class YTVOSDataset:
def __init__(self, img_folder, ann_file, transforms, return_masks,
num_frames):
self.img_folder = img_folder
self.ann_file = ann_file
self._transforms = transforms
self.return_masks = return_masks
self.num_frames = num_frames
self.prepare = ConvertCocoPolysToMask(return_masks)
self.ytvos = YTVOS(ann_file)
self.cat_ids = self.ytvos.getCatIds()
self.vid_ids = self.ytvos.getVidIds()
self.vid_infos = []
for i in self.vid_ids:
info = self.ytvos.loadVids([i])[0]
info['filenames'] = info['file_names']
self.vid_infos.append(info)
self.img_ids = []
for idx, vid_info in enumerate(self.vid_infos):
for frame_id in range(len(vid_info['filenames'])):
self.img_ids.append((idx, frame_id))
def __len__(self):
return len(self.img_ids)
def __getitem__(self, idx):
vid, frame_id = self.img_ids[idx]
vid_id = self.vid_infos[vid]['id']
img = []
vid_len = len(self.vid_infos[vid]['file_names'])
inds = list(range(self.num_frames))
inds = [i % vid_len for i in inds][::-1]
# if random
# random.shuffle(inds)
for j in range(self.num_frames):
img_path = os.path.join(
str(self.img_folder),
self.vid_infos[vid]['file_names'][frame_id - inds[j]])
img.append(Image.open(img_path).convert('RGB'))
ann_ids = self.ytvos.getAnnIds(vidIds=[vid_id])
target = self.ytvos.loadAnns(ann_ids)
target = {
'image_id': idx,
'video_id': vid,
'frame_id': frame_id,
'annotations': target
}
target = self.prepare(img[0], target, inds, self.num_frames)
if self._transforms is not None:
img, target = self._transforms(img, target)
return torch.cat(img, dim=0), target
class YTVOSDatasetTASUF(CustomDataset):
CLASSES = ('person', 'giant_panda', 'lizard', 'parrot', 'skateboard',
'sedan', 'ape', 'dog', 'snake', 'monkey', 'hand', 'rabbit',
'duck', 'cat', 'cow', 'fish', 'train', 'horse', 'turtle',
'bear', 'motorbike', 'giraffe', 'leopard', 'fox', 'deer', 'owl',
'surfboard', 'airplane', 'truck', 'zebra', 'tiger', 'elephant',
'snowboard', 'boat', 'shark', 'mouse', 'frog', 'eagle',
'earless_seal', 'tennis_racket')
def __init__(self,
ann_file,
img_prefix,
img_scale,
img_norm_cfg,
size_divisor=None,
proposal_file=None,
num_max_proposals=1000,
flip_ratio=0,
with_mask=True,
with_crowd=True,
with_label=True,
with_track=False,
extra_aug=None,
aug_ref_bbox_param=None,
resize_keep_ratio=True,
test_mode=False):
self.max_gap = 3
# prefix of images path
self.img_prefix = img_prefix
# load annotations (and proposals)
self.vid_infos = self.load_annotations(ann_file)
img_ids = []
for idx, vid_info in enumerate(self.vid_infos):
for frame_id in range(len(vid_info['filenames'])):
img_ids.append((idx, frame_id))
self.img_ids = img_ids
if proposal_file is not None:
self.proposals = self.load_proposals(proposal_file)
else:
self.proposals = None
# filter images with no annotation during training
if not test_mode:
valid_inds = [
i for i, (v, f) in enumerate(self.img_ids)
if len(self.get_ann_info(v, f)['bboxes'])
]
self.img_ids = [self.img_ids[i] for i in valid_inds]
# (long_edge, short_edge) or [(long1, short1), (long2, short2), ...]
self.img_scales = img_scale if isinstance(img_scale,
list) else [img_scale]
assert mmcv.is_list_of(self.img_scales, tuple)
# normalization configs
self.img_norm_cfg = img_norm_cfg
# max proposals per image
self.num_max_proposals = num_max_proposals
# flip ratio
self.flip_ratio = flip_ratio
assert flip_ratio >= 0 and flip_ratio <= 1
# padding border to ensure the image size can be divided by
# size_divisor (used for FPN)
self.size_divisor = size_divisor
# with mask or not (reserved field, takes no effect)
self.with_mask = with_mask
# some datasets provide bbox annotations as ignore/crowd/difficult,
# if `with_crowd` is True, then these info is returned.
self.with_crowd = with_crowd
# with label is False for RPN
self.with_label = with_label
self.with_track = with_track
# params for augmenting bbox in the reference frame
self.aug_ref_bbox_param = aug_ref_bbox_param
# in test mode or not
self.test_mode = test_mode
# set group flag for the sampler
if not self.test_mode:
self._set_group_flag()
# transforms
self.img_transform = ImageTransform(size_divisor=self.size_divisor,
**self.img_norm_cfg)
self.bbox_transform = BboxTransform()
self.mask_transform = MaskTransform()
self.numpy2tensor = Numpy2Tensor()
# if use extra augmentation
if extra_aug is not None:
self.extra_aug = ExtraAugmentation(**extra_aug)
else:
self.extra_aug = None
# image rescale if keep ratio
self.resize_keep_ratio = resize_keep_ratio
# [JH]
self.max_bboxes_per_frame = 0
def __len__(self):
return len(self.img_ids)
def __getitem__(self, idx):
if self.test_mode:
return self.prepare_test_img(self.img_ids[idx])
data = self.prepare_train_img(self.img_ids[idx])
while data == None:
try:
data = self.prepare_train_img(self.img_ids[idx + 1])
except:
data = self.prepare_train_img(self.img_ids[idx - 1])
return data
def load_annotations(self, ann_file):
self.ytvos = YTVOS(ann_file)
self.cat_ids = self.ytvos.getCatIds()
self.cat2label = {
cat_id: i + 1
for i, cat_id in enumerate(self.cat_ids)
}
self.vid_ids = self.ytvos.getVidIds()
vid_infos = []
for i in self.vid_ids:
info = self.ytvos.loadVids([i])[0]
info['filenames'] = info['file_names']
vid_infos.append(info)
return vid_infos
def get_ann_info(self, idx, frame_id):
vid_id = self.vid_infos[idx]['id']
ann_ids = self.ytvos.getAnnIds(vidIds=[vid_id])
ann_info = self.ytvos.loadAnns(ann_ids)
return self._parse_ann_info(ann_info, frame_id)
def _set_group_flag(self):
"""Set flag according to image aspect ratio.
Images with aspect ratio greater than 1 will be set as group 1,
otherwise group 0.
"""
self.flag = np.zeros(len(self), dtype=np.uint8)
for i in range(len(self)):
vid_id, _ = self.img_ids[i]
vid_info = self.vid_infos[vid_id]
if vid_info['width'] / vid_info['height'] > 1:
self.flag[i] = 1
def bbox_aug(self, bbox, img_size):
assert self.aug_ref_bbox_param is not None
center_off = self.aug_ref_bbox_param[0]
size_perturb = self.aug_ref_bbox_param[1]
n_bb = bbox.shape[0]
# bbox center offset
center_offs = (2 * np.random.rand(n_bb, 2) - 1) * center_off
# bbox resize ratios
resize_ratios = (2 * np.random.rand(n_bb, 2) - 1) * size_perturb + 1
# bbox: x1, y1, x2, y2
centers = (bbox[:, :2] + bbox[:, 2:]) / 2.
sizes = bbox[:, 2:] - bbox[:, :2]
new_centers = centers + center_offs * sizes
new_sizes = sizes * resize_ratios
new_x1y1 = new_centers - new_sizes / 2.
new_x2y2 = new_centers + new_sizes / 2.
c_min = [0, 0]
c_max = [img_size[1], img_size[0]]
new_x1y1 = np.clip(new_x1y1, c_min, c_max)
new_x2y2 = np.clip(new_x2y2, c_min, c_max)
bbox = np.hstack((new_x1y1, new_x2y2)).astype(np.float32)
return bbox
def sample_ref(self, idx):
# sample another frame in the same sequence as reference
vid, frame_id = idx
vid_info = self.vid_infos[vid]
sample_range = range(len(vid_info['filenames']))
valid_samples = []
for i in sample_range:
# check if the frame id is valid
ref_idx = (vid, i)
if i != frame_id and ref_idx in self.img_ids:
valid_samples.append(ref_idx)
assert len(valid_samples) > 0
return random.choice(valid_samples)
# sampling req sequence for TASUF
# sequence length from 1 to 8
# sequence direction => backward or forward
def sample_ref_seq(self, idx):
vid, frame_id = idx
vid_info = self.vid_infos[vid]
vid_len = len(vid_info['filenames'])
seq_len = random.randint(1, 8)
if frame_id < seq_len:
valid_samples = self.sample_ref_range(frame_id,
vid_len,
seq_len,
backward=True)
elif frame_id + seq_len > vid_len:
valid_samples = self.sample_ref_range(0,
frame_id,
seq_len,
backward=False)
else:
if random.random() < 0.5:
valid_samples = self.sample_ref_range(frame_id,
vid_len,
seq_len,
backward=True)
else:
valid_samples = self.sample_ref_range(0,
frame_id,
seq_len,
backward=False)
return valid_samples
def sample_ref_range(self, start, end, seq_len, backward=False):
sample_range = list(range(start, end))
while len(sample_range) < seq_len:
sample_range *= 2
valid_samples = random.sample(sample_range, seq_len)
valid_samples.sort()
# [JW]
for i, v in enumerate(valid_samples[:-1]):
if valid_samples[i + 1] - v > self.max_gap:
gap_modulation = valid_samples[i + 1] - v - self.max_gap
for j in range(i + 1, len(valid_samples)):
valid_samples[j] -= gap_modulation
if backward:
valid_samples.reverse()
return valid_samples
def prepare_train_img(self, idx):
# prepare a pair of image in a sequence
vid, frame_id = idx
vid_info = self.vid_infos[vid]
# load image
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames'][frame_id]))
basename = osp.basename(vid_info['filenames'][frame_id])
ref_frame_id_seq = self.sample_ref_seq(idx)
ref_img_seq =\
[mmcv.imread(osp.join(self.img_prefix, vid_info['filenames'][ref_frame_id]))
for ref_frame_id in ref_frame_id_seq]
# load proposals if necessary
if self.proposals is not None:
proposals = self.proposals[idx][:self.num_max_proposals]
# TODO: Handle empty proposals properly. Currently images with
# no proposals are just ignored, but they can be used for
# training in concept.
if len(proposals) == 0:
return None
if not (proposals.shape[1] == 4 or proposals.shape[1] == 5):
raise AssertionError(
'proposals should have shapes (n, 4) or (n, 5), '
'but found {}'.format(proposals.shape))
if proposals.shape[1] == 5:
scores = proposals[:, 4, None]
proposals = proposals[:, :4]
else:
scores = None
ann = self.get_ann_info(vid, frame_id)
ref_ann_seq =\
[self.get_ann_info(vid, ref_frame_id) for ref_frame_id in ref_frame_id_seq]
gt_bboxes = ann['bboxes']
gt_labels = ann['labels']
ref_bboxes_seq = []
for i, ref_ann in enumerate(ref_ann_seq):
ref_bboxes = ref_ann['bboxes']
if len(ref_bboxes) == 0:
return None
ref_bboxes_seq.append(ref_bboxes)
# obj ids attribute does not exist in current annotation
# need to add it
ref_ids_seq = [ref_ann['obj_ids'] for ref_ann in ref_ann_seq]
gt_ids = ann['obj_ids']
# compute matching of reference frame with current frame
# 0 denote there is no matching
id_set = set()
for ref_ids in ref_ids_seq:
id_set = id_set.union(set(ref_ids))
id_set = sorted(list(id_set))
gt_pids_seq = []
for ref_ids in ref_ids_seq:
gt_pids_seq.append([id_set.index(i) + 1 for i in ref_ids])
gt_pids_seq.append(
[id_set.index(i) + 1 if i in id_set else 0 for i in gt_ids])
if self.with_crowd:
gt_bboxes_ignore = ann['bboxes_ignore']
# skip the image if there is no valid gt bbox
if len(gt_bboxes) == 0:
return None
# extra augmentation
if self.extra_aug is not None:
img, gt_bboxes, gt_labels = self.extra_aug(img, gt_bboxes,
gt_labels)
# apply transforms
flip = True if np.random.rand() < self.flip_ratio else False
img_scale = random_scale(self.img_scales) # sample a scale
img, img_shape, pad_shape, scale_factor = self.img_transform(
img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
img = img.copy()
for i, ref_img in enumerate(ref_img_seq):
ref_img, ref_img_shape, _, ref_scale_factor = self.img_transform(
ref_img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
ref_img = ref_img.copy()
ref_img_seq[i] = ref_img
if self.proposals is not None:
proposals = self.bbox_transform(proposals, img_shape, scale_factor,
flip)
proposals = np.hstack([proposals, scores
]) if scores is not None else proposals
gt_bboxes = self.bbox_transform(gt_bboxes, img_shape, scale_factor,
flip)
for i, ref_bboxes in enumerate(ref_bboxes_seq):
ref_bboxes = self.bbox_transform(ref_bboxes, ref_img_shape,
ref_scale_factor, flip)
ref_bboxes_seq[i] = ref_bboxes
if self.aug_ref_bbox_param is not None:
for i, ref_bboxes in enumerate(ref_bboxes_seq):
ref_bboxes = self.bbox_aug(ref_bboxes, ref_img_shape)
ref_bboxes_seq[i] = ref_bboexs
if self.with_crowd:
gt_bboxes_ignore = self.bbox_transform(gt_bboxes_ignore, img_shape,
scale_factor, flip)
if self.with_mask:
gt_masks = self.mask_transform(ann['masks'], pad_shape,
scale_factor, flip)
ori_shape = (vid_info['height'], vid_info['width'], 3)
img_meta = dict(ori_shape=ori_shape,
img_shape=img_shape,
pad_shape=pad_shape,
scale_factor=scale_factor,
flip=flip)
ref_img_DC_seq = []
for ref_img in ref_img_seq:
ref_img_DC_seq.append(DC(to_tensor(ref_img), stack=True))
ref_bboxes_DC_seq = []
for ref_bboxes in ref_bboxes_seq:
ref_bboxes_DC_seq.append(DC(to_tensor(ref_bboxes)))
data = dict(img=DC(to_tensor(img), stack=True),
ref_img=ref_img_DC_seq,
img_meta=DC(img_meta, cpu_only=True),
gt_bboxes=DC(to_tensor(gt_bboxes)),
ref_bboxes=ref_bboxes_DC_seq)
if self.proposals is not None:
data['proposals'] = DC(to_tensor(proposals))
if self.with_label:
data['gt_labels'] = DC(to_tensor(gt_labels))
if self.with_track:
gt_pids_DC_seq = []
for gt_pids in gt_pids_seq:
gt_pids_DC_seq.append(DC(to_tensor(gt_pids)))
data['gt_pids'] = gt_pids_DC_seq
if self.with_crowd:
data['gt_bboxes_ignore'] = DC(to_tensor(gt_bboxes_ignore))
if self.with_mask:
data['gt_masks'] = DC(gt_masks, cpu_only=True)
return data
def prepare_test_img(self, idx):
"""Prepare an image for testing (multi-scale and flipping)"""
vid, frame_id = idx
vid_info = self.vid_infos[vid]
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames'][frame_id]))
proposal = None
def prepare_single(img, frame_id, scale, flip, proposal=None):
_img, img_shape, pad_shape, scale_factor = self.img_transform(
img, scale, flip, keep_ratio=self.resize_keep_ratio)
_img = to_tensor(_img)
_img_meta = dict(ori_shape=(vid_info['height'], vid_info['width'],
3),
img_shape=img_shape,
pad_shape=pad_shape,
is_first=(frame_id == 0),
video_id=vid,
frame_id=frame_id,
scale_factor=scale_factor,
flip=flip)
if proposal is not None:
if proposal.shape[1] == 5:
score = proposal[:, 4, None]
proposal = proposal[:, :4]
else:
score = None
_proposal = self.bbox_transform(proposal, img_shape,
scale_factor, flip)
_proposal = np.hstack([_proposal, score
]) if score is not None else _proposal
_proposal = to_tensor(_proposal)
else:
_proposal = None
return _img, _img_meta, _proposal
imgs = []
img_metas = []
proposals = []
for scale in self.img_scales:
_img, _img_meta, _proposal = prepare_single(
img, frame_id, scale, False, proposal)
imgs.append(_img)
img_metas.append(DC(_img_meta, cpu_only=True))
proposals.append(_proposal)
if self.flip_ratio > 0:
_img, _img_meta, _proposal = prepare_single(
img, scale, True, proposal)
imgs.append(_img)
img_metas.append(DC(_img_meta, cpu_only=True))
proposals.append(_proposal)
data = dict(img=imgs, img_meta=img_metas)
return data
def _parse_ann_info(self, ann_info, frame_id, with_mask=True):
"""Parse bbox and mask annotation.
Args:
ann_info (list[dict]): Annotation info of an image.
with_mask (bool): Whether to parse mask annotations.
Returns:
dict: A dict containing the following keys: bboxes, bboxes_ignore,
labels, masks, mask_polys, poly_lens.
"""
gt_bboxes = []
gt_labels = []
gt_ids = []
gt_bboxes_ignore = []
# Two formats are provided.
# 1. mask: a binary map of the same size of the image.
# 2. polys: each mask consists of one or several polys, each poly is a
# list of float.
if with_mask:
gt_masks = []
gt_mask_polys = []
gt_poly_lens = []
for i, ann in enumerate(ann_info):
# each ann is a list of masks
# ann:
# bbox: list of bboxes
# segmentation: list of segmentation
# category_id
# area: list of area
bbox = ann['bboxes'][frame_id]
area = ann['areas'][frame_id]
segm = ann['segmentations'][frame_id]
if bbox is None: continue
x1, y1, w, h = bbox
if area <= 0 or w < 1 or h < 1:
continue
bbox = [x1, y1, x1 + w - 1, y1 + h - 1]
if ann['iscrowd']:
gt_bboxes_ignore.append(bbox)
else:
gt_bboxes.append(bbox)
gt_ids.append(ann['id'])
gt_labels.append(self.cat2label[ann['category_id']])
if with_mask:
gt_masks.append(self.ytvos.annToMask(ann, frame_id))
mask_polys = [
p for p in segm if len(p) >= 6
] # valid polygons have >= 3 points (6 coordinates)
poly_lens = [len(p) for p in mask_polys]
gt_mask_polys.append(mask_polys)
gt_poly_lens.extend(poly_lens)
if gt_bboxes:
gt_bboxes = np.array(gt_bboxes, dtype=np.float32)
gt_labels = np.array(gt_labels, dtype=np.int64)
else:
gt_bboxes = np.zeros((0, 4), dtype=np.float32)
gt_labels = np.array([], dtype=np.int64)
if gt_bboxes_ignore:
gt_bboxes_ignore = np.array(gt_bboxes_ignore, dtype=np.float32)
else:
gt_bboxes_ignore = np.zeros((0, 4), dtype=np.float32)
ann = dict(bboxes=gt_bboxes,
labels=gt_labels,
obj_ids=gt_ids,
bboxes_ignore=gt_bboxes_ignore)
if with_mask:
ann['masks'] = gt_masks
# poly format is not used in the current implementation
ann['mask_polys'] = gt_mask_polys
ann['poly_lens'] = gt_poly_lens
return ann
class YTVOSDataset(CustomDataset):
CLASSES = ('person', 'giant_panda', 'lizard', 'parrot', 'skateboard',
'sedan', 'ape', 'dog', 'snake', 'monkey', 'hand', 'rabbit',
'duck', 'cat', 'cow', 'fish', 'train', 'horse', 'turtle',
'bear', 'motorbike', 'giraffe', 'leopard', 'fox', 'deer', 'owl',
'surfboard', 'airplane', 'truck', 'zebra', 'tiger', 'elephant',
'snowboard', 'boat', 'shark', 'mouse', 'frog', 'eagle',
'earless_seal', 'tennis_racket')
def __init__(self,
ann_file,
img_prefix,
img_scale,
img_norm_cfg,
size_divisor=None,
proposal_file=None,
num_max_proposals=1000,
flip_ratio=0,
with_mask=True,
with_crowd=True,
with_label=True,
with_track=False,
extra_aug=None,
aug_ref_bbox_param=None,
resize_keep_ratio=True,
test_mode=False,
every_frame=False,
is_flow=False,
flow_test=False):
# prefix of images path
self.img_prefix = img_prefix
# load annotations (and proposals)
self.vid_infos = self.load_annotations(ann_file)
self.every_frame = every_frame
self.is_flow = is_flow
self.flow_test = flow_test
if self.flow_test or self.is_flow:
self.cuda = True
self.cuda = False
if self.cuda:
from mmcv import Config
from mmdet.models import build_detector
from mmcv.runner import load_checkpoint
cfg = Config.fromfile(
"../configs/masktrack_rcnn_r50_fpn_1x_flow_youtubevos.py")
self.det_model = build_detector(cfg.model,
train_cfg=cfg.train_cfg,
test_cfg=cfg.test_cfg)
load_checkpoint(self.det_model,
"../results/20200312-180434/epoch_9.pth")
self.det_model = self.det_model.cuda()
self.det_model.eval()
for param in self.det_model.parameters():
param.requires_grad = False
# Set indexes for data loading
img_ids = [] # training frames which have annotations
img_ids_all = [] # all training frames
img_ids_pairs = [] # flow data pairs
for idx, vid_info in enumerate(self.vid_infos):
vid_name = vid_info['filenames'][0].split('/')[0]
folder_path = osp.join(self.img_prefix, vid_name)
files = os.listdir(folder_path)
files.sort()
vid_info['filenames_all'] = [
osp.join(vid_name, file) for file in files
]
for _id in range(len(files)):
img_ids_all.append((idx, _id))
is_anno = vid_info['filenames_all'][_id] in vid_info[
'filenames']
if is_anno and _id > 0: # having annotation and is not the first frame.
ann_idx = vid_info['filenames'].index(
vid_info['filenames_all'][_id])
ann = self.get_ann_info(idx, ann_idx)
gt_bboxes = ann['bboxes']
# skip the image if there is no valid gt bbox
if len(gt_bboxes) == 0:
continue
# random select key frame
key_id = _id - np.random.randint(1, min(10, _id))
img_ids_pairs.append(((idx, key_id), (idx, _id)))
for frame_id in range(len(vid_info['filenames'])):
img_ids.append((idx, frame_id))
self.img_ids = img_ids
self.img_ids_all = img_ids_all
self.img_ids_pairs = img_ids_pairs
if proposal_file is not None:
self.proposals = self.load_proposals(proposal_file)
else:
self.proposals = None
# filter images with no annotation during training
if not test_mode:
valid_inds = [
i for i, (v, f) in enumerate(self.img_ids)
if len(self.get_ann_info(v, f)['bboxes'])
]
self.img_ids = [self.img_ids[i] for i in valid_inds]
# (long_edge, short_edge) or [(long1, short1), (long2, short2), ...]
self.img_scales = img_scale if isinstance(img_scale,
list) else [img_scale]
assert mmcv.is_list_of(self.img_scales, tuple)
# normalization configs
self.img_norm_cfg = img_norm_cfg
# max proposals per image
self.num_max_proposals = num_max_proposals
# flip ratio
self.flip_ratio = flip_ratio
assert flip_ratio >= 0 and flip_ratio <= 1
# padding border to ensure the image size can be divided by
# size_divisor (used for FPN)
self.size_divisor = size_divisor
# with mask or not (reserved field, takes no effect)
self.with_mask = with_mask
# some datasets provide bbox annotations as ignore/crowd/difficult,
# if `with_crowd` is True, then these info is returned.
self.with_crowd = with_crowd
# with label is False for RPN
self.with_label = with_label
self.with_track = with_track
# params for augmenting bbox in the reference frame
self.aug_ref_bbox_param = aug_ref_bbox_param
# in test mode or not
self.test_mode = test_mode
# set group flag for the sampler
if not self.test_mode:
self._set_group_flag()
# transforms
self.img_transform = ImageTransform(size_divisor=self.size_divisor,
**self.img_norm_cfg)
self.bbox_transform = BboxTransform()
self.mask_transform = MaskTransform()
self.numpy2tensor = Numpy2Tensor()
# if use extra augmentation
if extra_aug is not None:
self.extra_aug = ExtraAugmentation(**extra_aug)
else:
self.extra_aug = None
# image rescale if keep ratio
self.resize_keep_ratio = resize_keep_ratio
def __len__(self):
if self.every_frame:
return len(self.img_ids_all)
elif self.is_flow:
return len(self.img_ids_pairs)
else:
return len(self.img_ids)
def __getitem__(self, idx):
if self.test_mode:
if self.every_frame:
return self.prepare_test_img(self.img_ids_all[idx])
else:
return self.prepare_test_img(self.img_ids[idx])
if self.is_flow:
if self.flow_test:
data = self.prepare_train_flow_test_img(
self.img_ids_pairs[idx])
else:
data = self.prepare_train_flow_img(self.img_ids_pairs[idx])
else:
data = self.prepare_train_img(self.img_ids[idx])
return data
def load_annotations(self, ann_file):
self.ytvos = YTVOS(ann_file)
self.cat_ids = self.ytvos.getCatIds()
self.cat2label = {
cat_id: i + 1
for i, cat_id in enumerate(self.cat_ids)
}
self.vid_ids = self.ytvos.getVidIds()
vid_infos = []
for i in self.vid_ids:
info = self.ytvos.loadVids([i])[0]
info['filenames'] = info['file_names']
vid_infos.append(info)
return vid_infos
def get_ann_info(self, idx, frame_id):
vid_id = self.vid_infos[idx]['id']
ann_ids = self.ytvos.getAnnIds(vidIds=[vid_id])
ann_info = self.ytvos.loadAnns(ann_ids)
return self._parse_ann_info(ann_info, frame_id)
def _set_group_flag(self):
"""Set flag according to image aspect ratio.
Images with aspect ratio greater than 1 will be set as group 1,
otherwise group 0.
"""
self.flag = np.zeros(len(self), dtype=np.uint8)
for i in range(len(self)):
vid_id, _ = self.img_ids[i]
vid_info = self.vid_infos[vid_id]
if vid_info['width'] / vid_info['height'] > 1:
self.flag[i] = 1
def bbox_aug(self, bbox, img_size):
assert self.aug_ref_bbox_param is not None
center_off = self.aug_ref_bbox_param[0]
size_perturb = self.aug_ref_bbox_param[1]
n_bb = bbox.shape[0]
# bbox center offset
center_offs = (2 * np.random.rand(n_bb, 2) - 1) * center_off
# bbox resize ratios
resize_ratios = (2 * np.random.rand(n_bb, 2) - 1) * size_perturb + 1
# bbox: x1, y1, x2, y2
centers = (bbox[:, :2] + bbox[:, 2:]) / 2.
sizes = bbox[:, 2:] - bbox[:, :2]
new_centers = centers + center_offs * sizes
new_sizes = sizes * resize_ratios
new_x1y1 = new_centers - new_sizes / 2.
new_x2y2 = new_centers + new_sizes / 2.
c_min = [0, 0]
c_max = [img_size[1], img_size[0]]
new_x1y1 = np.clip(new_x1y1, c_min, c_max)
new_x2y2 = np.clip(new_x2y2, c_min, c_max)
bbox = np.hstack((new_x1y1, new_x2y2)).astype(np.float32)
return bbox
def sample_ref(self, idx):
# sample another frame in the same sequence as reference
vid, frame_id = idx
vid_info = self.vid_infos[vid]
sample_range = range(len(vid_info['filenames']))
valid_samples = []
for i in sample_range:
# check if the frame id is valid
ref_idx = (vid, i)
if i != frame_id and ref_idx in self.img_ids:
valid_samples.append(ref_idx)
assert len(valid_samples) > 0
return random.choice(valid_samples)
def prepare_train_flow_test_img(self, idx):
# prepare a pair of image in a sequence
vid, key_frame_id = idx[0]
_, cur_frame_id = idx[1]
vid_info = self.vid_infos[vid]
# load image
key_img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][key_frame_id]))
cur_img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][cur_frame_id]))
h_orig, w_orig, _ = key_img.shape
basename = osp.basename(vid_info['filenames_all'][key_frame_id])
# apply transforms
flip = True if np.random.rand() < self.flip_ratio else False
img_scale = random_scale(self.img_scales) # sample a scale
cur_img, img_shape, pad_shape, scale_factor = self.img_transform(
cur_img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
if (type(scale_factor)) != float:
scale_factor = tuple(scale_factor)
cur_img = cur_img.copy()
key_img, key_img_shape, _, ref_scale_factor = self.img_transform(
key_img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
key_img = key_img.copy()
# trans = torchvision.transforms.ToTensor()
key_img = torch.from_numpy(key_img).cuda()
cur_img = torch.from_numpy(cur_img).cuda()
def resize(feat_map, size=(48, 64)):
"""Resize feature map to certain size."""
key_feature = torch.nn.functional.interpolate(feat_map,
size,
mode='bilinear',
align_corners=True)
return key_feature
img_size = (384, 640)
if key_img.shape[-2:] != img_size:
key_img = resize(key_img.unsqueeze(0), img_size).squeeze(0)
cur_img = resize(cur_img.unsqueeze(0), img_size).squeeze(0)
key_feature_maps, _ = self.det_model.extract_feat(key_img.unsqueeze(0))
cur_feature_maps, _ = self.det_model.extract_feat(cur_img.unsqueeze(0))
key_feature_maps = [
feat_map.squeeze(0) for feat_map in key_feature_maps
]
cur_feature_maps = [
feat_map.squeeze(0) for feat_map in cur_feature_maps
]
data = dict(key_img=key_img,
cur_img=cur_img,
key_img_feats=key_feature_maps,
cur_img_feats=cur_feature_maps)
return data
def prepare_train_flow_img(self, idx):
# prepare a pair of image in a sequence
vid, key_frame_id = idx[0]
_, cur_frame_id = idx[1]
vid_info = self.vid_infos[vid]
# load image
key_img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][key_frame_id]))
cur_img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][cur_frame_id]))
h_orig, w_orig, _ = cur_img.shape
basename = osp.basename(vid_info['filenames_all'][key_frame_id])
# load proposals if necessary
if self.proposals is not None:
proposals = self.proposals[idx][:self.num_max_proposals]
# TODO: Handle empty proposals properly. Currently images with
# no proposals are just ignored, but they can be used for
# training in concept.
if len(proposals) == 0:
return None
if not (proposals.shape[1] == 4 or proposals.shape[1] == 5):
raise AssertionError(
'proposals should have shapes (n, 4) or (n, 5), '
'but found {}'.format(proposals.shape))
if proposals.shape[1] == 5:
scores = proposals[:, 4, None]
proposals = proposals[:, :4]
else:
scores = None
ann_idx = vid_info['filenames'].index(
vid_info['filenames_all'][cur_frame_id])
ann = self.get_ann_info(vid, ann_idx)
gt_bboxes = ann['bboxes']
gt_labels = ann['labels']
if self.with_crowd:
gt_bboxes_ignore = ann['bboxes_ignore']
# skip the image if there is no valid gt bbox
if len(gt_bboxes) == 0:
return None
# extra augmentation
if self.extra_aug is not None:
cur_img, gt_bboxes, gt_labels = self.extra_aug(
cur_img, gt_bboxes, gt_labels)
# apply transforms
flip = True if np.random.rand() < self.flip_ratio else False
img_scales = [(1280, 720), (640, 360)]
# img_scale = random_scale(self.img_scales) # sample a scale
cur_img, img_shape, pad_shape, scale_factor = self.img_transform(
cur_img, img_scales[1], flip, keep_ratio=self.resize_keep_ratio)
if (type(scale_factor)) != float:
scale_factor = tuple(scale_factor)
cur_img = cur_img.copy()
key_img, key_img_shape, _, key_scale_factor = self.img_transform(
key_img, img_scales[0], flip, keep_ratio=self.resize_keep_ratio)
key_img = key_img.copy()
if self.proposals is not None:
proposals = self.bbox_transform(proposals, img_shape, scale_factor,
flip)
proposals = np.hstack([proposals, scores
]) if scores is not None else proposals
gt_bboxes = self.bbox_transform(gt_bboxes, img_shape, scale_factor,
flip)
if self.with_crowd:
gt_bboxes_ignore = self.bbox_transform(gt_bboxes_ignore, img_shape,
scale_factor, flip)
if self.with_mask:
if w_orig > h_orig:
h, w = img_shape[0], img_shape[1]
_scale_factor = tuple([w, h, w, h])
else:
_scale_factor = scale_factor
gt_masks = self.mask_transform(ann['masks'], pad_shape,
_scale_factor, flip)
ori_shape = (vid_info['height'], vid_info['width'], 3)
img_meta = dict(ori_shape=ori_shape,
img_shape=img_shape,
pad_shape=pad_shape,
scale_factor=scale_factor,
is_first=(cur_frame_id == 0),
flip=flip)
data = dict(
img=DC(to_tensor(key_img), stack=True),
ref_img=DC(to_tensor(cur_img), stack=True),
img_meta=DC(img_meta, cpu_only=True),
gt_bboxes=DC(to_tensor(gt_bboxes)),
# ref_bboxes=DC(to_tensor(ref_bboxes))
)
if self.proposals is not None:
data['proposals'] = DC(to_tensor(proposals))
if self.with_label:
data['gt_labels'] = DC(to_tensor(gt_labels))
# if self.with_track:
# data['gt_pids'] = DC(to_tensor(gt_pids))
if self.with_crowd:
data['gt_bboxes_ignore'] = DC(to_tensor(gt_bboxes_ignore))
if self.with_mask:
data['gt_masks'] = DC(gt_masks, cpu_only=True)
data['train_flow'] = True
if self.cuda:
key_img_cuda = torch.from_numpy(key_img).cuda()
cur_img_cuda = torch.from_numpy(cur_img).cuda()
def resize(feat_map, size=(48, 64)):
"""Resize feature map to certain size."""
key_feature = torch.nn.functional.interpolate(
feat_map, size, mode='bilinear', align_corners=True)
return key_feature
img_size = (384, 640)
if key_img_cuda.shape[-2:] != img_size:
key_img_cuda = resize(key_img_cuda.unsqueeze(0),
img_size).squeeze(0)
cur_img_cuda = resize(cur_img_cuda.unsqueeze(0),
img_size).squeeze(0)
key_feature_maps, _ = self.det_model.extract_feat(
key_img_cuda.unsqueeze(0))
cur_feature_maps, _ = self.det_model.extract_feat(
cur_img_cuda.unsqueeze(0))
key_feature_maps = [
feat_map.squeeze(0) for feat_map in key_feature_maps
]
cur_feature_maps = [
feat_map.squeeze(0) for feat_map in cur_feature_maps
]
data['key_feature_maps'] = key_feature_maps
data['cur_feature_maps'] = cur_feature_maps
return data
def prepare_train_img(self, idx):
# prepare a pair of image in a sequence
vid, frame_id = idx
vid_info = self.vid_infos[vid]
# load image
if self.is_flow or self.every_frame:
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][frame_id]))
else:
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames'][frame_id]))
h_orig, w_orig, _ = img.shape
basename = osp.basename(vid_info['filenames'][frame_id])
_, ref_frame_id = self.sample_ref(idx)
ref_img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames'][ref_frame_id]))
# load proposals if necessary
if self.proposals is not None:
proposals = self.proposals[idx][:self.num_max_proposals]
# TODO: Handle empty proposals properly. Currently images with
# no proposals are just ignored, but they can be used for
# training in concept.
if len(proposals) == 0:
return None
if not (proposals.shape[1] == 4 or proposals.shape[1] == 5):
raise AssertionError(
'proposals should have shapes (n, 4) or (n, 5), '
'but found {}'.format(proposals.shape))
if proposals.shape[1] == 5:
scores = proposals[:, 4, None]
proposals = proposals[:, :4]
else:
scores = None
ann = self.get_ann_info(vid, frame_id)
ref_ann = self.get_ann_info(vid, ref_frame_id)
gt_bboxes = ann['bboxes']
gt_labels = ann['labels']
ref_bboxes = ref_ann['bboxes']
# obj ids attribute does not exist in current annotation
# need to add it
ref_ids = ref_ann['obj_ids']
gt_ids = ann['obj_ids']
# compute matching of reference frame with current frame
# 0 denote there is no matching
gt_pids = [ref_ids.index(i) + 1 if i in ref_ids else 0 for i in gt_ids]
if self.with_crowd:
gt_bboxes_ignore = ann['bboxes_ignore']
# skip the image if there is no valid gt bbox
if len(gt_bboxes) == 0:
return None
# extra augmentation
if self.extra_aug is not None:
img, gt_bboxes, gt_labels = self.extra_aug(img, gt_bboxes,
gt_labels)
# apply transforms
flip = True if np.random.rand() < self.flip_ratio else False
img_scale = random_scale(self.img_scales) # sample a scale
img, img_shape, pad_shape, scale_factor = self.img_transform(
img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
if (type(scale_factor)) != float:
scale_factor = tuple(scale_factor)
img = img.copy()
ref_img, ref_img_shape, _, ref_scale_factor = self.img_transform(
ref_img, img_scale, flip, keep_ratio=self.resize_keep_ratio)
ref_img = ref_img.copy()
if self.proposals is not None:
proposals = self.bbox_transform(proposals, img_shape, scale_factor,
flip)
proposals = np.hstack([proposals, scores
]) if scores is not None else proposals
gt_bboxes = self.bbox_transform(gt_bboxes, img_shape, scale_factor,
flip)
ref_bboxes = self.bbox_transform(ref_bboxes, ref_img_shape,
ref_scale_factor, flip)
if self.aug_ref_bbox_param is not None:
ref_bboxes = self.bbox_aug(ref_bboxes, ref_img_shape)
if self.with_crowd:
gt_bboxes_ignore = self.bbox_transform(gt_bboxes_ignore, img_shape,
scale_factor, flip)
if self.with_mask:
if w_orig > h_orig:
h, w = img_shape[0], img_shape[1]
_scale_factor = tuple([w, h, w, h])
else:
_scale_factor = scale_factor
gt_masks = self.mask_transform(ann['masks'], pad_shape,
_scale_factor, flip)
ori_shape = (vid_info['height'], vid_info['width'], 3)
img_meta = dict(ori_shape=ori_shape,
img_shape=img_shape,
pad_shape=pad_shape,
scale_factor=scale_factor,
is_first=(frame_id == 0),
flip=flip)
data = dict(img=DC(to_tensor(img), stack=True),
ref_img=DC(to_tensor(ref_img), stack=True),
img_meta=DC(img_meta, cpu_only=True),
gt_bboxes=DC(to_tensor(gt_bboxes)),
ref_bboxes=DC(to_tensor(ref_bboxes)))
if self.proposals is not None:
data['proposals'] = DC(to_tensor(proposals))
if self.with_label:
data['gt_labels'] = DC(to_tensor(gt_labels))
if self.with_track:
data['gt_pids'] = DC(to_tensor(gt_pids))
if self.with_crowd:
data['gt_bboxes_ignore'] = DC(to_tensor(gt_bboxes_ignore))
if self.with_mask:
data['gt_masks'] = DC(gt_masks, cpu_only=True)
return data
def prepare_test_img(self, idx):
"""Prepare an image for testing (multi-scale and flipping)"""
vid, frame_id = idx
vid_info = self.vid_infos[vid]
is_anno = True
if self.every_frame:
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames_all'][frame_id]))
is_anno = vid_info['filenames_all'][frame_id] in vid_info[
'filenames']
else:
img = mmcv.imread(
osp.join(self.img_prefix, vid_info['filenames'][frame_id]))
proposal = None
if self.every_frame:
file_name = vid_info['filenames_all'][frame_id]
else:
file_name = vid_info['filenames'][frame_id]
def prepare_single(img,
frame_id,
scale,
flip,
file_name,
proposal=None,
is_anno=True):
_img, img_shape, pad_shape, scale_factor = self.img_transform(
img, scale, flip, keep_ratio=self.resize_keep_ratio)
_img = to_tensor(_img)
_img_meta = dict(ori_shape=(vid_info['height'], vid_info['width'],
3),
img_shape=img_shape,
pad_shape=pad_shape,
is_first=(frame_id == 0),
video_id=vid,
file_name=file_name,
frame_id=frame_id,
scale_factor=scale_factor,
flip=flip,
is_anno=is_anno)
if proposal is not None:
if proposal.shape[1] == 5:
score = proposal[:, 4, None]
proposal = proposal[:, :4]
else:
score = None
_proposal = self.bbox_transform(proposal, img_shape,
scale_factor, flip)
_proposal = np.hstack([_proposal, score
]) if score is not None else _proposal
_proposal = to_tensor(_proposal)
else:
_proposal = None
return _img, _img_meta, _proposal
imgs = []
img_metas = []
proposals = []
for scale in self.img_scales:
_img, _img_meta, _proposal = prepare_single(
img, frame_id, scale, False, file_name, proposal, is_anno)
imgs.append(_img)
img_metas.append(DC(_img_meta, cpu_only=True))
proposals.append(_proposal)
if self.flip_ratio > 0:
_img, _img_meta, _proposal = prepare_single(
img, scale, True, file_name, proposal, is_anno)
imgs.append(_img)
img_metas.append(DC(_img_meta, cpu_only=True))
proposals.append(_proposal)
data = dict(img=imgs, img_meta=img_metas)
return data
def _parse_ann_info(self, ann_info, frame_id, with_mask=True):
"""Parse bbox and mask annotation.
Args:
ann_info (list[dict]): Annotation info of an image.
with_mask (bool): Whether to parse mask annotations.
Returns:
dict: A dict containing the following keys: bboxes, bboxes_ignore,
labels, masks, mask_polys, poly_lens.
"""
gt_bboxes = []
gt_labels = []
gt_ids = []
gt_bboxes_ignore = []
# Two formats are provided.
# 1. mask: a binary map of the same size of the image.
# 2. polys: each mask consists of one or several polys, each poly is a
# list of float.
if with_mask:
gt_masks = []
gt_mask_polys = []
gt_poly_lens = []
for i, ann in enumerate(ann_info):
# each ann is a list of masks
# ann:
# bbox: list of bboxes
# segmentation: list of segmentation
# category_id
# area: list of area
bbox = ann['bboxes'][frame_id]
area = ann['areas'][frame_id]
segm = ann['segmentations'][frame_id]
if bbox is None: continue
x1, y1, w, h = bbox
if area <= 0 or w < 1 or h < 1:
continue
bbox = [x1, y1, x1 + w - 1, y1 + h - 1]
if ann['iscrowd']:
gt_bboxes_ignore.append(bbox)
else:
gt_bboxes.append(bbox)
gt_ids.append(ann['id'])
gt_labels.append(self.cat2label[ann['category_id']])
if with_mask:
gt_masks.append(self.ytvos.annToMask(ann, frame_id))
mask_polys = [
p for p in segm if len(p) >= 6
] # valid polygons have >= 3 points (6 coordinates)
poly_lens = [len(p) for p in mask_polys]
gt_mask_polys.append(mask_polys)
gt_poly_lens.extend(poly_lens)
if gt_bboxes:
gt_bboxes = np.array(gt_bboxes, dtype=np.float32)
gt_labels = np.array(gt_labels, dtype=np.int64)
else:
gt_bboxes = np.zeros((0, 4), dtype=np.float32)
gt_labels = np.array([], dtype=np.int64)
if gt_bboxes_ignore:
gt_bboxes_ignore = np.array(gt_bboxes_ignore, dtype=np.float32)
else:
gt_bboxes_ignore = np.zeros((0, 4), dtype=np.float32)
ann = dict(bboxes=gt_bboxes,
labels=gt_labels,
obj_ids=gt_ids,
bboxes_ignore=gt_bboxes_ignore)
if with_mask:
ann['masks'] = gt_masks
# poly format is not used in the current implementation
ann['mask_polys'] = gt_mask_polys
ann['poly_lens'] = gt_poly_lens
return ann
class YTVOSDataset(CustomDataset):
CLASSES = ('person', 'giant_panda', 'lizard', 'parrot', 'skateboard',
'sedan', 'ape', 'dog', 'snake', 'monkey', 'hand', 'rabbit',
'duck', 'cat', 'cow', 'fish', 'train', 'horse', 'turtle',
'bear', 'motorbike', 'giraffe', 'leopard', 'fox', 'deer', 'owl',
'surfboard', 'airplane', 'truck', 'zebra', 'tiger', 'elephant',
'snowboard', 'boat', 'shark', 'mouse', 'frog', 'eagle',
'earless_seal', 'tennis_racket')
def __init__(self,
ann_file,
pipeline,
data_root=None,
img_prefix='',
of_prefix=None,
seg_prefix=None,
proposal_file=None,
test_mode=False,
filter_empty_gt=True,
seq_len=0,
step=1):
# prefix of images path
self.ann_file = ann_file
self.data_root = data_root
self.img_prefix = img_prefix
self.of_prefix = of_prefix
self.seg_prefix = seg_prefix
self.proposal_file = proposal_file
self.test_mode = test_mode
self.filter_empty_gt = filter_empty_gt
self.seq_len = seq_len
# join paths if data_root is specified
if self.data_root is not None:
if not osp.isabs(self.ann_file):
self.ann_file = osp.join(self.data_root, self.ann_file)
if not (self.img_prefix is None or osp.isabs(self.img_prefix)):
self.img_prefix = osp.join(self.data_root, self.img_prefix)
if not (self.of_prefix is None or osp.isabs(self.of_prefix)):
self.of_prefix = osp.join(self.data_root, self.of_prefix)
if not (self.seg_prefix is None or osp.isabs(self.seg_prefix)):
self.seg_prefix = osp.join(self.data_root, self.seg_prefix)
if not (self.proposal_file is None
or osp.isabs(self.proposal_file)):
self.proposal_file = osp.join(self.data_root,
self.proposal_file)
# load annotations (and proposals)
self.vid_infos = self.load_annotations(ann_file)
self.sample_ids = []
self._frame_ids = {}
for vid_id, vid_info in self.vid_infos.items():
#video_img_ids = []
video_sample_ids = []
for frame_id in range(len(vid_info['filenames'])):
idx = (vid_id, frame_id)
if test_mode or len(self.get_ann_info(idx)['masks']):
video_sample_ids.append(idx)
if len(video_sample_ids) >= seq_len:
self._frame_ids[vid_id] = video_sample_ids
if seq_len > 0:
self.sample_ids = self.sample_ids + video_sample_ids[
0::step]
#if test_mode:
# self.sample_ids = self.sample_ids+ [video_sample_ids[-1]]
else:
self.sample_ids = self.sample_ids + [video_sample_ids[-1]]
if proposal_file is not None:
self.proposals = self.load_proposals(proposal_file)
else:
self.proposals = None
# set group flag for the sampler
if not self.test_mode:
self._set_group_flag()
# processing pipeline
self.pipeline = Compose(pipeline)
def __len__(self):
return len(self.sample_ids)
def _rand_another(self, idx):
pool = np.where(self.flag == self.flag[idx])[0]
return np.random.choice(pool)
def __getitem__(self, idx):
if self.test_mode:
return self.prepare_test_img(self.sample_ids[idx])
while True:
data = self.prepare_train_img(self.sample_ids[idx])
if data is None:
idx = self._rand_another(idx)
continue
return data
def load_annotations(self, ann_file):
self.ytvos = YTVOS(ann_file)
self.cat_ids = self.ytvos.getCatIds()
self.cat2label = {
cat_id: i + 1
for i, cat_id in enumerate(self.cat_ids)
}
self.vid_ids = self.ytvos.getVidIds()
vid_infos = {}
for i in self.vid_ids:
info = self.ytvos.loadVids([i])[0]
info['filenames'] = info['file_names']
vid_infos[i] = info
return vid_infos
def get_ann_info(self, idx):
vid_id, frame_id = idx
#vid_id = self.vid_infos[idx]['id']
ann_ids = self.ytvos.getAnnIds(vidIds=[vid_id])
ann_info = self.ytvos.loadAnns(ann_ids)
return self._parse_ann_info(self.get_image_info(idx), ann_info,
frame_id)
def get_image_info(self, idx):
vid_id, frame_id = idx
vid_info = self.vid_infos[vid_id]
return dict(filename=vid_info['filenames'][frame_id],
height=vid_info['height'],
width=vid_info['width'],
video_id=vid_id,
frame_id=frame_id)
def pre_pipeline(self, results, idx, prev_results=None):
results['img_prefix'] = self.img_prefix
results['of_prefix'] = self.of_prefix
results['seg_prefix'] = self.seg_prefix
results['proposal_file'] = self.proposal_file
results['bbox_fields'] = []
results['mask_fields'] = []
results['seg_fields'] = []
video_id, frame_id = idx
results['video_id'] = video_id
results['frame_id'] = frame_id
if prev_results is not None:
results.update(prev_results)
def _set_group_flag(self):
"""Set flag according to image aspect ratio.
Images with aspect ratio greater than 1 will be set as group 1,
otherwise group 0.
"""
self.flag = np.zeros(len(self.sample_ids), dtype=np.uint8)
for vid_id, _ in self.sample_ids:
vid_info = self.vid_infos[vid_id]
if vid_info['width'] / vid_info['height'] > 1:
self.flag[vid_id] = 1
def sample_ref_seq(self, idx):
vid, fid = idx
ref_frame_ids = self._frame_ids[vid]
frame_index = ref_frame_ids.index(idx)
ref_frame_ids_1 = ref_frame_ids[max(frame_index -
(self.seq_len), 0):frame_index]
ref_frame_ids_2 = ref_frame_ids[frame_index + 1:frame_index +
(self.seq_len)]
ref_frame_ids = ref_frame_ids_1 + ref_frame_ids_2
if len(ref_frame_ids) < self.seq_len - 1:
print('frame_index', frame_index, frame_index - self.seq_len,
frame_index + self.seq_len, ref_frame_ids)
return None, 0
ref_frame_ids = random.sample(ref_frame_ids, self.seq_len - 1)
ref_frame_ids.append((vid, fid))
ref_frame_ids.sort()
frame_index = ref_frame_ids.index(idx)
return ref_frame_ids, frame_index
def test_ref_seq(self, idx):
vid, fid = idx
ref_frame_ids = self._frame_ids[vid]
frame_index = ref_frame_ids.index(idx)
ref_frame_ids = ref_frame_ids[frame_index:frame_index + self.seq_len]
if len(ref_frame_ids) < self.seq_len:
print('frame_index', frame_index, frame_index - self.seq_len,
frame_index + self.seq_len, ref_frame_ids)
ref_frame_ids = None
else:
ref_frame_ids.sort()
return ref_frame_ids
def prepare_train_img(self, idx):
# prepare a pair of image in a sequence
seq = []
flip_keys = ['flip', 'flip_direction']
prev_results = None
samples, ref_frame_index = self.sample_ref_seq(idx)
if samples is None:
return None
for sample_idx in samples:
img_info = self.get_image_info(sample_idx)
ann_info = self.get_ann_info(sample_idx)
results = dict(img_info=img_info, ann_info=ann_info)
if self.proposals is not None:
results['proposals'] = self.proposals[idx]
self.pre_pipeline(results, sample_idx, prev_results=prev_results)
seq.append(self.pipeline(results))
if prev_results is None:
prev_results = {
flip_key: results[flip_key]
for flip_key in flip_keys
}
return dict(img=seq[0]['img'],
img_meta=seq[0]['img_meta'],
inp_seq=seq,
ref_frame_index=ref_frame_index)
def prepare_test_img(self, idx):
vid, fid = idx
ref_frame_ids = self._frame_ids[vid]
ref_frame_ids.sort()
#frame_idx = ref_frame_ids.index((str(vid), fid))
frame_idx = ref_frame_ids.index((vid, fid))
ref_frame_ids = ref_frame_ids[frame_idx:frame_idx + self.seq_len]
seq = []
for sample_idx in ref_frame_ids:
img_info = self.get_image_info(sample_idx)
results = dict(img_info=img_info)
if self.proposals is not None:
results['proposals'] = self.proposals[idx]
self.pre_pipeline(results, sample_idx)
seq.append(self.pipeline(results))
return dict(img=seq[0]['img'],
img_meta=seq[0]['img_meta'],
inp_seq=seq)
def _parse_ann_info(self, img_info, ann_info, frame_id):
"""Parse bbox and mask annotation.
Args:
ann_info (list[dict]): Annotation info of an image.
with_mask (bool): Whether to parse mask annotations.
Returns:
dict: A dict containing the following keys: bboxes, bboxes_ignore,
labels, masks, seg_map. "masks" are raw annotations and not
decoded into binary masks.
"""
gt_bboxes = []
gt_labels = []
gt_ids = []
gt_bboxes_ignore = []
gt_masks_ann = []
for i, ann in enumerate(ann_info):
# each ann is a list of masks
# ann:
# bbox: list of bboxes
# segmentation: list of segmentation
# category_id
# area: list of area
bbox = ann['bboxes'][frame_id]
area = ann['areas'][frame_id]
segm = ann['segmentations'][frame_id]
if bbox is None: continue
x1, y1, w, h = bbox
if area <= 0 or w < 1 or h < 1:
continue
bbox = [x1, y1, x1 + w - 1, y1 + h - 1]
if ann.get('iscrowd', False):
gt_bboxes_ignore.append(bbox)
else:
gt_bboxes.append(bbox)
gt_ids.append(ann['id'])
gt_labels.append(self.cat2label[ann['category_id']])
gt_masks_ann.append(ann['segmentations'][frame_id])
if gt_bboxes:
gt_bboxes = np.array(gt_bboxes, dtype=np.float32)
gt_labels = np.array(gt_labels, dtype=np.int64)
gt_ids = np.array(gt_ids, dtype=np.int64)
else:
gt_bboxes = np.zeros((0, 4), dtype=np.float32)
gt_labels = np.array([], dtype=np.int64)
gt_ids = np.array([], dtype=np.int64)
if gt_bboxes_ignore:
gt_bboxes_ignore = np.array(gt_bboxes_ignore, dtype=np.float32)
else:
gt_bboxes_ignore = np.zeros((0, 4), dtype=np.float32)
seg_map = img_info['filename'].replace('jpg', 'png')
ann = dict(bboxes=gt_bboxes,
labels=gt_labels,
inst_ids=gt_ids,
bboxes_ignore=gt_bboxes_ignore,
masks=gt_masks_ann,
seg_map=seg_map)
return ann
def _segm2json(self, results_list):
"""Dump the detection results to a json file.
There are 3 types of results: proposals, bbox predictions, mask
predictions, and they have different data types. This method will
automatically recognize the type, and dump them to json files.
Args:
results (list[list | tuple | ndarray]): Testing results of the
dataset.
outfile_prefix (str): The filename prefix of the json files. If the
prefix is "somepath/xxx", the json files will be named
"somepath/xxx.bbox.json", "somepath/xxx.segm.json",
"somepath/xxx.proposal.json".
Returns:
dict[str: str]: Possible keys are "bbox", "segm", "proposal", and
values are corresponding filenames.
"""
results = []
for rl_det, rl_seg in results_list:
for d, s in zip(rl_det, rl_seg):
results.append((d, s))
json_results = []
vid_objs = {}
res_idx = 0
for idx in range(len(self)):
# assume results is ordered
vid_id, fr_id = self.sample_ids[idx]
ref_frame_ids = self._frame_ids[vid_id]
vid_len = len(ref_frame_ids)
for frame_id in range(fr_id, min(fr_id + self.seq_len, vid_len)):
is_last = frame_id == vid_len - 1
det, seg = results[res_idx]
res_idx += 1
for obj_id in det:
bbox = det[obj_id]['bbox']
if obj_id in seg:
segm = seg[obj_id]
label = det[obj_id]['label']
if obj_id not in vid_objs:
vid_objs[obj_id] = {
'scores': [],
'cats': [],
'segms': {}
}
vid_objs[obj_id]['scores'].append(bbox[4])
vid_objs[obj_id]['cats'].append(label)
segm['counts'] = segm['counts'].decode()
vid_objs[obj_id]['segms'][frame_id] = segm
if is_last:
# store results of the current video
for obj_id, obj in vid_objs.items():
data = dict()
data['video_id'] = vid_id
data['score'] = np.array(obj['scores']).mean().item()
# majority voting for sequence category
data['category_id'] = np.bincount(np.array(
obj['cats'])).argmax().item() + 1
vid_seg = []
for fid in range(frame_id + 1):
if fid in obj['segms']:
vid_seg.append(obj['segms'][fid])
else:
vid_seg.append(None)
data['segmentations'] = vid_seg
first = False
json_results.append(data)
vid_objs = {}
return [], json_results
def results2json(self, results, outfile_prefix):
"""Dump the detection results to a json file.
There are 3 types of results: proposals, bbox predictions, mask
predictions, and they have different data types. This method will
automatically recognize the type, and dump them to json files.
Args:
results (list[list | tuple | ndarray]): Testing results of the
dataset.
outfile_prefix (str): The filename prefix of the json files. If the
prefix is "somepath/xxx", the json files will be named
"somepath/xxx.bbox.json", "somepath/xxx.segm.json",
"somepath/xxx.proposal.json".
Returns:
dict[str: str]: Possible keys are "bbox", "segm", "proposal", and
values are corresponding filenames.
"""
result_files = dict()
if isinstance(results[0], list):
json_results = self._det2json(results)
result_files['bbox'] = '{}.{}.json'.format(outfile_prefix, 'bbox')
result_files['proposal'] = '{}.{}.json'.format(
outfile_prefix, 'bbox')
mmcv.dump(json_results, result_files['bbox'])
elif isinstance(results[0], tuple):
json_results = self._segm2json(results)
result_files['bbox'] = '{}.{}.json'.format(outfile_prefix, 'bbox')
result_files['proposal'] = '{}.{}.json'.format(
outfile_prefix, 'bbox')
result_files['segm'] = '{}.{}.json'.format(outfile_prefix, 'segm')
mmcv.dump(json_results[0], result_files['bbox'])
mmcv.dump(json_results[1], result_files['segm'])
elif isinstance(results[0], np.ndarray):
json_results = self._proposal2json(results)
result_files['proposal'] = '{}.{}.json'.format(
outfile_prefix, 'proposal')
mmcv.dump(json_results, result_files['proposal'])
else:
raise TypeError('invalid type of results')
return result_files
def format_results(self, results, jsonfile_prefix=None, **kwargs):
"""Format the results to json (standard format for COCO evaluation).
Args:
results (list): Testing results of the dataset.
jsonfile_prefix (str | None): The prefix of json files. It includes
the file path and the prefix of filename, e.g., "a/b/prefix".
If not specified, a temp file will be created. Default: None.
Returns:
tuple: (result_files, tmp_dir), result_files is a dict containing
the json filepaths, tmp_dir is the temporal directory created
for saving json files when jsonfile_prefix is not specified.
"""
assert isinstance(results, list), 'results must be a list'
'''
assert len(results) == len(self), (
'The length of results is not equal to the dataset len: {} != {}'.
format(len(results), len(self)))
'''
if jsonfile_prefix is None:
tmp_dir = tempfile.TemporaryDirectory()
jsonfile_prefix = osp.join(tmp_dir.name, 'results')
else:
tmp_dir = None
result_files = self.results2json(results, jsonfile_prefix)
return result_files, tmp_dir
def evaluate(self,
results,
metric='bbox',
logger=None,
jsonfile_prefix=None,
classwise=False,
proposal_nums=(100, 300, 1000),
iou_thrs=np.arange(0.5, 0.96, 0.05)):
"""Evaluation in COCO protocol.
Args:
results (list): Testing results of the dataset.
metric (str | list[str]): Metrics to be evaluated.
logger (logging.Logger | str | None): Logger used for printing
related information during evaluation. Default: None.
jsonfile_prefix (str | None): The prefix of json files. It includes
the file path and the prefix of filename, e.g., "a/b/prefix".
If not specified, a temp file will be created. Default: None.
classwise (bool): Whether to evaluating the AP for each class.
proposal_nums (Sequence[int]): Proposal number used for evaluating
recalls, such as recall@100, recall@1000.
Default: (100, 300, 1000).
iou_thrs (Sequence[float]): IoU threshold used for evaluating
recalls. If set to a list, the average recall of all IoUs will
also be computed. Default: 0.5.
Returns:
dict[str: float]
"""
metrics = metric if isinstance(metric, list) else [metric]
allowed_metrics = ['bbox', 'segm', 'proposal', 'proposal_fast']
for metric in metrics:
if metric not in allowed_metrics:
raise KeyError('metric {} is not supported'.format(metric))
result_files, tmp_dir = self.format_results(results, jsonfile_prefix)
eval_results = {}
ytvosGt = self.ytvos
for metric in metrics:
msg = 'Evaluating {}...'.format(metric)
if logger is None:
msg = '\n' + msg
print_log(msg, logger=logger)
if metric == 'proposal_fast':
ar = self.fast_eval_recall(results,
proposal_nums,
iou_thrs,
logger='silent')
log_msg = []
for i, num in enumerate(proposal_nums):
eval_results['AR@{}'.format(num)] = ar[i]
log_msg.append('\nAR@{}\t{:.4f}'.format(num, ar[i]))
log_msg = ''.join(log_msg)
print_log(log_msg, logger=logger)
continue
if metric not in result_files:
raise KeyError('{} is not in results'.format(metric))
try:
ytvosDt = ytvosGt.loadRes(result_files[metric])
except IndexError:
print_log('The testing results of the whole dataset is empty.',
logger=logger,
level=logging.ERROR)
break
iou_type = 'bbox' if metric == 'proposal' else metric
ytvosEval = YTVOSeval(ytvosGt, ytvosDt, iou_type)
vid_ids = self.ytvos.getVidIds()
ytvosEval.params.vidIds = vid_ids
if metric == 'proposal':
ytvosEval.params.useCats = 0
ytvosEval.params.maxDets = list(proposal_nums)
ytvosEval.evaluate()
ytvosEval.accumulate()
ytvosEval.summarize()
metric_items = [
'AR@100', 'AR@300', 'AR@1000', 'AR_s@1000', 'AR_m@1000',
'AR_l@1000'
]
for i, item in enumerate(metric_items):
val = float('{:.3f}'.format(ytvosEval.stats[i + 6]))
eval_results[item] = val
else:
ytvosEval.evaluate()
ytvosEval.accumulate()
ytvosEval.summarize()
if classwise: # Compute per-category AP
pass # TODO
metric_items = [
'mAP', 'mAP_50', 'mAP_75', 'mAP_s', 'mAP_m', 'mAP_l'
]
for i in range(len(metric_items)):
key = '{}_{}'.format(metric, metric_items[i])
val = float('{:.3f}'.format(ytvosEval.stats[i]))
eval_results[key] = val
eval_results['{}_mAP_copypaste'.format(metric)] = (
'{ap[0]:.3f} {ap[1]:.3f} {ap[2]:.3f} {ap[3]:.3f} '
'{ap[4]:.3f} {ap[5]:.3f}').format(ap=ytvosEval.stats[:6])
if tmp_dir is not None:
tmp_dir.cleanup()
return eval_results
class YoutubeVIS(data.Dataset):
"""`YoutubeVIS <https://youtube-vos.org/dataset/vis/>`_ Dataset.
Args:
root (string): Root directory where images are downloaded to.
set_name (string): Name of the specific set of COCO images.
transform (callable, optional): A function/transform that augments the
raw images`
target_transform (callable, optional): A function/transform that takes
in the target (bbox) and transforms it.
prep_crowds (bool): Whether or not to prepare crowds for the evaluation step.
"""
def __init__(self,
image_path,
info_file,
configs,
transform=None,
target_transform=YoutubeVISAnnotationTransform(),
dataset_name='YouTube VIS',
has_gt=True):
# Do this here because we have too many things named COCO
from pycocotools.ytvos import YTVOS
self.root = image_path
self.configs = configs
logger = logging.getLogger("yolact.dataset")
logger.info('Loading annotations into memory...')
tic = time.time()
with contextlib.redirect_stdout(io.StringIO()):
self.coco = YTVOS(info_file)
self.ids = list(self.coco.vidToAnns.keys())
if len(self.ids) == 0 or not has_gt:
self.ids = list(self.coco.vids.keys())
logger.info('{} videos loaded in {:0.2f}s.'.format(
len(self.ids),
time.time() - tic))
self.transform = transform
self.target_transform = target_transform
self.name = dataset_name
self.has_gt = has_gt
def __getitem__(self, index):
"""
Args:
index (int): Index
Returns:
tuple: Tuple (image, (target, masks, num_crowds)).
target is the object returned by ``coco.loadAnns``.
"""
video_frames, extra_data = self.pull_video(index)
video_frames = [(
im,
(gt, masks, num_crowds),
) for im, gt, masks, h, w, num_crowds in video_frames]
return video_frames, extra_data
def pull_video(self,
index,
return_on_failure=False,
full_video=False,
max_images=-1):
"""
Args:
index (int): Index
Returns:
tuple: Tuple (image, target, masks, height, width, crowd).
target is the object returned by ``coco.loadAnns``.
Note that if no crowd annotations exist, crowd will be None
"""
vid_id = self.ids[index]
seq_len = self.configs.images_per_video
# sample vid_id with enough length
while True:
vid = self.coco.loadVids(vid_id)[0]
annot_length = len(vid['file_names'])
if not full_video and annot_length < seq_len:
continue # FIXME: need to set new vid_id right?
vid_name = vid['file_names'][0].split('/')[0]
# Generate target starts.
if self.has_gt:
target = self.coco.vidToAnns[vid_id]
ann_ids = self.coco.getAnnIds(vidIds=vid_id)
# Target has {'segmentation', 'area', iscrowd', 'image_id', 'bboxes', 'category_id'}
target = self.coco.loadAnns(ann_ids)
else:
target = []
# Separate out crowd annotations. These are annotations that signify a large crowd of
# objects of said class, where there is no annotation for each individual object. Both
# during testing and training, consider these crowds as neutral.
crowd = [x for x in target if ('iscrowd' in x and x['iscrowd'])]
target = [
x for x in target if not ('iscrowd' in x and x['iscrowd'])
]
num_crowds = len(crowd)
for x in crowd:
x['category_id'] = -1
# This is so we ensure that all crowd annotations are at the end of the array
target += crowd
# Generate target ends.
# shuffling and sample a small range of video here
if full_video:
annot_idx = np.arange(0, annot_length, 1)
frame_idx = np.asarray([
int(vid['file_names'][idx][-9:-4])
for idx in range(annot_length)
])
if self.configs.use_all_frames:
key_frame_idx = frame_idx
frame_idx = np.arange(frame_idx[0], frame_idx[-1] + 1, 1)
have_annot = np.asarray(
[int(idx in key_frame_idx) for idx in frame_idx])
annot_idx = np.add.accumulate(have_annot) * have_annot - 1
if max_images != -1:
eval_frames = min(max_images, len(frame_idx))
# start_idx = np.random.randint(0, len(frame_idx) - eval_frames + 1)
start_idx = 0
frame_idx = frame_idx[start_idx:start_idx + eval_frames]
annot_idx = annot_idx[start_idx:start_idx + eval_frames]
elif self.configs.use_all_frames:
rand_idx = np.arange(0, annot_length - seq_len)
np.random.shuffle(rand_idx)
direction = 1
if self.configs.all_frame_direction == 'allway':
if np.random.rand() > 0.5: direction *= -1
elif self.configs.all_frame_direction == 'forward':
# Note: forward warping needs to sample a 'previous frame'
direction *= -1
elif self.configs.all_frame_direction == 'backward':
pass
else:
raise ValueError("Unexpected frame direction: %s" %
self.configs.all_frame_direction)
start_idx = rand_idx[0]
if direction < 0:
start_idx += self.configs.images_per_video
start_frame_idx = int(vid['file_names'][start_idx][-9:-4])
annot_idx = [start_idx]
frame_idx = [start_frame_idx]
# if self.configs.images_per_video > 1:
# num_extra_frames = self.configs.images_per_video - 1
# extra_annot_idx = [start_idx + direction * offset_idx
# for offset_idx in range(1, num_extra_frames + 1)]
# extra_frame_idx = [int(vid['file_names'][extra_idx][-9:-4])
# for extra_idx in extra_annot_idx]
#
# annot_idx += extra_annot_idx
# frame_idx += extra_frame_idx
extra_frame_idx = []
extra_annot_idx = []
if self.configs.images_per_video > 0:
offset_lb, offset_ub = self.configs.frame_offset_lb, self.configs.frame_offset_ub
lb, ub = int(vid['file_names'][0][-9:-4]), int(
vid['file_names'][-1][-9:-4])
fidx = frame_idx[-1]
lb, ub = lb - fidx, ub - fidx
if direction == -1:
ub = -offset_lb
lb = max(lb, -offset_ub)
else:
lb = offset_lb
ub = min(ub, offset_ub)
assert lb <= ub + 1, "{}, {}".format(lb, ub)
assert self.configs.frame_offset_multiplier == 1, "frame_offset_multiplier deprecated."
for _ in range(self.configs.images_per_video):
frame_diff = np.random.randint(lb, ub + 1)
ref_idx = fidx + frame_diff
assert int(
vid['file_names'][0][-9:-4]) <= ref_idx <= int(
vid['file_names'][-1]
[-9:-4]), "{} <= {} <= {}".format(
int(vid['file_names'][0][-9:-4]), ref_idx,
int(vid['file_names'][-1][-9:-4]))
# frame_diff = self.configs.frame_offset_multiplier * np.random.randint(self.configs.frame_offset_lb, self.configs.frame_offset_ub + 1)
# ref_idx = np.clip(frame_idx[-1] + frame_diff * direction,
# int(vid['file_names'][0][-9:-4]), int(vid['file_names'][-1][-9:-4]))
extra_frame_idx += [ref_idx]
extra_annot_idx += [-1]
extra_frame_idx = list(sorted(extra_frame_idx, reverse=True))
annot_idx += extra_annot_idx
frame_idx += extra_frame_idx
annot_idx = np.asarray(annot_idx)
frame_idx = np.asarray(frame_idx)
else:
rand_idx = np.arange(0, annot_length - seq_len + 1)
np.random.shuffle(rand_idx)
start_idx = rand_idx[0]
annot_idx = np.arange(start_idx, start_idx + seq_len, 1)
frame_idx = np.asarray(
[int(vid['file_names'][idx][-9:-4]) for idx in annot_idx])
has_targets = all([
self.target_in_frame(target, annot_id, true_on_reference=True)
for annot_id in annot_idx
])
if has_targets: break
if return_on_failure: return None
# print("Not all frame of video %s[%d-%d] has targets, re-selecting video." %
# (vid['file_names'][0].split('/')[0], start_idx, start_idx + frm_len))
index = np.random.randint(len(self))
vid_id = self.ids[index]
frame_results = []
extra_data = []
while True:
try:
for idx, (frame_id, annot_id) in enumerate(
zip(frame_idx.tolist(), annot_idx.tolist())):
extra = {}
# FIXME: little bit hacky for full frames, maybe fix this using annotation files
frame_id_str = "%05d" % frame_id
file_name = vid['file_names'][0]
file_name = file_name[:-9] + frame_id_str + file_name[-4:]
prev_frame_id = frame_idx[idx - 1] if idx > 0 else -1
prev_annot_id = annot_idx[idx - 1] if idx > 0 else -1
if idx == 0:
seeds, (im, gt, masks, h, w,
num_crowds) = self.pull_frame(
vid_name, (frame_id, annot_id),
(prev_frame_id, prev_annot_id),
file_name,
target,
num_crowds,
require_seeds=True)
else:
im, gt, masks, h, w, num_crowds = self.pull_frame(
vid_name, (frame_id, annot_id),
(prev_frame_id, prev_annot_id),
file_name,
target,
num_crowds,
seeds=seeds)
extra['idx'] = (
frame_id,
annot_id,
)
frame_results.append((
im,
gt,
masks,
h,
w,
num_crowds,
))
extra_data.append(extra)
except ValueError as e:
logger = logging.getLogger("yolact.dataset")
logger.warning('Resampling with reseed signal...')
frame_results.clear()
extra_data.clear()
continue
break
return frame_results, extra_data
def __len__(self):
return len(self.ids)
@staticmethod
def target_in_frame(target, frame_id, true_on_reference=False):
if frame_id < 0:
return true_on_reference
if len(target) > 0:
for obj in target:
if obj['segmentations'][frame_id] is not None:
return True
return False
def pull_frame(self,
vid_name,
frame_annot_id,
prev_frame_annot_id,
file_name,
target,
num_crowds,
require_seeds=False,
seeds=None):
frame_id, annot_id = frame_annot_id
prev_frame_id, prev_annot_id = prev_frame_annot_id
path = osp.join(self.root, file_name)
assert osp.exists(path), 'Image path does not exist: {}'.format(path)
img = cv2.imread(path)
height, width, _ = img.shape
target_is_in_frame = self.target_in_frame(target, annot_id)
if target_is_in_frame:
# Pool all the masks for this image into one [num_objects,height,width] matrix
# masks = [np.zeros(height * width, dtype=np.uint8).reshape(-1) if obj['segmentations'][frame_id] is None # all-zero mask on None
# else self.coco.annToMask(obj, frame_id).reshape(-1) for obj in target]
masks = [
self.coco.annToMask(obj, annot_id).reshape(-1)
for obj in target if obj['segmentations'][annot_id] is not None
]
masks = np.vstack(masks)
masks = masks.reshape(-1, height, width)
if self.target_transform is not None and target_is_in_frame:
target = self.target_transform(target, annot_id, width, height)
if self.transform is not None:
if "Video" in type(self.transform).__name__:
if target_is_in_frame:
target = np.array(target)
return_transform = self.transform(
img,
masks,
target[:, :4], {
'num_crowds': num_crowds,
'labels': target[:, 4]
},
require_seeds=require_seeds,
seeds=seeds)
if require_seeds:
seeds, (img, masks, boxes, labels) = return_transform
else:
img, masks, boxes, labels = return_transform
# I stored num_crowds in labels so I didn't have to modify the entirety of augmentations
num_crowds = labels['num_crowds']
labels = labels['labels']
target = np.hstack((boxes, np.expand_dims(labels, axis=1)))
if target.shape[0] == 0:
logger = logging.getLogger("yolact.dataset")
logger.warning(
'Augmentation output an example with no ground truth. Resampling...'
)
raise ValueError("reseed")
else:
try:
return_transform = self.transform(
img,
np.zeros((1, height, width), dtype=np.float),
np.array([[0., 0., 1., 1.]]), {
'num_crowds': 0,
'labels': np.array([0])
},
require_seeds=require_seeds,
seeds=seeds)
except ValueError:
assert False, "Unexpected reseed captured with no-target instances."
if require_seeds:
seeds, (img, _, _, _) = return_transform
else:
img, _, _, _ = return_transform
masks = None
target = None
else:
if target_is_in_frame:
target = np.array(target)
img, masks, boxes, labels = self.transform(
img, masks, target[:, :4], {
'num_crowds': num_crowds,
'labels': target[:, 4]
})
# I stored num_crowds in labels so I didn't have to modify the entirety of augmentations
num_crowds = labels['num_crowds']
labels = labels['labels']
target = np.hstack((boxes, np.expand_dims(labels, axis=1)))
else:
img, _, _, _ = self.transform(
img, np.zeros((1, height, width), dtype=np.float),
np.array([[0, 0, 1, 1]]), {
'num_crowds': 0,
'labels': np.array([0])
})
masks = None
target = None
return_tuple = torch.from_numpy(img).permute(
2, 0, 1), target, masks, height, width, num_crowds
if require_seeds:
return seeds, return_tuple
else:
return return_tuple
def pull_image(self, index):
'''Returns the original image object at index in PIL form
Note: not using self.__getitem__(), as any transformations passed in
could mess up this functionality.
Argument:
index (int): index of img to show
Return:
cv2 img
'''
img_id = self.ids[index]
path = self.coco.loadImgs(img_id)[0]['file_name']
return cv2.imread(osp.join(self.root, path), cv2.IMREAD_COLOR)
def pull_anno(self, index):
'''Returns the original annotation of image at index
Note: not using self.__getitem__(), as any transformations passed in
could mess up this functionality.
Argument:
index (int): index of img to get annotation of
Return:
list: [img_id, [(label, bbox coords),...]]
eg: ('001718', [('dog', (96, 13, 438, 332))])
'''
img_id = self.ids[index]
ann_ids = self.coco.getAnnIds(imgIds=img_id)
return self.coco.loadAnns(ann_ids)
def __repr__(self):
fmt_str = 'Dataset ' + self.__class__.__name__ + '\n'
fmt_str += ' Number of datapoints: {}\n'.format(self.__len__())
fmt_str += ' Root Location: {}\n'.format(self.root)
tmp = ' Transforms (if any): '
fmt_str += '{0}{1}\n'.format(
tmp,
self.transform.__repr__().replace('\n', '\n' + ' ' * len(tmp)))
tmp = ' Target Transforms (if any): '
fmt_str += '{0}{1}'.format(
tmp,
self.target_transform.__repr__().replace('\n',
'\n' + ' ' * len(tmp)))
return fmt_str