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Cityscapes Dataset Extraction (Follow-up PR to #1066) #1068

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Jul 1, 2019
Merged

Cityscapes Dataset Extraction (Follow-up PR to #1066) #1068

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16 changes: 7 additions & 9 deletions torchvision/datasets/cityscapes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
from collections import namedtuple
import zipfile

from .utils import extract_archive
from .vision import VisionDataset
from PIL import Image

Expand Down Expand Up @@ -126,16 +127,19 @@ def __init__(self, root, split='train', mode='fine', target_type='instance',
' or "color"')

if not os.path.isdir(self.images_dir) or not os.path.isdir(self.targets_dir):
image_dir_zip = os.path.join(self.root, 'leftImg8bit') + '_trainvaltest.zip'
if split == 'train_extra':
image_dir_zip = os.path.join(self.root, 'leftImg8bit') + '_trainextra.zip'
else:
image_dir_zip = os.path.join(self.root, 'leftImg8bit') + '_trainvaltest.zip'

if self.mode == 'gtFine':
target_dir_zip = os.path.join(self.root, self.mode) + '_trainvaltest.zip'
elif self.mode == 'gtCoarse':
target_dir_zip = os.path.join(self.root, self.mode)

if os.path.isfile(image_dir_zip) and os.path.isfile(target_dir_zip):
extract_cityscapes_zip(zip_location=image_dir_zip, root=self.root)
extract_cityscapes_zip(zip_location=target_dir_zip, root=self.root)
extract_archive(from_path=image_dir_zip, to_path=self.root)
extract_archive(from_path=target_dir_zip, to_path=self.root)
else:
raise RuntimeError('Dataset not found or incomplete. Please make sure all required folders for the'
' specified "split" and "mode" are inside the "root" directory')
Expand Down Expand Up @@ -201,9 +205,3 @@ def _get_target_suffix(self, mode, target_type):
return '{}_color.png'.format(mode)
else:
return '{}_polygons.json'.format(mode)


def extract_cityscapes_zip(zip_location, root):
zip_file = zipfile.ZipFile(zip_location, 'r')
zip_file.extractall(root)
zip_file.close()