def estimate_saliency():
"""The main function for executing network testing. It loads the specified
dataset iterator and optimized saliency model. By default, when no model
checkpoint is found locally, the pretrained weights will be downloaded.
Testing only works for models trained on the same device as specified in
the config file.
Args:
dataset (str): Denotes the dataset that was used during training.
paths (dict, str): A dictionary with all path elements.
device (str): Represents either "cpu" or "gpu".
"""
iterator = data.get_dataset_iterator("results/hpe/")
next_element, init_op = iterator
input_images, original_shape, file_path = next_element
graph_def = tf.compat.v1.GraphDef()
with tf.compat.v1.gfile.Open(SALIENCY_MODEL_PATH, "rb") as file:
graph_def.ParseFromString(file.read())
[predicted_maps
] = tf.compat.v1.import_graph_def(graph_def,
input_map={"input": input_images},
return_elements=["output:0"])
jpeg = data.postprocess_saliency_map(predicted_maps[0], original_shape[0])
print(">> Estimating Saliency...")
with tf.compat.v1.Session() as sess:
sess.run(init_op)
while True:
try:
output_file, path = sess.run([jpeg, file_path])
except tf.compat.v1.errors.OutOfRangeError:
break
path = path[0][0].decode("utf-8")
filename = os.path.basename(path)
filename = os.path.splitext(filename)[0]
filename += ".jpg"
try:
with open("results/saliency/" + filename, "wb") as file:
file.write(output_file)
print("Done!")
except:
print("Failed to write file.")
def train_model(dataset, paths, device):
"""The main function for executing network training. It loads the specified
dataset iterator, saliency model, and helper classes. Training is then
performed in a new session by iterating over all batches for a number of
epochs. After validation on an independent set, the model is saved and
the training history is updated.
Args:
dataset (str): Denotes the dataset to be used during training.
paths (dict, str): A dictionary with all path elements.
device (str): Represents either "cpu" or "gpu".
"""
iterator = data.get_dataset_iterator("train", dataset, paths["data"])
next_element, train_init_op, valid_init_op = iterator
input_images, ground_truths = next_element[:2]
input_plhd = tf.placeholder_with_default(input_images,
(None, None, None, 3),
name="input")
#training = tf.placeholder(tf.bool, name="training") ## For BN
msi_net = model_bn.MSINET(is_train=True)
predicted_maps = msi_net.forward(input_plhd)
optimizer, loss = msi_net.train(ground_truths, predicted_maps,
config.PARAMS["learning_rate"])
n_train_data = getattr(data, dataset.upper()).n_train
n_valid_data = getattr(data, dataset.upper()).n_valid
n_train_batches = int(np.ceil(n_train_data / config.PARAMS["batch_size"]))
n_valid_batches = int(np.ceil(n_valid_data / config.PARAMS["batch_size"]))
history = utils.History(n_train_batches,
n_valid_batches,
dataset,
paths["history"],
device)
progbar = utils.Progbar(n_train_data,
n_train_batches,
config.PARAMS["batch_size"],
config.PARAMS["n_epochs"],
history.prior_epochs)
#training = tf.placeholder(tf.bool, name="training") ## For BN
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
saver = msi_net.restore(sess, dataset, paths, device)
print(">> Start training on %s..." % dataset.upper())
for epoch in range(config.PARAMS["n_epochs"]):
sess.run(train_init_op)
for batch in range(n_train_batches):
#_, error = sess.run([optimizer, loss], feed_dict={training: True})
_, error = sess.run([optimizer, loss])
history.update_train_step(error)
progbar.update_train_step(batch)
sess.run(valid_init_op)
for batch in range(n_valid_batches):
#error = sess.run(loss, feed_dict={training: False})
error = sess.run(loss)
history.update_valid_step(error)
progbar.update_valid_step()
msi_net.save(saver, sess, dataset, paths["latest"], device)
history.save_history()
progbar.write_summary(history.get_mean_train_error(),
history.get_mean_valid_error())
if history.valid_history[-1] == min(history.valid_history):
msi_net.save(saver, sess, dataset, paths["best"], device)
msi_net.optimize(sess, dataset, paths["best"], device)
print("\tBest model!", flush=True)
def test_model(dataset, paths, device):
"""The main function for executing network testing. It loads the specified
dataset iterator and optimized saliency model. By default, when no model
checkpoint is found locally, the pretrained weights will be downloaded.
Testing only works for models trained on the same device as specified in
the config file.
Args:
dataset (str): Denotes the dataset that was used during training.
paths (dict, str): A dictionary with all path elements.
device (str): Represents either "cpu" or "gpu".
"""
iterator = data.get_dataset_iterator("test", dataset, paths["data"])
next_element, init_op = iterator
input_images, original_shape, file_path = next_element
#training = tf.placeholder(tf.bool, name="training") ## For BN
graph_def = tf.GraphDef()
model_name = "model_%s_%s.pb" % (dataset, device)
if os.path.isfile(paths["best"] + model_name):
with tf.gfile.Open(paths["best"] + model_name, "rb") as file:
graph_def.ParseFromString(file.read())
else:
if not os.path.isfile(paths["weights"] + model_name):
download.download_pretrained_weights(paths["weights"],
model_name[:-3])
with tf.gfile.Open(paths["weights"] + model_name, "rb") as file:
graph_def.ParseFromString(file.read())
[predicted_maps] = tf.import_graph_def(graph_def,
input_map={"input": input_images},
return_elements=["output:0"])
jpeg = data.postprocess_saliency_map(predicted_maps[0],
original_shape[0])
print(">> Start testing with %s %s model..." % (dataset.upper(), device))
with tf.Session() as sess:
sess.run(init_op)
while True:
try:
#output_file, path = sess.run([jpeg, file_path], feed_dict={training: False})
output_file, path = sess.run([jpeg, file_path])
except tf.errors.OutOfRangeError:
break
path = path[0][0].decode("utf-8")
filename = os.path.basename(path)
filename = os.path.splitext(filename)[0]
filename += ".jpeg"
os.makedirs(paths["images"], exist_ok=True)
with open(paths["images"] + filename, "wb") as file:
file.write(output_file)
def test_model(dataset, paths, device):
"""The main function for executing network testing. It loads the specified
dataset iterator and optimized saliency model. By default, when no model
checkpoint is found locally, the pretrained weights will be downloaded.
Testing only works for models trained on the same device as specified in
the config file.
Args:
dataset (str): Denotes the dataset that was used during training.
paths (dict, str): A dictionary with all path elements.
device (str): Represents either "cpu" or "gpu".
"""
video_file = tf.placeholder(tf.string, shape=())
iterator = data.get_dataset_iterator("test", dataset, paths["data"],
video_file)
next_element, init_op = iterator
input_images, original_shape, file_path = next_element
graph_def = tf.GraphDef()
model_name = "model_%s_%s.pb" % (dataset, device)
if os.path.isfile(paths["best"] + model_name):
with tf.gfile.Open(paths["best"] + model_name, "rb") as file:
graph_def.ParseFromString(file.read())
else:
if not os.path.isfile(paths["weights"] + model_name):
download.download_pretrained_weights(paths["weights"],
model_name[:-3])
with tf.gfile.Open(paths["weights"] + model_name, "rb") as file:
graph_def.ParseFromString(file.read())
[predicted_maps] = tf.import_graph_def(graph_def,
input_map={"input": input_images},
return_elements=["output:0"])
print(">> Start testing with %s %s model..." % (dataset.upper(), device))
with tf.Session() as sess:
video_files = data._get_file_list(paths["data"])
for vf in video_files:
print(vf)
saliency_images_list = []
sess.run(init_op, feed_dict={video_file: vf})
while True:
try:
saliency_images, target_shape, np_file_path = \
sess.run([predicted_maps, original_shape, file_path],
feed_dict={video_file:vf})
saliency_images_list.append(saliency_images)
except tf.errors.OutOfRangeError:
break
saliency_video = np.concatenate(saliency_images_list)
target_shape = target_shape[0]
np_file_path = np_file_path[0][0]
commonpath = os.path.commonpath([paths["data"], paths["images"]])
file_path_str = np_file_path.decode("utf8")
relative_file_path = os.path.relpath(file_path_str,
start=commonpath)
output_file_path = os.path.join(paths["images"],
relative_file_path)
os.makedirs(os.path.dirname(output_file_path), exist_ok=True)
fourcc = cv2.VideoWriter_fourcc(*'XVID')
frame_size = (target_shape[1], target_shape[0])
frame_size = (saliency_video.shape[2], saliency_video.shape[1])
out = cv2.VideoWriter(output_file_path, fourcc, 25, frame_size,
False)
saliency_video = np.squeeze(saliency_video)
saliency_video *= 255
for frame in saliency_video:
saliency_map = data._resize_image(frame,
target_shape,
True,
is_numpy=True)
saliency_map = data._crop_image(saliency_map,
target_shape,
is_numpy=True)
saliency_map = np.round(frame)
saliency_map = saliency_map.astype(np.uint8)
out.write(saliency_map)
out.release()