def roi_propagation(vid_proto,
box_proto,
net,
det_fun=im_detect,
scheme='max',
length=None,
sample_rate=1,
offset=0,
cls_indices=None,
keep_feat=False,
batch_size=1024):
track_proto = {}
track_proto['video'] = vid_proto['video']
track_proto['method'] = 'roi_propagation'
max_frame = vid_proto['frames'][-1]['frame']
if not length: length = max_frame
tracks = _box_proto_to_track(box_proto, max_frame, length, sample_rate,
offset)
for idx, frame in enumerate(vid_proto['frames'], start=1):
# Load the demo image
image_name = frame_path_at(vid_proto, frame['frame'])
im = imread(image_name)
# Detect all object classes and regress object bounds
# extract rois on the current frame
rois, track_index = _cur_rois(tracks, frame['frame'])
if len(rois) == 0: continue
timer = Timer()
timer.tic()
# scores: n x c, boxes: n x (c x 4)
scores, boxes, features = _batch_im_detect(net, im, rois, det_fun,
batch_size)
if not keep_feat:
features = None
if cls_indices is not None:
boxes = boxes[:, cls_indices, :]
scores = scores[:, cls_indices]
# scores normalization
scores = scores / np.sum(scores, axis=1, keepdims=True)
# propagation schemes
pred_boxes = score_guided_box_merge(scores, boxes, scheme)
# update track bbox
_update_track(tracks, boxes, pred_boxes, scores, features, track_index,
frame['frame'])
timer.toc()
print('Frame {}: Detection took {:.3f}s for '
'{:d} object proposals').format(frame['frame'], timer.total_time,
len(rois))
track_proto['tracks'] = tracks
return track_proto
def show_tracks(vid_proto, track_proto):
for frame in vid_proto['frames']:
img = imread(frame_path_at(vid_proto, frame['frame']))
boxes = [track_box_at_frame(tracklet, frame['frame']) \
for tracklet in track_proto['tracks']]
tracked = add_bbox(img, boxes, None, None, 2)
cv2.imshow('tracks', tracked)
if cv2.waitKey(0) == ord('q'):
cv2.destroyAllWindows()
sys.exit(0)
cv2.destroyAllWindows()
def show_track_res(track_res, vid_proto):
cv2.namedWindow('tracks')
for frame_res in track_res:
if frame_res['frame'] == -1: break
frame = frame_res['frame']
img = imread(frame_path_at(vid_proto, frame))
boxes = frame_res['roi'].tolist()
tracked = add_bbox(img, boxes, None, None, 2)
cv2.imshow('tracks', tracked)
if cv2.waitKey(0) == ord('q'):
cv2.destroyAllWindows()
sys.exit(0)
cv2.destroyAllWindows()
def track_propagation(vid_proto,
track_proto,
net,
det_fun=im_detect,
cls_indices=None,
keep_feat=False,
batch_size=1024):
new_track_proto = {}
new_track_proto['video'] = vid_proto['video']
new_track_proto['method'] = 'track_propagation'
tracks = copy.copy(track_proto['tracks'])
for idx, frame in enumerate(vid_proto['frames'], start=1):
# Load the demo image
image_name = frame_path_at(vid_proto, frame['frame'])
im = imread(image_name)
# Detect all object classes and regress object bounds
# extract rois on the current frame
rois, track_index = _cur_rois(tracks, frame['frame'])
if len(rois) == 0: continue
timer = Timer()
timer.tic()
# scores: n x c, boxes: n x (c x 4)
scores, boxes, features = _batch_im_detect(net, im, rois, det_fun,
batch_size)
if not keep_feat:
features = None
if cls_indices is not None:
scores = scores[:, cls_indices]
# scores normalization
scores = scores / np.sum(scores, axis=1, keepdims=True)
# update track scores and boxes
_update_track_scores_boxes(tracks, scores, boxes, features,
track_index, frame['frame'])
timer.toc()
print('Frame {}: Detection took {:.3f}s for '
'{:d} object proposals').format(frame['frame'], timer.total_time,
len(rois))
new_track_proto['tracks'] = tracks
return new_track_proto
def naive_box_regression(net_rpn,
net_no_rpn,
vid_proto,
scheme='max',
class_idx=None):
"""Generating tubelet proposals based on the region proposals of first frame."""
track_proto = {}
track_proto['video'] = vid_proto['video']
track_proto['method'] = 'naive_box_regression'
tracks = []
pred_boxes = None
for idx, frame in enumerate(vid_proto['frames'], start=1):
# Load the demo image
image_name = frame_path_at(vid_proto, frame['frame'])
im = imread(image_name)
# Detect all object classes and regress object bounds
timer = Timer()
timer.tic()
if idx == 1:
scores, boxes = im_detect(net_rpn, im, pred_boxes)
else:
scores, boxes = im_detect(net_no_rpn, im, pred_boxes)
boxes = boxes.reshape((boxes.shape[0], -1, 4))
if scheme is 'mean' or idx == 1:
# use mean regressions as predictios
pred_boxes = np.mean(boxes, axis=1)
elif scheme is 'max':
# use the regressions of the class with the maximum probability
# excluding __background__ class
max_cls = scores[:, 1:].argmax(axis=1) + 1
pred_boxes = boxes[np.arange(len(boxes)), max_cls, :]
else:
# use class specific regression as predictions
pred_boxes = boxes[:, class_idx, :]
_append_boxes(tracks, frame['frame'], pred_boxes, scores)
timer.toc()
print('Detection took {:.3f}s for '
'{:d} object proposals').format(timer.total_time, boxes.shape[0])
track_proto['tracks'] = tracks
return track_proto
vid_name, frame_idx = frame_name.split('/')
frame_idx = int(frame_idx) # 0-based
need_propagate = (frame_idx % args.sample_rate == 0)
if (global_idx + 1) % 1000 == 0:
end_time = time.time()
print "{} frames processed: {} s".format(
global_idx + 1, end_time - start_time)
start_time = time.time()
if not need_propagate or frame_det.shape[0] == 0: continue
# read optical flows
# rgb is reversed to bgr when using opencv
flow_file = os.path.join(args.flow_dir, frame_name + '.png')
optflow = imread(flow_file)[:, :, ::-1]
x_map = optflow_transform(optflow[:, :, 0])
y_map = optflow_transform(optflow[:, :, 1])
n_row, n_col = x_map.shape
# compute motion shift
boxes = frame_det[:, :4]
scores = frame_det[:, [4]]
num_boxes = boxes.shape[0]
box_avg_x = _boxes_average_sum(x_map, boxes)
box_avg_x = box_avg_x.reshape((num_boxes, 1))
box_avg_y = _boxes_average_sum(y_map, boxes)
box_avg_y = box_avg_y.reshape((num_boxes, 1))
motion_shift = np.concatenate(
(box_avg_x, box_avg_y, box_avg_x, box_avg_y), axis=1)
parser.add_argument('--top_k', default=10, type=int)
parser.add_argument('--no_nms', action='store_false', dest='nms')
parser.set_defaults(nms=True)
args = parser.parse_args()
vid_proto = proto_load(args.vid_file)
if args.save_dir and not os.path.isdir(args.save_dir):
os.mkdir(args.save_dir)
cls_index = imagenet_vdet_class_idx[args.cls]
for frame in vid_proto['frames']:
det_file = os.path.join(
args.det_root, "{}.mat".format(os.path.splitext(frame['path'])[0]))
det = sio.loadmat(det_file)
frame_idx = frame['frame']
img = imread(frame_path_at(vid_proto, frame_idx))
boxes = det['boxes'][:, cls_index, :].astype('single')
scores = det['zs'][:, cls_index].astype('single')
if args.nms:
keep = nms(np.hstack((boxes, scores[:, np.newaxis])), 0.3)
else:
keep = range(len(boxes))
kept_boxes = [boxes[i, :] for i in keep]
kept_scores = [scores[i] for i in keep]
top_idx = np.argsort(np.asarray(kept_scores))[::-1]
top_boxes = [kept_boxes[top_idx[i]] for i in \
xrange(min(args.top_k, len(kept_boxes)))]
top_scores = [kept_scores[top_idx[i]] for i in \
xrange(min(args.top_k, len(kept_boxes)))]
det_img = add_bbox(img, top_boxes, top_scores)
cv2.imshow('detection', det_img)
cls_boxes = boxes[inds, j * 4:(j + 1) * 4]
cls_dets = np.hstack((cls_boxes, cls_scores[:, np.newaxis])) \
.astype(np.float32, copy=False)
keep = nms(cls_dets, 0.3, force_cpu=True)
for keep_id in keep:
kept_track_ids.append(track_ids[inds[keep_id]])
kept_class.append(j)
colors = unique_colors(len(kept_track_ids))
kept_tracks = [tracks[i] for i in kept_track_ids]
idx = 0
while True:
frame = vid_proto['frames'][idx]
frame_id = frame['frame']
print "Frame id: {}".format(frame_id)
img = imread(frame_path_at(vid_proto, frame['frame']))
boxes = []
scores = []
show_track_ids = []
cur_colors = []
cur_classes = []
for track_id, (class_id,
track) in enumerate(zip(kept_class, kept_tracks)):
if frame_id in track['frame']:
boxes.append(track[args.box_key][track['frame'] == frame_id][
0, class_id, :].tolist())
scores.append(track[args.score_key][track['frame'] == frame_id]
[0, class_id].tolist())
cur_colors.append(colors[track_id])
cur_classes.append(imagenet_vdet_classes[class_id])
show_track_ids.append(track_id)
def sequence_roi_propagation(vid_proto,
box_proto,
net,
det_fun=sequence_im_detect,
window=2,
scheme='max',
length=None,
sample_rate=1,
offset=0,
keep_feat=False,
batch_size=1024):
track_proto = {}
track_proto['video'] = vid_proto['video']
track_proto['method'] = 'sequence_roi_propagation'
max_frame = vid_proto['frames'][-1]['frame']
if not length: length = max_frame
tracks = _box_proto_to_track(box_proto, max_frame, length, sample_rate,
offset)
track_anchors = sorted(set([track[0]['frame'] for track in tracks]))
sequence_frames = _sequence_frames(vid_proto, window, track_anchors,
length)
for idx, frames in enumerate(sequence_frames, start=1):
# Load the demo image
images = map(lambda x: imread(frame_path_at(vid_proto, x['frame'])),
frames)
# Detect all object classes and regress object bounds
# extract rois on the current frame
rois, track_index = _cur_rois(tracks, frames[0]['frame'])
if len(rois) == 0: continue
timer = Timer()
timer.tic()
# scores: n x 2, boxes: n x ((len-1) x 4), features: n x (len x f)
scores, boxes, features = _batch_sequence_im_detect(
net, images, rois, det_fun, batch_size)
if not keep_feat:
features = None
# update track bbox
boxes = boxes.reshape((len(rois), len(images) - 1, 4))
if keep_feat:
features = features.reshape((len(rois), len(images), -1))
frame_ids = [frame['frame'] for frame in frames]
prev_id = -1
for i in xrange(len(images)):
frame_id = frames[i]['frame']
# stop when encounting duplicate frames
if frame_id == prev_id:
break
prev_id = frame_id
if i == 0:
_update_track_by_key(tracks, 'bbox', rois, track_index,
frame_id)
else:
# minus 1 because boxes[0] correspond to the second frame
_update_track_by_key(tracks, 'bbox', boxes[:,
i - 1, :].tolist(),
track_index, frame_id)
_update_track_by_key(tracks, 'roi', boxes[:,
i - 1, :].tolist(),
track_index, frame_id)
if keep_feat:
_update_track_by_key(tracks, 'feature',
features[:, i, :].tolist(), track_index,
frame_id)
timer.toc()
print(
'Frame {}-{}: Detection took {:.3f}s for '
'{:d} object proposals').format(frame_ids[0], frame_ids[-1],
timer.total_time, len(rois))
track_proto['tracks'] = tracks
return track_proto
def roi_train_propagation(vid_proto,
box_proto,
net,
det_fun=im_detect,
cls_indices=None,
scheme='weighted',
num_tracks=16,
length=20,
fg_ratio=None,
batch_size=16):
assert vid_proto['video'] == box_proto['video']
# calculate the number of boxes on each frame
all_boxes = {}
for frame in vid_proto['frames']:
frame_id = frame['frame']
boxes = boxes_at_frame(box_proto, frame_id)
if len(boxes) >= num_tracks: all_boxes[frame_id] = boxes
try:
st_frame = random.choice(all_boxes.keys())
except:
raise ValueError('{} has not valid frames for tracking.'.format(
vid_proto['video']))
st_boxes = _sample_boxes(all_boxes[st_frame], num_tracks, fg_ratio)
results = [{'frame': -1} for i in xrange(length)]
anchor = 0
for frame in vid_proto['frames']:
frame_id = frame['frame']
if frame_id < st_frame: continue
if anchor >= length: break
res = results[anchor]
res['frame'] = frame_id
if anchor == 0:
res['roi'] = np.asarray([st_box['bbox'] for st_box in st_boxes])
# Load the demo image
image_name = frame_path_at(vid_proto, frame_id)
im = imread(image_name)
# Detect all object classes and regress object bounds
# extract rois on the current frame
rois = res['roi']
assert rois.shape[0] == num_tracks
timer = Timer()
timer.tic()
# scores: n x c, boxes: n x (c x 4), features: n * c
scores, boxes, features = _batch_im_detect(net, im, rois, det_fun,
batch_size)
if cls_indices is not None:
boxes = boxes[:, cls_indices, :]
scores = scores[:, cls_indices]
# scores normalization
scores = scores / np.sum(scores, axis=1, keepdims=True)
# propagation schemes
pred_boxes = score_guided_box_merge(scores, boxes, scheme)
results[anchor]['bbox'] = boxes
results[anchor]['feat'] = features
if anchor + 1 < length:
results[anchor + 1]['roi'] = pred_boxes
anchor += 1
return results
import cv2
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('vid_file')
parser.add_argument('annot_file')
parser.add_argument('--save_dir', default=None)
args = parser.parse_args()
vid_proto = proto_load(args.vid_file)
annot_proto = proto_load(args.annot_file)
colors = unique_colors(len(annot_proto['annotations']))
for frame in vid_proto['frames']:
img = imread(frame_path_at(vid_proto, frame['frame']))
boxes = [track_box_at_frame(tracklet, frame['frame']) \
for tracklet in [annot['track'] for annot in annot_proto['annotations']]]
tracked = add_bbox(img, boxes, None, 10)
if args.save_dir:
if not os.path.isdir(args.save_dir):
os.makedirs(args.save_dir)
imwrite(os.path.join(args.save_dir, "{:04d}.jpg".format(frame['frame'])),
tracked)
else:
cv2.imshow('tracks', tracked)
if cv2.waitKey(0) == ord('q'):
cv2.destroyAllWindows()
sys.exit(0)
cv2.destroyAllWindows()
