def format_track_results(self, results, infos, resfile):
"""Format tracking results."""
results_per_video = []
for frame_id, result in enumerate(results):
outs_track = results2outs(bbox_results=result)
track_ids, bboxes = outs_track['ids'], outs_track['bboxes']
frame_ids = np.full_like(track_ids, frame_id)
results_per_frame = np.concatenate(
(frame_ids[:, None], track_ids[:, None], bboxes), axis=1)
results_per_video.append(results_per_frame)
# `results_per_video` is a ndarray with shape (N, 7). Each row denotes
# (frame_id, track_id, x1, y1, x2, y2, score)
results_per_video = np.concatenate(results_per_video)
if self.interpolate_tracks_cfg is not None:
results_per_video = interpolate_tracks(
results_per_video, **self.interpolate_tracks_cfg)
with open(resfile, 'wt') as f:
for frame_id, info in enumerate(infos):
# `mot_frame_id` is the actually frame id used for evaluation.
# It may not start from 0.
if 'mot_frame_id' in info:
mot_frame_id = info['mot_frame_id']
else:
mot_frame_id = info['frame_id'] + 1
results_per_frame = \
results_per_video[results_per_video[:, 0] == frame_id]
for i in range(len(results_per_frame)):
_, track_id, x1, y1, x2, y2, conf = results_per_frame[i]
f.writelines(
f'{mot_frame_id},{track_id},{x1:.3f},{y1:.3f},' +
f'{(x2-x1):.3f},{(y2-y1):.3f},{conf:.3f},-1,-1,-1\n')
def test_results2outs():
from mmtrack.core import results2outs
num_classes = 3
num_objects = [2, 0, 2]
gt_labels = []
for id, num in enumerate(num_objects):
gt_labels.extend([id for _ in range(num)])
image_size = 100
bbox_results = [
np.random.randint(low=0, high=image_size, size=(num_objects[i], 5))
for i in range(num_classes)
]
bbox_results_with_ids = [
np.random.randint(low=0, high=image_size, size=(num_objects[i], 6))
for i in range(num_classes)
]
mask_results = [[] for i in range(num_classes)]
for cls_id in range(num_classes):
for obj_id in range(num_objects[cls_id]):
mask_results[cls_id].append(
np.random.randint(0, 2, (image_size, image_size)))
# test results2outs without ids
outs = results2outs(
bbox_results=bbox_results,
mask_results=mask_results,
mask_shape=(image_size, image_size))
for key in ['bboxes', 'labels', 'masks']:
assert key in outs
assert outs['bboxes'].shape == (sum(num_objects), 5)
assert (outs['labels'] == np.array(gt_labels)).all()
assert outs['masks'].shape == (sum(num_objects), image_size, image_size)
# test results2outs with ids
outs = results2outs(
bbox_results=bbox_results_with_ids,
mask_results=mask_results,
mask_shape=(image_size, image_size))
for key in ['bboxes', 'labels', 'ids', 'masks']:
assert key in outs
assert outs['bboxes'].shape == (sum(num_objects), 5)
assert (outs['labels'] == np.array(gt_labels)).all()
assert outs['ids'].shape == (sum(num_objects), )
assert outs['masks'].shape == (sum(num_objects), image_size, image_size)
def show_result(self,
img,
result,
score_thr=0.0,
thickness=1,
font_scale=0.5,
show=False,
out_file=None,
wait_time=0,
backend='cv2',
**kwargs):
"""Visualize tracking results.
Args:
img (str | ndarray): Filename of loaded image.
result (dict): Tracking result.
- The value of key 'track_bboxes' is list with length
num_classes, and each element in list is ndarray with
shape(n, 6) in [id, tl_x, tl_y, br_x, br_y, score] format.
- The value of key 'det_bboxes' is list with length
num_classes, and each element in list is ndarray with
shape(n, 5) in [tl_x, tl_y, br_x, br_y, score] format.
thickness (int, optional): Thickness of lines. Defaults to 1.
font_scale (float, optional): Font scales of texts. Defaults
to 0.5.
show (bool, optional): Whether show the visualizations on the
fly. Defaults to False.
out_file (str | None, optional): Output filename. Defaults to None.
backend (str, optional): Backend to draw the bounding boxes,
options are `cv2` and `plt`. Defaults to 'cv2'.
Returns:
ndarray: Visualized image.
"""
assert isinstance(result, dict)
track_bboxes = result.get('track_bboxes', None)
track_masks = result.get('track_masks', None)
if isinstance(img, str):
img = mmcv.imread(img)
outs_track = results2outs(
bbox_results=track_bboxes,
mask_results=track_masks,
mask_shape=img.shape[:2])
img = imshow_tracks(
img,
outs_track.get('bboxes', None),
outs_track.get('labels', None),
outs_track.get('ids', None),
outs_track.get('masks', None),
classes=self.CLASSES,
score_thr=score_thr,
thickness=thickness,
font_scale=font_scale,
show=show,
out_file=out_file,
wait_time=wait_time,
backend=backend)
return img
def __call__(self, results):
outs_det = results2outs(bbox_results=results['detections'])
bboxes = outs_det['bboxes']
labels = outs_det['labels']
results['public_bboxes'] = bboxes[:, :4]
if bboxes.shape[1] > 4:
results['public_scores'] = bboxes[:, -1]
results['public_labels'] = labels
results['bbox_fields'].append('public_bboxes')
return results
def simple_test(self, img, img_metas, rescale=False, **kwargs):
"""Test without augmentations.
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
rescale (bool, optional): If False, then returned bboxes and masks
will fit the scale of img, otherwise, returned bboxes and masks
will fit the scale of original image shape. Defaults to False.
Returns:
dict[str : list(ndarray)]: The tracking results.
"""
frame_id = img_metas[0].get('frame_id', -1)
if frame_id == 0:
self.tracker.reset()
det_results = self.detector.simple_test(
img, img_metas, rescale=rescale)
assert len(det_results) == 1, 'Batch inference is not supported.'
bbox_results = det_results[0]
num_classes = len(bbox_results)
outs_det = results2outs(bbox_results=bbox_results)
det_bboxes = torch.from_numpy(outs_det['bboxes']).to(img)
det_labels = torch.from_numpy(outs_det['labels']).to(img).long()
track_bboxes, track_labels, track_ids = self.tracker.track(
img=img,
img_metas=img_metas,
model=self,
bboxes=det_bboxes,
labels=det_labels,
frame_id=frame_id,
rescale=rescale,
**kwargs)
track_results = outs2results(
bboxes=track_bboxes,
labels=track_labels,
ids=track_ids,
num_classes=num_classes)
det_results = outs2results(
bboxes=det_bboxes, labels=det_labels, num_classes=num_classes)
return dict(
det_bboxes=det_results['bbox_results'],
track_bboxes=track_results['bbox_results'])
def simple_test(self, img, img_metas, rescale=False):
"""Test forward.
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
rescale (bool): whether to rescale the bboxes.
Returns:
dict[str : Tensor]: Track results.
"""
# TODO inherit from a base tracker
assert self.with_track_head, 'track head must be implemented.' # noqa
frame_id = img_metas[0].get('frame_id', -1)
if frame_id == 0:
self.tracker.reset()
x = self.detector.extract_feat(img)
proposal_list = self.detector.rpn_head.simple_test_rpn(x, img_metas)
det_results = self.detector.roi_head.simple_test(
x, proposal_list, img_metas, rescale=rescale)
bbox_results = det_results[0]
num_classes = len(bbox_results)
outs_det = results2outs(bbox_results=bbox_results)
det_bboxes = torch.tensor(outs_det['bboxes']).to(img)
det_labels = torch.tensor(outs_det['labels']).to(img).long()
track_bboxes, track_labels, track_ids = self.tracker.track(
img_metas=img_metas,
feats=x,
model=self,
bboxes=det_bboxes,
labels=det_labels,
frame_id=frame_id)
track_bboxes = outs2results(
bboxes=track_bboxes,
labels=track_labels,
ids=track_ids,
num_classes=num_classes)['bbox_results']
return dict(det_bboxes=bbox_results, track_bboxes=track_bboxes)
def format_bbox_results(self, results, infos, resfile):
"""Format detection results."""
with open(resfile, 'wt') as f:
for res, info in zip(results, infos):
if 'mot_frame_id' in info:
frame = info['mot_frame_id']
else:
frame = info['frame_id'] + 1
outs_det = results2outs(bbox_results=res)
for bbox, label in zip(outs_det['bboxes'], outs_det['labels']):
x1, y1, x2, y2, conf = bbox
f.writelines(
f'{frame},-1,{x1:.3f},{y1:.3f},{(x2-x1):.3f},' +
f'{(y2-y1):.3f},{conf:.3f}\n')
f.close()
def format_track_results(self, results, infos, resfile):
"""Format tracking results."""
with open(resfile, 'wt') as f:
for res, info in zip(results, infos):
if 'mot_frame_id' in info:
frame = info['mot_frame_id']
else:
frame = info['frame_id'] + 1
outs_track = results2outs(bbox_results=res)
for bbox, label, id in zip(outs_track['bboxes'],
outs_track['labels'],
outs_track['ids']):
x1, y1, x2, y2, conf = bbox
f.writelines(
f'{frame},{id},{x1:.3f},{y1:.3f},{(x2-x1):.3f},' +
f'{(y2-y1):.3f},{conf:.3f},-1,-1,-1\n')
def format_results(self,
results,
resfile_path=None,
metrics=['track_segm']):
"""Format the results to a zip file (standard format for YouTube-VIS
Challenge).
Args:
results (dict(list[ndarray])): Testing results of the dataset.
resfile_path (str, optional): Path to save the formatted results.
Defaults to None.
metrics (list[str], optional): The results of the specific metrics
will be formatted. Defaults to ['track_segm'].
Returns:
tuple: (resfiles, tmp_dir), resfiles is the path of the result
json file, tmp_dir is the temporal directory created for saving
files.
"""
assert isinstance(results, dict), 'results must be a dict.'
if isinstance(metrics, str):
metrics = [metrics]
assert 'track_segm' in metrics
if resfile_path is None:
tmp_dir = tempfile.TemporaryDirectory()
resfile_path = tmp_dir.name
else:
tmp_dir = None
resfiles = osp.join(resfile_path, 'results.json')
inds = [i for i, _ in enumerate(self.data_infos) if _['frame_id'] == 0]
num_vids = len(inds)
assert num_vids == len(self.vid_ids)
inds.append(len(self.data_infos))
vid_infos = self.coco.load_vids(self.vid_ids)
json_results = []
for i in range(num_vids):
video_id = vid_infos[i]['id']
# collect data for each instances in a video.
collect_data = dict()
for frame_id, (bbox_res, mask_res) in enumerate(
zip(results['track_bboxes'][inds[i]:inds[i + 1]],
results['track_masks'][inds[i]:inds[i + 1]])):
outs_track = results2outs(bbox_results=bbox_res)
bboxes = outs_track['bboxes']
labels = outs_track['labels']
ids = outs_track['ids']
masks = mmcv.concat_list(mask_res)
assert len(masks) == len(bboxes)
for i, id in enumerate(ids):
if id not in collect_data:
collect_data[id] = dict(
category_ids=[], scores=[], segmentations=dict())
collect_data[id]['category_ids'].append(labels[i])
collect_data[id]['scores'].append(bboxes[i][4])
if isinstance(masks[i]['counts'], bytes):
masks[i]['counts'] = masks[i]['counts'].decode()
collect_data[id]['segmentations'][frame_id] = masks[i]
# transform the collected data into official format
for id, id_data in collect_data.items():
output = dict()
output['video_id'] = video_id
output['score'] = np.array(id_data['scores']).mean().item()
# majority voting for sequence category
output['category_id'] = np.bincount(
np.array(id_data['category_ids'])).argmax().item() + 1
output['segmentations'] = []
for frame_id in range(inds[i + 1] - inds[i]):
if frame_id in id_data['segmentations']:
output['segmentations'].append(
id_data['segmentations'][frame_id])
else:
output['segmentations'].append(None)
json_results.append(output)
mmcv.dump(json_results, resfiles)
# zip the json file in order to submit to the test server.
zip_file_name = osp.join(resfile_path, 'submission_file.zip')
zf = zipfile.ZipFile(zip_file_name, 'w', zipfile.ZIP_DEFLATED)
print_log(f"zip the 'results.json' into '{zip_file_name}', "
'please submmit the zip file to the test server')
zf.write(resfiles, 'results.json')
zf.close()
return resfiles, tmp_dir