def _iter_imgs_unordered(images_spec):
if '*' in images_spec:
matches = glob.glob(images_spec)
_, ext = os.path.splitext(images_spec)
if not ext:
matches = (p for p in matches if has_image_ext(p))
elif not has_image_ext(images_spec):
raise ValueError(
'Unrecognized extension {} in glob ({})'.format(
ext, images_spec))
if not matches:
raise ValueError('No matches for glob {}'.format(images_spec))
yield from matches
return
if has_image_ext(images_spec):
yield from [images_spec]
return
# At this point, images_spec should be a path to a directory
if not os.path.isdir(images_spec):
raise NotADirectoryError(images_spec)
print('Recursively traversing {}...'.format(images_spec))
for root, _, fnames in os.walk(images_spec, followlinks=True):
for fname in fnames:
if has_image_ext(fname):
p = os.path.join(root, fname)
if os.path.getsize(p) == 0:
print('WARN / 0 bytes /', p)
continue
yield p
def __init__(self,
root_dir_or_img,
max_imgs=None,
skip_hidden=False,
append_id=None):
"""
:param root_dir_or_img: Either a directory with images or the path of a single image.
:param max_imgs: If given, subsample deterministically to only contain max_imgs
:param skip_hidden: If given, skip images starting with '.'
:param append_id: If given, append `append_id` to self.id
:raises ValueError if root_dir is not a directory or does not contain images
"""
self.root_dir_or_img = root_dir_or_img
if os.path.isdir(root_dir_or_img):
root_dir = root_dir_or_img
self.name = os.path.basename(root_dir.rstrip('/'))
self.ps = sorted(p for p in os_ext.listdir_paths(root_dir)
if has_image_ext(p))
if skip_hidden:
self.ps = self._filter_hidden(self.ps)
if max_imgs and max_imgs < len(self.ps):
print('Subsampling to use {} imgs of {}...'.format(
max_imgs, self.name))
idxs = np.linspace(0, len(self.ps) - 1, max_imgs, dtype=np.int)
self.ps = np.array(self.ps)[idxs].tolist()
assert len(self.ps) == max_imgs
assert_exc(
len(self.ps) > 0, 'No images found in {}'.format(root_dir),
ValueError)
self.id = '{}_{}'.format(self.name, len(self.ps))
self._str = 'Testset({}): in {}, {} images'.format(
self.name, root_dir, len(self.ps))
else:
img = root_dir_or_img
assert_exc(os.path.isfile(img), 'Does not exist: {}'.format(img),
FileNotFoundError)
self.name = os.path.basename(img)
self.ps = [img]
self.id = img
self._str = 'Testset([{}]): 1 image'.format(self.name)
if append_id:
self.id += append_id
