Module earthvision.datasets.cowc
Cars Overhead with Context Dataset.
Expand source code
"""Cars Overhead with Context Dataset."""
from PIL import Image
import os
import shutil
import posixpath
import tarfile
import numpy as np
import pandas as pd
from typing import Any, Callable, Optional, Tuple
from .vision import VisionDataset
from .utils import _urlretrieve, _load_img
from ..constants.COWC.config import file_mapping_counting, file_mapping_detection
class COWC(VisionDataset):
"""Cars Overhead with Context.
https://gdo152.llnl.gov/cowc/
Args:
root (string): Root directory of dataset.
train (bool, optional): If True, creates dataset from training set, otherwise
creates from test set.
task_mode (string): There is 2 task mode i.e. 'counting' and 'detection'. Default value is 'counting'.
transform (callable, optional): A function/transform that takes in an 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.
"""
mirrors = "https://gdo152.llnl.gov/cowc/download"
resources = "cowc-everything.txz"
def __init__(
self,
root: str,
train: bool = True,
task_mode: str = "counting",
transform: Optional[Callable] = None,
target_transform: Optional[Callable] = None,
download: bool = False,
) -> None:
super(COWC, self).__init__(root, transform=transform, target_transform=target_transform)
self.root = root
self.train = train
self.task_mode = task_mode
if download and self._check_exists():
print("file already exists.")
if download and not self._check_exists():
self.download()
self.extract_file()
if self.task_mode == "counting":
self.task_path = os.path.join(self.root, "cowc/datasets/patch_sets/counting")
self.file_mapping = file_mapping_counting
elif self.task_mode == "detection":
self.task_path = os.path.join(self.root, "cowc/datasets/patch_sets/detection")
self.file_mapping = file_mapping_detection
else:
raise ValueError("task_mode not recognized.")
for filename, compressed in self.file_mapping.items():
if not self._check_exists_subfile(filename):
self.extract_subfile(filename, compressed)
self.img_labels = self.get_path_and_label()
def __getitem__(self, idx: int) -> Tuple[Any, Any]:
"""
Args:
idx (int): Index
Returns:
tuple: (img, target) where target is index of the target class.
"""
img_path = self.img_labels.iloc[idx, 0]
target = self.img_labels.iloc[idx, 1]
folder = img_path.split("/", 1)[0]
img_path = os.path.join(self.task_path, folder, img_path)
img = np.array(_load_img(img_path))
if self.transform is not None:
img = Image.fromarray(img)
img = self.transform(img)
if self.target_transform is not None:
target = Image.fromarray(target)
target = self.target_transform(target)
return img, target
def __len__(self) -> int:
return len(self.img_labels)
def get_path_and_label(self):
"""Return dataframe type consist of image path
and corresponding label."""
if self.task_mode == "counting":
if self.train:
label_name = "COWC_train_list_64_class.txt.bz2"
else:
label_name = "COWC_test_list_64_class.txt.bz2"
elif self.task_mode == "detection":
if self.train:
label_name = "COWC_train_list_detection.txt.bz2"
else:
label_name = "COWC_test_list_detection.txt.bz2"
else:
raise ValueError("task_mode not recognized.")
label_path = os.path.join(self.task_path, label_name)
df = pd.read_csv(label_path, sep=" ", header=None)
return df
def _check_exists_subfile(self, filename):
path_to_check = os.path.join(self.task_path, filename)
return os.path.exists(path_to_check)
def extract_subfile(self, filename, compressed):
comp_path = os.path.join(self.task_path, compressed)
file_path = os.path.join(self.task_path, filename)
tar = tarfile.open(comp_path)
tar.extractall(file_path)
tar.close()
def _check_exists(self):
return os.path.exists(os.path.join(self.root, "cowc"))
def download(self) -> None:
"""download file."""
file_url = posixpath.join(self.mirrors, self.resources)
_urlretrieve(file_url, os.path.join(self.root, self.resources))
def extract_file(self) -> None:
"""Extract file from compressed."""
shutil.unpack_archive(os.path.join(self.root, self.resources), self.root)
os.remove(os.path.join(self.root, self.resources))
Classes
class COWC (root: str, train: bool = True, task_mode: str = 'counting', transform: Optional[Callable] = None, target_transform: Optional[Callable] = None, download: bool = False)
-
Cars Overhead with Context.
Args
root
:string
- Root directory of dataset.
train
:bool
, optional- If True, creates dataset from training set, otherwise creates from test set.
task_mode
:string
- There is 2 task mode i.e. 'counting' and 'detection'. Default value is 'counting'.
transform
:callable
, optional- A function/transform that takes in an 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.
Expand source code
class COWC(VisionDataset): """Cars Overhead with Context. https://gdo152.llnl.gov/cowc/ Args: root (string): Root directory of dataset. train (bool, optional): If True, creates dataset from training set, otherwise creates from test set. task_mode (string): There is 2 task mode i.e. 'counting' and 'detection'. Default value is 'counting'. transform (callable, optional): A function/transform that takes in an 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. """ mirrors = "https://gdo152.llnl.gov/cowc/download" resources = "cowc-everything.txz" def __init__( self, root: str, train: bool = True, task_mode: str = "counting", transform: Optional[Callable] = None, target_transform: Optional[Callable] = None, download: bool = False, ) -> None: super(COWC, self).__init__(root, transform=transform, target_transform=target_transform) self.root = root self.train = train self.task_mode = task_mode if download and self._check_exists(): print("file already exists.") if download and not self._check_exists(): self.download() self.extract_file() if self.task_mode == "counting": self.task_path = os.path.join(self.root, "cowc/datasets/patch_sets/counting") self.file_mapping = file_mapping_counting elif self.task_mode == "detection": self.task_path = os.path.join(self.root, "cowc/datasets/patch_sets/detection") self.file_mapping = file_mapping_detection else: raise ValueError("task_mode not recognized.") for filename, compressed in self.file_mapping.items(): if not self._check_exists_subfile(filename): self.extract_subfile(filename, compressed) self.img_labels = self.get_path_and_label() def __getitem__(self, idx: int) -> Tuple[Any, Any]: """ Args: idx (int): Index Returns: tuple: (img, target) where target is index of the target class. """ img_path = self.img_labels.iloc[idx, 0] target = self.img_labels.iloc[idx, 1] folder = img_path.split("/", 1)[0] img_path = os.path.join(self.task_path, folder, img_path) img = np.array(_load_img(img_path)) if self.transform is not None: img = Image.fromarray(img) img = self.transform(img) if self.target_transform is not None: target = Image.fromarray(target) target = self.target_transform(target) return img, target def __len__(self) -> int: return len(self.img_labels) def get_path_and_label(self): """Return dataframe type consist of image path and corresponding label.""" if self.task_mode == "counting": if self.train: label_name = "COWC_train_list_64_class.txt.bz2" else: label_name = "COWC_test_list_64_class.txt.bz2" elif self.task_mode == "detection": if self.train: label_name = "COWC_train_list_detection.txt.bz2" else: label_name = "COWC_test_list_detection.txt.bz2" else: raise ValueError("task_mode not recognized.") label_path = os.path.join(self.task_path, label_name) df = pd.read_csv(label_path, sep=" ", header=None) return df def _check_exists_subfile(self, filename): path_to_check = os.path.join(self.task_path, filename) return os.path.exists(path_to_check) def extract_subfile(self, filename, compressed): comp_path = os.path.join(self.task_path, compressed) file_path = os.path.join(self.task_path, filename) tar = tarfile.open(comp_path) tar.extractall(file_path) tar.close() def _check_exists(self): return os.path.exists(os.path.join(self.root, "cowc")) def download(self) -> None: """download file.""" file_url = posixpath.join(self.mirrors, self.resources) _urlretrieve(file_url, os.path.join(self.root, self.resources)) def extract_file(self) -> None: """Extract file from compressed.""" shutil.unpack_archive(os.path.join(self.root, self.resources), self.root) os.remove(os.path.join(self.root, self.resources))
Ancestors
- VisionDataset
- torch.utils.data.dataset.Dataset
- typing.Generic
Class variables
var functions : Dict[str, Callable]
var mirrors
var resources
Methods
def download(self) ‑> None
-
download file.
Expand source code
def download(self) -> None: """download file.""" file_url = posixpath.join(self.mirrors, self.resources) _urlretrieve(file_url, os.path.join(self.root, self.resources))
def extract_file(self) ‑> None
-
Extract file from compressed.
Expand source code
def extract_file(self) -> None: """Extract file from compressed.""" shutil.unpack_archive(os.path.join(self.root, self.resources), self.root) os.remove(os.path.join(self.root, self.resources))
def extract_subfile(self, filename, compressed)
-
Expand source code
def extract_subfile(self, filename, compressed): comp_path = os.path.join(self.task_path, compressed) file_path = os.path.join(self.task_path, filename) tar = tarfile.open(comp_path) tar.extractall(file_path) tar.close()
def get_path_and_label(self)
-
Return dataframe type consist of image path and corresponding label.
Expand source code
def get_path_and_label(self): """Return dataframe type consist of image path and corresponding label.""" if self.task_mode == "counting": if self.train: label_name = "COWC_train_list_64_class.txt.bz2" else: label_name = "COWC_test_list_64_class.txt.bz2" elif self.task_mode == "detection": if self.train: label_name = "COWC_train_list_detection.txt.bz2" else: label_name = "COWC_test_list_detection.txt.bz2" else: raise ValueError("task_mode not recognized.") label_path = os.path.join(self.task_path, label_name) df = pd.read_csv(label_path, sep=" ", header=None) return df