
|
) -> None:
|
|
super().__init__(os.path.join(root, "caltech256"), transform=transform, target_transform=target_transform)
|
|
os.makedirs(self.root, exist_ok=True)
|
|
|
|
if download:
|
|
self.download()
|
|
|
|
if not self._check_integrity():
|
|
raise RuntimeError("Dataset not found or corrupted. You can use download=True to download it")
|
|
|
|
self.categories = sorted(os.listdir(os.path.join(self.root, "256_ObjectCategories")))
|
|
self.index: List[int] = []
|
|
self.y = []
|
|
for (i, c) in enumerate(self.categories):
|
|
n = len(
|
|
[
|
|
item
|
|
for item in os.listdir(os.path.join(self.root, "256_ObjectCategories", c))
|
|
if item.endswith(".jpg")
|
|
]
|
|
)
|
|
self.index.extend(range(1, n + 1))
|
|
self.y.extend(n * [i])
|
|
|
|
def __getitem__(self, index: int) -> Tuple[Any, Any]:
|
|
"""
|
|
Args:
|
|
index (int): Index
|
|
|
|
Returns:
|
|
tuple: (image, target) where target is index of the target class.
|
|
"""
|
|
img = Image.open(
|
|
os.path.join(
|
|
self.root,
|
|
"256_ObjectCategories",
|
|
self.categories[self.y[index]],
|
|
f"{self.y[index] + 1:03d}_{self.index[index]:04d}.jpg",
|
|
)
|
|
)
|
|
|
|
target = self.y[index]
|
|
|
|
if self.transform is not None:
|
|
img = self.transform(img)
|
|
|
|
if self.target_transform is not None:
|
|
target = self.target_transform(target)
|
|
|
|
return img, target
|
|
|
|
def _check_integrity(self) -> bool:
|
|
# can be more robust and check hash of files
|
|
return os.path.exists(os.path.join(self.root, "256_ObjectCategories"))
|
|
|
|
def __len__(self) -> int:
|
|
return len(self.index)
|
|
|
|
def download(self) -> None:
|
|
if self._check_integrity():
|
|
print("Files already downloaded and verified")
|
|
return
|
|
|
|
download_and_extract_archive(
|
|
"https://drive.google.com/file/d/1r6o0pSROcV1_VwT4oSjA2FBUSCWGuxLK",
|
|
self.root,
|
|
filename="256_ObjectCategories.tar",
|
|
md5="67b4f42ca05d46448c6bb8ecd2220f6d",
|
|
)
|