def __init__(self, hparams, dbg=False):
'''
Pytorch lightning module for training goturn tracker.
@hparams: all the argparse arguments for training
@dbg: boolean for switching on visualizer
'''
logger.info('=' * 15)
logger.info('GOTURN TRACKER')
logger.info('=' * 15)
super(GoturnTrain, self).__init__()
self.__set_seed(hparams.seed)
self.hparams = hparams
logger.info('Setting up the network...')
# network with pretrained model
if not self.hparams.finetune:
self._model = GoturnNetwork(self.hparams.pretrained_model)
else:
self._model = GoturnNetwork()
checkpoint = torch.load(
self.hparams.pretrained_model)['state_dict']
checkpoint = self.load_model_param(checkpoint)
self._model.load_state_dict(checkpoint, strict=False)
self._dbg = dbg
if dbg:
self._viz = Visualizer(port=8097)
def __init__(self,
imgs_dir,
ann_dir,
isTrain=True,
val_ratio=0.2,
dbg=False):
'''
loading video frames and annotation from alov
@imgs_dir: alov video frames directory
@ann_dir: annotations path
@isTrain: True: Training, False: validation
@val_ratio: validation data ratio
@dbg: For visualization
'''
if not Path(imgs_dir).is_dir():
logger.error('{} is not a valid directory'.format(imgs_dir))
self._imgs_dir = Path(imgs_dir)
self._ann_dir = Path(ann_dir)
self._cats = {}
self._isTrain = isTrain
self._val_ratio = val_ratio
self.__loaderAlov()
self._alov_imgpairs = []
self._alov_vids = self.__get_videos(self._isTrain, self._val_ratio)
self.__parse_all() # get all the image pairs in a list
self._dbg = dbg
if dbg:
self._env = 'Alov'
self._viz = Visualizer(env=self._env)
def __init__(self, args, dbg=False):
"""load model """
loader = loadfromfolder(args.input)
self._vid_frames = loader.get_video_frames()
model_dir = Path(args.model_dir)
# Checkpoint path
ckpt_dir = model_dir.joinpath('checkpoints')
ckpt_path = next(ckpt_dir.glob('*.ckpt'))
model = GoturnTrain.load_from_checkpoint(ckpt_path)
model.eval()
model.freeze()
self._model = model
if dbg:
self._viz = Visualizer()
self._dbg = dbg
def __init__(self,
lamda_shift,
lamda_scale,
min_scale,
max_scale,
dbg=False,
env='sample_generator'):
"""set parameters """
self._lamda_shift = lamda_shift
self._lamda_scale = lamda_scale
self._min_scale = min_scale
self._max_scale = max_scale
self._kSamplesPerImage = 10 # number of synthetic samples per image
self._viz = None
if dbg:
self._env = env
self._viz = Visualizer(env=self._env)
self._dbg = dbg
def __init__(self, hparams, dbg=False):
'''
Pytorch lightning module for training goturn tracker.
@hparams: all the argparse arguments for training
@dbg: boolean for switching on visualizer
'''
logger.info('=' * 15)
logger.info('GOTURN TRACKER')
logger.info('=' * 15)
super(GoturnTrain, self).__init__()
self.__set_seed(hparams.seed)
self.hparams = hparams
logger.info('Setting up the network...')
# network with pretrained model
self._model = GoturnNetwork(self.hparams.pretrained_model)
self._dbg = dbg
if dbg:
self._viz = Visualizer(port=8097)
def __init__(self, imgs_dir, ann_dir, isTrain=True, val_ratio=0.2, dbg=False):
'''
loading images and annotation from imagenet
@imgs_dir: images path
@ann_dir: annotations path
@isTrain: True: Training, False: validation
@val_ratio: validation data ratio
@dbg: For visualization
'''
if not Path(imgs_dir).is_dir():
logger.error('{} is not a valid directory'.format(imgs_dir))
self._imgs_dir = Path(imgs_dir)
self._ann_dir = Path(ann_dir)
self._kMaxRatio = 0.66
self._list_of_annotations = self.__loadImageNetDet(isTrain=isTrain, val_ratio=val_ratio)
self._data_fetched = [] # for debug purposes
assert len(self._list_of_annotations) > 0, 'Number of valid annotations is {}'.format(len(self._list_of_annotations))
self._dbg = dbg
if dbg:
self._env = 'ImageNet'
self._viz = Visualizer(env=self._env)
class GoturnTracker:
"""Docstring for . """
def __init__(self, args, dbg=False):
"""load model """
loader = loadfromfolder(args.input)
self._vid_frames = loader.get_video_frames()
model_dir = Path(args.model_dir)
# Checkpoint path
ckpt_dir = model_dir.joinpath('checkpoints')
ckpt_path = next(ckpt_dir.glob('*.ckpt'))
model = GoturnTrain.load_from_checkpoint(ckpt_path)
model.eval()
model.freeze()
self._model = model
if dbg:
self._viz = Visualizer()
self._dbg = dbg
def vis_images(self, prev, curr, gt_bb, pred_bb, prefix='train'):
def unnormalize(image, mean, std):
image = np.transpose(image, (1, 2, 0)) * std + mean
image = image.astype(np.float32)
return image
for i in range(0, prev.shape[0]):
_mean = np.array([104, 117, 123])
_std = np.ones_like(_mean)
prev_img = prev[i].cpu().detach().numpy()
curr_img = curr[i].cpu().detach().numpy()
prev_img = unnormalize(prev_img, _mean, _std)
curr_img = unnormalize(curr_img, _mean, _std)
gt_bb_i = BoundingBox(*gt_bb[i].cpu().detach().numpy().tolist())
gt_bb_i.unscale(curr_img)
curr_img = draw.bbox(curr_img, gt_bb_i, color=(255, 255, 255))
pred_bb_i = BoundingBox(
*pred_bb[i].cpu().detach().numpy().tolist())
pred_bb_i.unscale(curr_img)
curr_img = draw.bbox(curr_img, pred_bb_i)
out = np.concatenate(
(prev_img[np.newaxis, ...], curr_img[np.newaxis, ...]), axis=0)
out = np.transpose(out, [0, 3, 1, 2])
self._viz.plot_images_np(out,
title='sample_{}'.format(i),
env='goturn_{}'.format(prefix))
def _track(self, curr_frame, prev_frame, rect):
"""track current frame
@curr_frame: current frame
@prev_frame: prev frame
@rect: bounding box of previous frame
"""
prev_bbox = rect
target_pad, _, _, _ = cropPadImage(prev_bbox, prev_frame)
cur_search_region, search_location, edge_spacing_x, edge_spacing_y = cropPadImage(
prev_bbox, curr_frame)
if self._dbg:
self._viz.plot_image_opencv(target_pad, 'target')
self._viz.plot_image_opencv(cur_search_region, 'current')
target_pad_in = self.preprocess(target_pad, mean=None).unsqueeze(0)
cur_search_region_in = self.preprocess(cur_search_region,
mean=None).unsqueeze(0)
pred_bb = self._model.forward(target_pad_in, cur_search_region_in)
if self._dbg:
prev_bbox.scale(prev_frame)
x1, y1, x2, y2 = prev_bbox.x1, prev_bbox.y1, prev_bbox.x2, prev_bbox.y2
prev_bbox = torch.tensor([x1, y1, x2, y2]).unsqueeze(0)
target_dbg = target_pad_in.clone()
cur_search_region_dbg = cur_search_region_in.clone()
self.vis_images(target_dbg, cur_search_region_dbg, prev_bbox,
pred_bb)
pred_bb = BoundingBox(*pred_bb[0].cpu().detach().numpy().tolist())
pred_bb.unscale(cur_search_region)
pred_bb.uncenter(curr_frame, search_location, edge_spacing_x,
edge_spacing_y)
x1, y1, x2, y2 = int(pred_bb.x1), int(pred_bb.y1), int(
pred_bb.x2), int(pred_bb.y2)
pred_bb = BoundingBox(x1, y1, x2, y2)
return pred_bb
def preprocess(self, im, mean=None):
"""preprocess image before forward pass, this is the same
preprocessing used during training, please refer to collate function
in train.py for reference
@image: input image
"""
# preprocessing for all pretrained pytorch models
if mean:
im = resize(im, (227, 227)) - mean
else:
mean = np.array([104, 117, 123])
im = resize(im, (227, 227)) - mean
im = image_io.image_to_tensor(im)
return im
def track(self):
"""Track"""
vid_frames = self._vid_frames[0]
num_frames = len(vid_frames)
f_path = vid_frames[0]
frame_0 = image_io.load(f_path)
prev = np.asarray(frame_0)
global image
image = prev
while True:
# prev_out = cv2.cvtColor(prev, cv2.COLOR_RGB2BGR)
prev_out = np.copy(prev)
cv2.imshow('image', prev_out)
key = cv2.waitKey(1) & 0xFF
if key == ord('s'):
(x1, y1), (x2, y2) = refPt[0], refPt[1]
bbox_0 = BoundingBox(x1, y1, x2, y2)
break
elif key == ord('r'):
(x1, y1), (x2, y2) = refPt[0], refPt[1]
bbox_0 = BoundingBox(x1, y1, x2, y2)
break
for i in range(1, num_frames):
f_path = vid_frames[i]
frame_1 = image_io.load(f_path)
curr = np.asarray(frame_1)
bbox_0 = self._track(curr, prev, bbox_0)
bbox = bbox_0
prev = curr
if cv2.waitKey(1) & 0xFF == ord('p'):
while True:
image = curr
cv2.imshow("image", curr)
key = cv2.waitKey(0) & 0xFF
if key == ord("s"):
(x1, y1), (x2, y2) = refPt[0], refPt[1]
bbox_0 = BoundingBox(x1, y1, x2, y2)
break
curr_dbg = np.copy(curr)
curr_dbg = cv2.rectangle(curr_dbg, (int(bbox.x1), int(bbox.y1)),
(int(bbox.x2), int(bbox.y2)),
(255, 255, 0), 2)
# curr_dbg = cv2.cvtColor(curr_dbg, cv2.COLOR_RGB2BGR)
cv2.imshow('image', curr_dbg)
# cv2.imwrite('./output/{:04d}.png'.format(i), curr_dbg)
cv2.waitKey(20)
class GoturnTrain(LightningModule):
"""Docstring for GoturnTrain. """
def __init__(self, hparams, dbg=False):
'''
Pytorch lightning module for training goturn tracker.
@hparams: all the argparse arguments for training
@dbg: boolean for switching on visualizer
'''
logger.info('=' * 15)
logger.info('GOTURN TRACKER')
logger.info('=' * 15)
super(GoturnTrain, self).__init__()
self.__set_seed(hparams.seed)
self.hparams = hparams
logger.info('Setting up the network...')
# network with pretrained model
self._model = GoturnNetwork(self.hparams.pretrained_model)
self._dbg = dbg
if dbg:
self._viz = Visualizer(port=8097)
def __freeze(self):
"""Freeze the model features layer
"""
features_layer = self._model._net
for param in features_layer.parameters():
param.requires_grad = False
def _set_conv_layer(self, conv_layers, param_dict):
for layer in conv_layers.modules():
if type(layer) == torch.nn.modules.conv.Conv2d:
param_dict.append({
'params': layer.weight,
'lr': 0,
'weight_decay': self.hparams.wd
})
param_dict.append({
'params': layer.bias,
'lr': 0,
'weight_decay': 0
})
return param_dict
def __set_lr(self):
'''set learning rate for classifier layer'''
param_dict = []
if 1:
conv_layers = self._model._net_1
param_dict = self._set_conv_layer(conv_layers, param_dict)
conv_layers = self._model._net_2
param_dict = self._set_conv_layer(conv_layers, param_dict)
regression_layer = self._model._classifier
for layer in regression_layer.modules():
if type(layer) == torch.nn.modules.linear.Linear:
param_dict.append({
'params': layer.weight,
'lr': 10 * self.hparams.lr,
'weight_decay': self.hparams.wd
})
param_dict.append({
'params': layer.bias,
'lr': 20 * self.hparams.lr,
'weight_decay': 0
})
return param_dict
def find_lr(self):
"""finding suitable learning rate """
model = self._model
params = self.__set_lr()
criterion = torch.nn.L1Loss(size_average=False)
optimizer = CaffeSGD(params,
lr=1e-8,
momentum=self.hparams.momentum,
weight_decay=self.hparams.wd)
lr_finder = LRFinder(model, optimizer, criterion, device="cuda")
trainloader = self.train_dataloader()
lr_finder.range_test(trainloader,
start_lr=1e-7,
end_lr=1,
num_iter=500)
lr_finder.plot()
def __set_seed(self, SEED):
''' set all the seeds for reproducibility '''
logger.info('Settings seed = {}'.format(SEED))
torch.manual_seed(SEED)
np.random.seed(SEED)
random.seed(SEED)
cudnn.deterministic = True
@staticmethod
def add_model_specific_args(parent_parser):
''' These are specific parameters for the sample generator '''
ap = argparse.ArgumentParser(parents=[parent_parser])
ap.add_argument('--min_scale',
type=float,
default=-0.4,
help='min scale')
ap.add_argument('--max_scale',
type=float,
default=0.4,
help='max scale')
ap.add_argument('--lamda_shift', type=float, default=5)
ap.add_argument('--lamda_scale', type=int, default=15)
return ap
def configure_optimizers(self):
"""Configure optimizers"""
logger.info(
'Configuring optimizer: SGD with lr = {}, momentum = {}'.format(
self.hparams.lr, self.hparams.momentum))
params = self.__set_lr()
optimizer = CaffeSGD(params,
lr=self.hparams.lr,
momentum=self.hparams.momentum,
weight_decay=self.hparams.wd)
scheduler = torch.optim.lr_scheduler.StepLR(
optimizer,
step_size=self.hparams.lr_step,
gamma=self.hparams.gamma)
return [optimizer], [scheduler]
@pl.data_loader
def train_dataloader(self):
"""train dataloader"""
logger.info('===' * 20)
logger.info('Loading dataset for training, please wait...')
logger.info('===' * 20)
imagenet_path = self.hparams.imagenet_path
alov_path = self.hparams.alov_path
mean_file = None
manager = Manager()
objGoturn = GoturnDataloader(imagenet_path,
alov_path,
mean_file=mean_file,
images_p=manager.list(),
targets_p=manager.list(),
bboxes_p=manager.list(),
val_ratio=0.005,
isTrain=True,
dbg=False)
train_loader = DataLoader(objGoturn,
batch_size=self.hparams.batch_size,
shuffle=True,
num_workers=6,
collate_fn=objGoturn.collate)
return train_loader
@pl.data_loader
def val_dataloader(self):
"""validation dataloader"""
logger.info('===' * 20)
logger.info('Loading dataset for Validation, please wait...')
logger.info('===' * 20)
imagenet_path = self.hparams.imagenet_path
alov_path = self.hparams.alov_path
mean_file = None
manager = Manager()
objGoturn = GoturnDataloader(imagenet_path,
alov_path,
mean_file=mean_file,
images_p=manager.list(),
targets_p=manager.list(),
bboxes_p=manager.list(),
val_ratio=0.005,
isTrain=False,
dbg=False)
val_loader = DataLoader(objGoturn,
batch_size=self.hparams.batch_size,
shuffle=True,
num_workers=6,
collate_fn=objGoturn.collate)
return val_loader
def forward(self, prev, curr):
"""forward function
"""
pred_bb = self._model(prev.float(), curr.float())
return pred_bb
def vis_images(self, prev, curr, gt_bb, pred_bb, prefix='train'):
def unnormalize(image, mean):
image = np.transpose(image, (1, 2, 0)) + mean
image = image.astype(np.float32)
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
return image
for i in range(0, prev.shape[0]):
# _mean = np.load(self.hparams.mean_file)
_mean = np.array([104, 117, 123])
prev_img = prev[i].cpu().detach().numpy()
curr_img = curr[i].cpu().detach().numpy()
prev_img = unnormalize(prev_img, _mean)
curr_img = unnormalize(curr_img, _mean)
gt_bb_i = BoundingBox(*gt_bb[i].cpu().detach().numpy().tolist())
gt_bb_i.unscale(curr_img)
curr_img = draw.bbox(curr_img, gt_bb_i, color=(255, 0, 255))
pred_bb_i = BoundingBox(
*pred_bb[i].cpu().detach().numpy().tolist())
pred_bb_i.unscale(curr_img)
curr_img = draw.bbox(curr_img, pred_bb_i)
out = np.concatenate(
(prev_img[np.newaxis, ...], curr_img[np.newaxis, ...]), axis=0)
out = np.transpose(out, [0, 3, 1, 2])
self._viz.plot_images_np(out,
title='sample_{}'.format(i),
env='goturn_{}'.format(prefix))
def training_step(self, batch, batch_idx):
"""Training step
@batch: current batch data
@batch_idx: current batch index
"""
curr, prev, gt_bb = batch
pred_bb = self.forward(prev, curr)
loss = torch.nn.L1Loss(size_average=False)(pred_bb.float(),
gt_bb.float())
if self.trainer.use_dp:
loss = loss.unsqueeze(0)
if self._dbg:
if batch_idx % 1000 == 0:
d = {'loss': loss.item()}
iters = (self.trainer.num_training_batches -
1) * self.current_epoch + batch_idx
self._viz.plot_curves(d,
iters,
title='Train',
ylabel='train_loss')
if batch_idx % 1000 == 0:
self.vis_images(prev, curr, gt_bb, pred_bb)
tqdm_dict = {'batch_loss': loss}
output = OrderedDict({
'loss': loss,
'progress_bar': tqdm_dict,
'log': tqdm_dict
})
return output
def validation_step(self, batch, batch_idx):
"""validation step
@batch: current batch data
@batch_idx: current batch index
"""
curr, prev, gt_bb = batch
pred_bb = self.forward(prev, curr)
loss = torch.nn.L1Loss(size_average=False)(pred_bb, gt_bb.float())
if self.trainer.use_dp:
loss = loss.unsqueeze(0)
if self._dbg:
if batch_idx % 100 == 0:
d = {'loss': loss.item()}
iters = (self.trainer.num_val_batches -
1) * self.current_epoch + batch_idx
self._viz.plot_curves(d,
iters,
title='Validation',
ylabel='val_loss')
if batch_idx % 1000 == 0:
self.vis_images(prev, curr, gt_bb, pred_bb, prefix='val')
tqdm_dict = {'val_loss': loss}
output = OrderedDict({
'val_loss': loss,
'progress_bar': tqdm_dict,
'log': tqdm_dict
})
return output
def validation_end(self, outputs):
avg_loss = torch.stack([x['val_loss'] for x in outputs]).mean()
return {'val_loss': avg_loss}
class sample_generator:
"""Generate samples from single frame"""
def __init__(self,
lamda_shift,
lamda_scale,
min_scale,
max_scale,
dbg=False,
env='sample_generator'):
"""set parameters """
self._lamda_shift = lamda_shift
self._lamda_scale = lamda_scale
self._min_scale = min_scale
self._max_scale = max_scale
self._kSamplesPerImage = 10 # number of synthetic samples per image
self._viz = None
if dbg:
self._env = env
self._viz = Visualizer(env=self._env)
self._dbg = dbg
def make_true_sample(self):
"""Generate true target:search_region pair"""
curr_prior_tight = self.bbox_prev_gt_
target_pad = self.target_pad_
# To find out the region in which we need to search in the
# current frame, we use the previous frame bbox to get the
# region in which we can make the search
output = cropPadImage(curr_prior_tight, self.img_curr_, self._dbg,
self._viz)
curr_search_region, curr_search_location, edge_spacing_x, edge_spacing_y = output
bbox_curr_gt = self.bbox_curr_gt_
bbox_curr_gt_recentered = BoundingBox(0, 0, 0, 0)
bbox_curr_gt_recentered = bbox_curr_gt.recenter(
curr_search_location, edge_spacing_x, edge_spacing_y,
bbox_curr_gt_recentered)
if self._dbg:
env = self._env + '_make_true_sample'
search_dbg = draw.bbox(self.img_curr_, curr_search_location)
search_dbg = draw.bbox(search_dbg,
bbox_curr_gt,
color=(255, 255, 0))
self._viz.plot_image_opencv(search_dbg, 'search_region', env=env)
recentered_img = draw.bbox(curr_search_region,
bbox_curr_gt_recentered,
color=(255, 255, 0))
self._viz.plot_image_opencv(recentered_img,
'cropped_search_region',
env=env)
del recentered_img
del search_dbg
bbox_curr_gt_recentered.scale(curr_search_region)
return curr_search_region, target_pad, bbox_curr_gt_recentered
def make_training_samples(self, num_samples, images, targets,
bbox_gt_scales):
"""
@num_samples: number of samples
@images: set of num_samples appended to images list
@target: set of num_samples targets appended to targets list
@bbox_gt_scales: bounding box to be regressed (scaled version)
"""
for i in range(num_samples):
image_rand_focus, target_pad, bbox_gt_scaled = self.make_training_sample_BBShift(
)
images.append(image_rand_focus)
targets.append(target_pad)
bbox_gt_scales.append(bbox_gt_scaled)
if self._dbg:
self.visualize(image_rand_focus, target_pad, bbox_gt_scaled, i)
return images, targets, bbox_gt_scales
def visualize(self, image, target, bbox, idx):
"""
sample generator prepares image and the respective targets (with
bounding box). This function helps you to visualize it.
The visualization is based on the Visdom server, please
initialize the visdom server by running the command
$ python -m visdom.server
open http://localhost:8097 in your browser to visualize the
images
"""
if image_io._is_pil_image(image):
image = np.asarray(image)
if image_io._is_pil_image(target):
target = np.asarray(target)
target = cv2.resize(target, (227, 227))
target = cv2.cvtColor(target, cv2.COLOR_BGR2RGB)
image = cv2.resize(image, (227, 227))
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
bbox.unscale(image)
bbox.x1, bbox.x2, bbox.y1, bbox.y2 = int(bbox.x1), int(bbox.x2), int(
bbox.y1), int(bbox.y2)
image_bb = draw.bbox(image, bbox)
out = np.concatenate(
(target[np.newaxis, ...], image_bb[np.newaxis, ...]), axis=0)
out = np.transpose(out, [0, 3, 1, 2])
self._viz.plot_images_np(out,
title='sample_{}'.format(idx),
env=self._env + '_train')
def get_default_bb_params(self):
"""default bb parameters"""
default_params = bbParams(self._lamda_shift, self._lamda_scale,
self._min_scale, self._max_scale)
return default_params
def make_training_sample_BBShift_(self, bbParams, dbg=False):
"""generate training samples based on bbparams"""
bbox_curr_gt = self.bbox_curr_gt_
bbox_curr_shift = BoundingBox(0, 0, 0, 0)
bbox_curr_shift = bbox_curr_gt.shift(
self.img_curr_, bbParams.lamda_scale, bbParams.lamda_shift,
bbParams.min_scale, bbParams.max_scale, True, bbox_curr_shift)
rand_search_region, rand_search_location, edge_spacing_x, edge_spacing_y = cropPadImage(
bbox_curr_shift, self.img_curr_, dbg=self._dbg, viz=self._viz)
bbox_curr_gt = self.bbox_curr_gt_
bbox_gt_recentered = BoundingBox(0, 0, 0, 0)
bbox_gt_recentered = bbox_curr_gt.recenter(rand_search_location,
edge_spacing_x,
edge_spacing_y,
bbox_gt_recentered)
if dbg:
env = self._env + '_make_training_sample_bbshift'
viz = self._viz
curr_img_bbox = draw.bbox(self.img_curr_, bbox_curr_gt)
recentered_img = draw.bbox(rand_search_region, bbox_gt_recentered)
viz.plot_image_opencv(curr_img_bbox, 'curr shifted bbox', env=env)
viz.plot_image_opencv(recentered_img,
'recentered shifted bbox',
env=env)
bbox_gt_recentered.scale(rand_search_region)
bbox_gt_scaled = bbox_gt_recentered
return rand_search_region, self.target_pad_, bbox_gt_scaled
def make_training_sample_BBShift(self):
"""
bb_params consists of shift, scale, min-max scale for shifting
the current bounding box
"""
default_bb_params = self.get_default_bb_params()
image_rand_focus, target_pad, bbox_gt_scaled = self.make_training_sample_BBShift_(
default_bb_params, self._dbg)
return image_rand_focus, target_pad, bbox_gt_scaled
def reset(self, bbox_curr, bbox_prev, img_curr, img_prev):
"""This prepares the target image with enough context (search
region)
@bbox_curr: current frame bounding box
@bbox_prev: previous frame bounding box
@img_curr: current frame
@img_prev: previous frame
"""
target_pad, pad_image_location, _, _ = cropPadImage(bbox_prev,
img_prev,
dbg=self._dbg,
viz=self._viz)
self.img_curr_ = img_curr
self.bbox_curr_gt_ = bbox_curr
self.bbox_prev_gt_ = bbox_prev
self.target_pad_ = target_pad # crop kContextFactor * bbox_curr copied
if self._dbg:
env = self._env + '_targetpad'
search_dbg = draw.bbox(img_prev, bbox_prev, color=(0, 0, 255))
search_dbg = draw.bbox(search_dbg, pad_image_location)
self._viz.plot_image_opencv(search_dbg, 'target_region', env=env)
self._viz.plot_image_opencv(target_pad,
'cropped_target_region',
env=env)
del search_dbg