def _with_predictions(self):
self._logger.debug('__init__')
for video_idx, video in enumerate(self._videos):
filename = re.match(r'[\.\/\w]*\/(\w+).\w+', video.path)
if filename is None:
logging.ERROR(
'Check paths videos, template to extract video name'
' does not match')
filename = filename.group(1)
self._videoname2idx[filename] = video_idx
self._idx2videoname[video_idx] = filename
names = np.asarray([video_idx] * video.n_frames).reshape((-1, 1))
idxs = np.asarray(list(range(0, video.n_frames))).reshape((-1, 1))
if opt.gt_training:
gt_file = np.asarray(video._gt).reshape((-1, 1))
else:
gt_file = np.asarray(video._z).reshape((-1, 1))
if self._features is None:
features = video.features()
else:
features = self._features[video.global_range]
temp_feature_list = join_data(None,
(names, idxs, gt_file, features),
np.hstack)
self._feature_list = join_data(self._feature_list,
temp_feature_list, np.vstack)
self._features = None
def __init__(self, videos, features):
logger.debug('Relative time labels')
super().__init__(videos, features)
temp_features = None # used only if opt.concat > 1
for video in self._videos:
time_label = np.asarray(video.temp).reshape((-1, 1))
video_features = self._features[video.global_range]
temp_features = join_data(temp_features, video_features, np.vstack)
self._gt = join_data(self._gt, time_label, np.vstack)
def _init_videos(self):
logger.debug('.')
gt_stat = Counter()
for root, dirs, files in os.walk(opt.data):
if not files:
continue
for filename in files:
# pick only videos with certain complex action
# (ex: just concerning coffee)
if self._subaction in filename:
if opt.test_set:
if opt.reduced:
opt.reduced = opt.reduced - 1
continue
# if opt.dataset == 'fs':
# gt_name = filename[:-(len(opt.ext) + 1)] + '.txt'
# else:
match = re.match(r'(.*)\..*', filename)
gt_name = match.group(1)
# use extracted features from pretrained on gt embedding
if opt.load_embed_feat:
path = os.path.join(
opt.data, 'embed', opt.subaction,
opt.resume_str % opt.subaction) + '_%s' % gt_name
else:
path = os.path.join(root, filename)
start = 0 if self._features is None else self._features.shape[
0]
try:
video = Video(path,
K=self._K,
gt=self.gt_map.gt[gt_name],
name=gt_name,
start=start,
with_bg=self._with_bg)
except AssertionError:
logger.debug('Assertion Error: %s' % gt_name)
continue
self._features = join_data(self._features,
video.features(), np.vstack)
video.reset() # to not store second time loaded features
self._videos.append(video)
# accumulate statistic for inverse counts vector for each video
gt_stat.update(self.gt_map.gt[gt_name])
if opt.reduced:
if len(self._videos) > opt.reduced:
break
if opt.feature_dim > 100:
if len(self._videos) % 20 == 0:
logger.debug('loaded %d videos' %
len(self._videos))
# update global range within the current collection for each video
for video in self._videos:
video.update_indexes(len(self._features))
logger.debug('gt statistic: %d videos ' % len(self._videos) +
str(gt_stat))
self._update_fg_mask()
def gaussian_model(self):
logger.debug('Fit Gaussian Mixture Model to the whole dataset at once')
self._gaussians_fit()
for video_idx in range(len(self._videos)):
self._video_likelihood_grid(video_idx)
if opt.bg:
scores = None
for video in self._videos:
scores = join_data(scores, video.get_likelihood(), np.vstack)
bg_trh_score = np.sort(scores, axis=0)[int(
(opt.bg_trh / 100) * scores.shape[0])]
bg_trh_set = []
for action_idx in range(self._K):
new_bg_trh = self._gaussians[
action_idx].mean_score - bg_trh_score[action_idx]
self._gaussians[action_idx].update_trh(new_bg_trh=new_bg_trh)
bg_trh_set.append(new_bg_trh)
logger.debug('new bg_trh: %s' % str(bg_trh_set))
trh_set = []
for action_idx in range(self._K):
trh_set.append(self._gaussians[action_idx].trh)
for video in self._videos:
video.valid_likelihood_update(trh_set)
def regression_training(self):
if opt.load_embed_feat:
logger.debug('load precomputed features')
self._embedded_feat = self._features
return
logger.debug('.')
dataloader = load_reltime(videos=self._videos, features=self._features)
model, loss, optimizer = mlp.create_model()
if opt.load_model:
model.load_state_dict(load_model())
self._embedding = model
else:
self._embedding = training(dataloader,
opt.epochs,
save=opt.save_model,
model=model,
loss=loss,
optimizer=optimizer,
name=opt.model_name)
self._embedding = self._embedding.cpu()
unshuffled_dataloader = load_reltime(videos=self._videos,
features=self._features,
shuffle=False)
gt_relative_time = None
relative_time = None
if opt.model_name == 'mlp':
for batch_features, batch_gtreltime in unshuffled_dataloader:
if self._embedded_feat is None:
self._embedded_feat = batch_features
else:
self._embedded_feat = torch.cat(
(self._embedded_feat, batch_features), 0)
batch_gtreltime = batch_gtreltime.numpy().reshape((-1, 1))
gt_relative_time = join_data(gt_relative_time, batch_gtreltime,
np.vstack)
relative_time = self._embedding(
self._embedded_feat.float()).detach().numpy().reshape((-1, 1))
self._embedded_feat = self._embedding.embedded(
self._embedded_feat.float()).detach().numpy()
self._embedded_feat = np.squeeze(self._embedded_feat)
if opt.save_embed_feat:
self.save_embed_feat()
mse = np.sum((gt_relative_time - relative_time)**2)
mse = mse / len(relative_time)
logger.debug('MLP training: MSE: %f' % mse)
def __init__(self, videos, features):
logger.debug('Ground Truth labels')
super().__init__(videos, features)
for video in self._videos:
gt_item = np.asarray(video.gt).reshape((-1, 1))
# video_features = self._videos_features[video.global_range]
# video_features = join_data(None, (gt_item, video_features),
# np.hstack)
self._gt = join_data(self._gt, gt_item, np.vstack)
def labels(self, new_labels):
self._labels = join_data(self._labels, new_labels, np.hstack)
self._sizes += [self.size] * len(new_labels)
def data(self, new_data):
self._data = join_data(self._data, new_data, np.vstack)
