def get_background_model(video: Video,
train_stop_frame: int,
total_frames: int = None,
pixel_value: PixelValue = PixelValue.GRAY,
disable_tqdm=False) -> (np.ndarray, np.ndarray):
background_list = None
i = 0
for im in tqdm(video.get_frames(0, train_stop_frame),
total=total_frames,
file=sys.stdout,
desc='Training model...',
disable=disable_tqdm):
if background_list is None:
background_list = np.zeros(
(im.shape[0], im.shape[1], train_stop_frame), dtype=np.int16)
if pixel_value == PixelValue.GRAY:
background_list[:, :, i] = np.mean(im, axis=-1)
elif PixelValue.HSV:
background_list[:, :, i] = cv2.cvtColor(im,
cv2.COLOR_BGR2HSV)[:, :, 0]
else:
raise Exception
i += 1
if pixel_value == PixelValue.GRAY:
background_mean = np.mean(background_list, axis=-1) / 255
background_std = np.std(background_list, axis=-1) / 255
elif PixelValue.HSV:
background_mean = np.mean(background_list, axis=-1) / 180
background_std = np.std(background_list, axis=-1) / 180
else:
raise Exception
return background_mean, background_std
def gaussian_model(video: Video,
frame_start: int,
background_mean: np.ndarray,
background_std: np.ndarray,
alpha: float = 2.5,
pixel_value: PixelValue = PixelValue.GRAY,
total_frames: int = None,
disable_tqdm=False) -> Iterator[np.ndarray]:
for im in tqdm(video.get_frames(frame_start),
total=total_frames,
file=sys.stdout,
desc="Non-adaptive gaussian model...",
disable=disable_tqdm):
if pixel_value == PixelValue.GRAY:
im_values = np.mean(im, axis=-1) / 255
elif PixelValue.HSV:
im_values = cv2.cvtColor(im, cv2.COLOR_BGR2HSV)[:, :, 0] / 180
else:
raise Exception
mask = (np.abs(im_values) - background_mean) >= (alpha *
(background_std +
(5 / 255)))
yield im, mask.astype(np.uint8) * 255
def gaussian_model_adaptive(video: Video,
train_stop_frame: int,
background_mean: np.ndarray,
background_std: np.ndarray,
alpha: float = 2.5,
rho: float = 0.1,
pixel_value: PixelValue = PixelValue.GRAY,
total_frames: int = None,
disable_tqdm=False) -> Iterator[np.ndarray]:
for im in tqdm(video.get_frames(train_stop_frame),
total=total_frames,
file=sys.stdout,
desc='Adaptive gaussian model...',
disable=disable_tqdm):
if pixel_value == PixelValue.GRAY:
im_values = np.mean(im, axis=-1) / 255
elif PixelValue.HSV:
im_values = cv2.cvtColor(im, cv2.COLOR_BGR2HSV)[:, :, 0] / 180
else:
raise Exception
mask = (np.abs(im_values) -
background_mean) >= (alpha * (background_std + 5 / 255))
background_mean = rho * im_values + (1 - rho) * background_mean
background_std = np.sqrt(rho *
np.power((im_values - background_mean), 2) +
(1 - rho) * np.power(background_std, 2))
yield im, mask.astype(np.uint8) * 255
def stabilization(optical_flow_method, debug: bool = False, **kwargs):
"""
Perform video stabilization using the given optical flow method.
Idea: test some metric using a known logo. Using ORB matching we could detect if it moves.
:param optical_flow_method: the optical flow method to use
:param debug: whether to show debug plots
"""
video = Video('../datasets/stabilization/piano')
feature_params = dict(maxCorners=500,
qualityLevel=0.3,
minDistance=7,
blockSize=7)
previous_frame = None
accum_flow = np.zeros(2)
count = 0
for i, frame in tqdm(enumerate(video.get_frames()),
total=len(video),
file=sys.stdout):
rows, cols, _ = frame.shape
if previous_frame is not None:
if i % 4 == 0:
p0 = cv2.goodFeaturesToTrack(cv2.cvtColor(
previous_frame, cv2.COLOR_BGR2GRAY),
mask=None,
**feature_params)
flow = optical_flow_method(previous_frame, frame, p0)
if debug:
show_optical_flow_arrows(previous_frame, flow)
m = np.mean(flow[np.logical_or(flow[:, :, 0] != 0,
flow[:, :, 1] != 0)],
axis=(0, 1))
if not np.isnan(accum_flow).any():
accum_flow += -m
transform = np.float32([[1, 0, accum_flow[0]],
[0, 1, accum_flow[1]]])
frame2 = cv2.warpAffine(frame, transform, (cols, rows))
if debug:
plt.figure()
plt.imshow(cv2.cvtColor(frame2, cv2.COLOR_BGR2RGB))
plt.axis('off')
plt.show()
cv2.imwrite("../video/block/OrigianlFrame%04d.jpg" % count,
frame) # save frame as JPEG file
cv2.imwrite("../video/block/StabilizedFrame%04d.jpg" % count,
frame2) # save frame as JPEG file
count += 1
previous_frame = frame
def week2_soa(video: Video, debug=False) -> Iterator[Frame]:
th = 150
frame_id = 0
fgbg = cv.createBackgroundSubtractorMOG2()
ground_truth = read_detections(
'../datasets/AICity_data/train/S03/c010/gt/gt.txt')
roi = cv.cvtColor(
cv.imread('../datasets/AICity_data/train/S03/c010/roi.jpg'),
cv.COLOR_BGR2GRAY)
for im in tqdm(video.get_frames(),
total=2141,
file=sys.stdout,
desc='Training model...'):
mask = fgbg.apply(im)
mask[mask < th] = 0
mask.astype(np.uint8) * 255
mask = mask & roi
mask = opening(mask, 5)
# cv.imshow('f', mask)
# cv.waitKey()
mask = closing(mask, 25)
# cv.imshow('f', mask)
# cv.waitKey()
mask, detections = find_boxes(mask)
frame = Frame(frame_id)
frame.detections = detections
frame.ground_truth = ground_truth[frame_id]
frame_id += 1
yield im, mask, frame
def week2_soa_mod(video: Video, debug=False) -> Iterator[Frame]:
th = 150
fgbg = cv.createBackgroundSubtractorMOG2()
for im, frame in tqdm(video.get_frames(int(2141 * 0.25)),
total=int(2141 * 0.25) * 0.75,
file=sys.stdout,
desc='Training model...'):
fgmask = fgbg.apply(im)
fgmask[fgmask < th] = 0
kernel_e = np.ones((5, 5), np.uint8)
kernel_d = np.ones((9, 9), np.uint8)
diag = np.identity(5)
t_diag = np.flip(diag, 0)
kernel_d2 = np.uint8(np.logical_or(diag, t_diag))
fgmask = cv.erode(fgmask, kernel_e)
fgmask = cv.dilate(fgmask, kernel_d)
fgmask = cv.dilate(fgmask, kernel_d2)
cv.imshow('frame', fgmask)
k = cv.waitKey(30) & 0xff
if k == 27:
break
cv.destroyAllWindows()
def main():
video = Video("../datasets/AICity_data/train/S03/c010/vdo.avi")
gt = read_annotations('../annotations', start_frame, end_frame)
"""
DETECTIONS
"""
det_algs = ['yolo3', 'mask_rcnn', 'ssd512']
for alg in det_algs:
detections = read_detections(
'../datasets/AICity_data/train/S03/c010/det/det_{0}.txt'.format(
alg))
detections = detections[start_frame:end_frame + 1]
frames = []
# roi = cv2.imread('../datasets/AICity_data/train/S03/c010/roi.jpg')
for im, f in seq(video.get_frames(
start_frame_number=start_frame)).take(end_frame - start_frame +
1):
f.ground_truth = gt[f.id]
f.detections = detections[f.id]
frames.append(f)
if make_video:
make_video_frame(im, f, frames)
iou_over_time(frames)
mAP = mean_average_precision(frames)
print(alg, " mAP:", mAP)
"""
DETECTIONS FROM ALTERED GROUND TRUTH
"""
frames = []
for im, f in seq(video.get_frames()).take(end_frame - start_frame + 1):
f.ground_truth = gt[f.id]
f.detections = alter_detections(f.ground_truth)
frames.append(f)
if make_video:
make_video_frame(im, f, frames)
iou_over_time(frames)
mAP = mean_average_precision(frames)
print('Random alteration', " mAP:", mAP)
"""
OPTICAL FLOW
"""
of_det_1 = read_optical_flow(
'../datasets/optical_flow/detection/LKflow_000045_10.png')
of_det_2 = read_optical_flow(
'../datasets/optical_flow/detection/LKflow_000157_10.png')
of_gt_1 = read_optical_flow('../datasets/optical_flow/gt/000045_10.png')
of_gt_2 = read_optical_flow('../datasets/optical_flow/gt/000157_10.png')
img_1 = cv2.imread('../datasets/optical_flow/img/000045_10.png')
img_2 = cv2.imread('../datasets/optical_flow/img/000157_10.png')
msen_of = msen(of_det_2, of_gt_2)
pepn_of = pepn(of_det_2, of_gt_2)
print(msen_of, pepn_of)
show_optical_flow(of_gt_1)
show_optical_flow_arrows(img_1, of_gt_1)
msen_45 = msen(of_det_1, of_gt_1, plot=True)
pepn_45 = pepn(of_det_1, of_gt_1)
print("Sequence 045: MSEN", msen_45, "PEPN", pepn_45)
msen_157 = msen(of_det_2, of_gt_2, plot=True)
pepn_157 = pepn(of_det_2, of_gt_2)
print("Sequence 157: MSEN", msen_157, "PEPN", pepn_157)
show_optical_flow(of_gt_1)
def off_the_shelf_yolo(tracking, debug=False, *args, **kwargs):
video = Video("../datasets/AICity_data/train/S03/c010/frames")
detection_transform = DetectionTransform()
classes = utils.load_classes('../config/coco.names')
gt = read_annotations(
'../datasets/AICity_data/train/S03/c010/m6-full_annotation.xml')
model = Darknet('../config/yolov3.cfg')
model.load_weights('../weights/fine_tuned_yolo_freeze.weights')
if torch.cuda.is_available():
model = model.cuda()
frames = []
last_im = None
model.eval()
with torch.no_grad():
for i, im in tqdm(enumerate(video.get_frames(start=len(video) // 4)),
total=len(video),
file=sys.stdout,
desc='Yolo'):
im_tensor = detection_transform(im)
im_tensor = im_tensor.view((-1, ) + im_tensor.size())
if torch.cuda.is_available():
im_tensor = im_tensor.cuda()
detections = model.forward(im_tensor)
detections = utils.non_max_suppression(detections,
80,
conf_thres=.6,
nms_thres=0.3)
frame = Frame(i + (len(video) // 4))
frame.ground_truth = gt[frame.id]
for d in detections[0]:
if int(d[6]) in VALID_LABELS:
bbox = d.cpu().numpy()
det = Detection(-1,
classes[int(d[6])], (bbox[0], bbox[1]),
width=bbox[2] - bbox[0],
height=bbox[3] - bbox[1],
confidence=d[5])
detection_transform.unshrink_detection(det)
frame.detections.append(det)
if tracking is not None:
last_frame = None if len(frames) == 0 else frames[-1]
tracking(frame=frame,
im=im,
last_frame=last_frame,
last_im=last_im,
frames=frames,
debug=False)
frames.append(frame)
last_im = im
if debug:
plt.figure()
for det in frame.detections:
rect = patches.Rectangle(det.top_left,
det.width,
det.height,
linewidth=2,
edgecolor='blue',
facecolor='none')
plt.gca().add_patch(rect)
if tracking is None:
text = '{}'.format(det.label)
else:
text = '{} ~ {}'.format(det.label, det.id)
plt.text(det.top_left[0],
det.top_left[1],
s=text,
color='white',
verticalalignment='top',
bbox={
'color': 'blue',
'pad': 0
})
plt.imshow(im)
plt.axis('off')
# plt.savefig('../video/video_yolo_fine_tune_good/frame_{:04d}'.format(i))
plt.show()
plt.close()
# iou_over_time(frames)
mAP = mean_average_precision(frames)
print("YOLO mAP:", mAP)
def off_the_shelf_ssd(tracking, debug=False, **kwargs):
if cuda.is_available():
torch.set_default_tensor_type('torch.cuda.FloatTensor')
gt = read_annotations(
'../datasets/AICity_data/train/S03/c010/m6-full_annotation.xml')
video = Video("../datasets/AICity_data/train/S03/c010/frames")
trans = transforms.Compose(
[transforms.Resize((300, 300)),
transforms.ToTensor()])
labels = ( # always index 0
'aeroplane', 'bicycle', 'bird', 'boat', 'bottle', 'bus', 'car', 'cat',
'chair', 'cow', 'diningtable', 'dog', 'horse', 'motorbike', 'person',
'pottedplant', 'sheep', 'sofa', 'train', 'tvmonitor')
model = build_ssd('test', 300, 21) # initialize SSD
model.load_weights('../weights/ssd300_mAP_77.43_v2.pth')
if torch.cuda.is_available():
model = model.cuda()
frames = []
model.eval()
with torch.no_grad():
for i, im in enumerate(video.get_frames()):
im_tensor = trans(im)
im_tensor = im_tensor.view((-1, ) + im_tensor.size())
if torch.cuda.is_available():
im_tensor = im_tensor.cuda()
output = model.forward(im_tensor)
detections = output.data
w = im.width
h = im.height
frame = Frame(i)
frame.ground_truth = gt[frame.id]
# skip j = 0, because it's the background class
for j in (2, 6, 7, 14):
dets = detections[0, j, :]
mask = dets[:, 0].gt(0.).expand(5, dets.size(0)).t()
dets = torch.masked_select(dets, mask).view(-1, 5)
if dets.size(0) == 0:
continue
boxes = dets[:, 1:]
scores = dets[:, 0].cpu().numpy()
cls_dets = np.hstack((boxes.cpu().numpy(),
scores[:,
np.newaxis])).astype(np.float32,
copy=False)
for cls_det in cls_dets:
x1 = int(w * cls_det[0])
y1 = int(h * cls_det[1])
det = Detection(-1,
labels[j - 1], (x1, y1),
width=w * (cls_det[2] - cls_det[0]),
height=h * (cls_det[3] - cls_det[1]),
confidence=cls_det[4])
frame.detections.append(det)
# kalman(frame)
if tracking is not None:
tracking(frame, frames, debug=debug)
frames.append(frame)
if debug:
plt.figure()
for det in frame.detections:
rect = patches.Rectangle(det.top_left,
det.width,
det.height,
linewidth=2,
edgecolor='blue',
facecolor='none')
plt.gca().add_patch(rect)
plt.text(det.top_left[0],
det.top_left[1],
s='{} ~ {}'.format(det.label, det.id),
color='white',
verticalalignment='top',
bbox={
'color': 'blue',
'pad': 0
})
plt.imshow(im)
plt.axis('off')
# plt.savefig('../video/video_ssd_KalmanID/frame_{:04d}'.format(i))
plt.show()
plt.close()
#iou_over_time(frames)
mAP = mean_average_precision(frames)
print("SSD mAP:", mAP)