def test(model_path=None,
video_data_path_test=video_data_path_val,
n_test_samples=n_val_samples):
# test_data = val_data # to evaluate on testing data or validation data
wordtoix = np.load(wordtoix_file).tolist()
ixtoword = pd.Series(np.load(ixtoword_file).tolist())
with tf.device("/gpu:0"):
model = Video_Caption_Generator(dim_image=dim_image,
n_words=len(wordtoix),
dim_hidden=dim_hidden,
batch_size=batch_size,
n_caption_steps=n_caption_steps,
n_video_steps=n_video_steps,
drop_out_rate=0.5,
bias_init_vector=None)
# preprocess on the CPU
with tf.device('/cpu:0'):
train_data, train_encode_data, _, _, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, \
_, _, _, _, train_frame_data = read_and_decode_with_frame(video_data_path_train)
val_data, val_encode_data, val_fname, val_title, val_video_label, val_caption_label, val_caption_id, val_caption_id_1, \
_, _, _, _, val_frame_data = read_and_decode_with_frame(video_data_path_test)
train_data, train_encode_data, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, train_frame_data = \
tf.train.shuffle_batch([train_data, train_encode_data, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, train_frame_data],
batch_size=batch_size, num_threads=num_threads, capacity=prefetch, min_after_dequeue=min_queue_examples)
val_data, val_video_label, val_fname, val_caption_label, val_caption_id_1, val_frame_data = \
tf.train.batch([val_data, val_video_label, val_fname, val_caption_label, val_caption_id_1, val_frame_data],
batch_size=batch_size, num_threads=1, capacity=2* batch_size)
# graph on the GPU
with tf.device("/gpu:0"):
tf_loss, tf_loss_cap, tf_loss_lat, tf_loss_vid, tf_z, tf_v_h, tf_s_h, tf_drop_type \
= model.build_model(train_data, train_frame_data, train_video_label, train_caption_id, train_caption_id_1, train_caption_label)
val_v2s_tf, v2s_lstm3_vars_tf = model.build_v2s_generator(val_data)
val_s2s_tf, s2s_lstm2_vars_tf, s2s_lstm3_vars_tf = model.build_s2s_generator(
val_caption_id_1)
val_s2v_tf, s2v_lstm2_vars_tf, s2v_lstm4_vars_tf = model.build_s2v_generator(
val_caption_id_1, val_frame_data)
val_v2v_tf, v2v_lstm4_vars_tf = model.build_v2v_generator(
val_data, val_frame_data)
sess = tf.InteractiveSession(config=tf.ConfigProto(
allow_soft_placement=True))
with tf.device(cpu_device):
saver = tf.train.Saver()
saver.restore(sess, model_path)
print 'load parameters from:', model_path
# print 'halve the dropout weights..'
# for ind, row in enumerate(v2s_lstm3_vars_tf):
# if ind % 4 == 0:
# assign_op = row.assign(tf.multiply(row,1-0.5))
# sess.run(assign_op)
# for ind, row in enumerate(s2s_lstm2_vars_tf):
# if ind % 4 == 0:
# assign_op = row.assign(tf.multiply(row,1-0.5))
# sess.run(assign_op)
# for ind, row in enumerate(s2v_lstm4_vars_tf):
# if ind % 4 == 0:
# assign_op = row.assign(tf.multiply(row,1-0.5))
# sess.run(assign_op)
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
######### test sentence generation ##########
print 'testing...'
n_test_steps = int(n_test_samples / batch_size)
print 'n_test_steps:', n_test_steps
tstart = time.time()
### TODO: sometimes COCO test show exceptions in the beginning of training ####
if test_v2s:
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
flist] = testing_all(sess, 1, ixtoword, val_v2s_tf, val_fname)
for i, key in enumerate(pred_dict.keys()):
print 'video:', flist[i]
for ele in gt_dict[key]:
print "GT: " + ele['caption']
print "PD: " + pred_dict[key][0]['caption']
print '-------'
print '############## video to sentence result #################'
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
_] = testing_all(sess, n_test_steps, ixtoword, val_v2s_tf, val_fname)
scorer = COCOScorer()
total_score_1 = scorer.score(gt_dict, pred_dict, id_list)
print '############## video to sentence result #################'
if test_s2s:
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
flist] = testing_all(sess, 1, ixtoword, val_s2s_tf, val_fname)
for i, key in enumerate(pred_dict.keys()):
print 'video:', flist[i]
for ele in gt_dict[key]:
print "GT: " + ele['caption']
print "PD: " + pred_dict[key][0]['caption']
print '-------'
print '############## sentence to sentence result #################'
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
_] = testing_all(sess, n_test_steps, ixtoword, val_s2s_tf, val_fname)
scorer = COCOScorer()
total_score_2 = scorer.score(gt_dict, pred_dict, id_list)
print '############## sentence to sentence result #################'
######### test video generation #############
if test_v2v:
mse_v2v = test_all_videos(sess, n_test_steps, val_frame_data,
val_v2v_tf, val_video_label,
pixel_scale_factor)
print 'video2video mse:', mse_v2v
if test_s2v:
mse_s2v = test_all_videos(sess, n_test_steps, val_frame_data,
val_s2v_tf, val_video_label,
pixel_scale_factor)
print 'caption2video mse:', mse_s2v
if save_demo_sent_v2s:
get_demo_sentence(sess,
n_test_steps,
ixtoword,
val_v2s_tf,
val_fname,
result_file=home_folder + 'demo_v2s.txt')
if save_demo_sent_s2s:
get_demo_sentence(sess,
n_test_steps,
ixtoword,
val_s2s_tf,
val_fname,
result_file=home_folder + 'demo_s2s.txt')
if save_demo_video_v2v:
get_demo_video(sess, n_test_steps, val_frame_data, val_v2v_tf,
val_video_label, val_fname, home_folder + 'demo_v2v/',
pixel_scale_factor)
if save_demo_video_s2v:
get_demo_video(sess, n_test_steps, val_frame_data, val_s2v_tf,
val_video_label, val_fname, home_folder + 'demo_s2v/',
pixel_scale_factor)
sys.stdout.flush()
coord.request_stop()
coord.join(threads)
tstop = time.time()
print "Total Time Cost:", round(tstop - tstart, 2), "s"
sess.close()
def train():
assert os.path.isfile(video_data_path_train)
assert os.path.isfile(video_data_path_val)
assert os.path.isdir(model_path)
assert os.path.isfile(wordtoix_file)
assert os.path.isfile(ixtoword_file)
assert drop_strategy in ['block_video', 'block_sent', 'random', 'keep']
wordtoix = np.load(wordtoix_file).tolist()
ixtoword = pd.Series(np.load(ixtoword_file).tolist())
print 'build model and session...'
# shared parameters on the GPU
with tf.device("/gpu:0"):
model = Video_Caption_Generator(dim_image=dim_image,
n_words=len(wordtoix),
dim_hidden=dim_hidden,
batch_size=batch_size,
n_caption_steps=n_caption_steps,
n_video_steps=n_video_steps,
drop_out_rate=0.5,
bias_init_vector=None)
tStart_total = time.time()
n_epoch_steps = int(n_train_samples / batch_size)
n_steps = n_epochs * n_epoch_steps
# preprocess on the CPU
with tf.device('/cpu:0'):
train_data, train_encode_data, _, _, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, \
_, _, _, _, train_frame_data = read_and_decode_with_frame(video_data_path_train)
val_data, val_encode_data, val_fname, val_title, val_video_label, val_caption_label, val_caption_id, val_caption_id_1, \
_, _, _, _, val_frame_data = read_and_decode_with_frame(video_data_path_val)
# random batches
train_data, train_encode_data, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, train_frame_data = \
tf.train.shuffle_batch([train_data, train_encode_data, train_video_label, train_caption_label, train_caption_id, train_caption_id_1, train_frame_data],
batch_size=batch_size, num_threads=num_threads, capacity=prefetch, min_after_dequeue=min_queue_examples)
val_data, val_video_label, val_fname, val_caption_label, val_caption_id_1, val_frame_data = \
tf.train.batch([val_data, val_video_label, val_fname, val_caption_label, val_caption_id_1, val_frame_data],
batch_size=batch_size, num_threads=1, capacity=2* batch_size)
# graph on the GPU
with tf.device("/gpu:0"):
tf_loss, tf_loss_cap, tf_loss_lat, tf_loss_vid, tf_z, tf_v_h, tf_s_h, tf_drop_type \
= model.build_model(train_data, train_frame_data, train_video_label, train_caption_id, train_caption_id_1, train_caption_label)
val_v2s_tf, _ = model.build_v2s_generator(val_data)
val_s2s_tf, _, _ = model.build_s2s_generator(val_caption_id_1)
val_s2v_tf, _, _ = model.build_s2v_generator(val_caption_id_1,
val_frame_data)
val_v2v_tf, _ = model.build_v2v_generator(val_data, val_frame_data)
sess = tf.InteractiveSession(config=tf.ConfigProto(
allow_soft_placement=True, log_device_placement=False))
# check for model file
with tf.device(cpu_device):
saver = tf.train.Saver(max_to_keep=100)
ckpt = tf.train.get_checkpoint_state(model_path)
global_step = 0
if ckpt and tf.train.checkpoint_exists(ckpt.model_checkpoint_path):
print("Reading model parameters from %s" % ckpt.model_checkpoint_path)
saver.restore(sess, ckpt.model_checkpoint_path)
# print_tensors_in_checkpoint_file(ckpt.model_checkpoint_path, "", True)
global_step = get_model_step(ckpt.model_checkpoint_path)
print 'global_step:', global_step
else:
print("Created model with fresh parameters.")
sess.run(tf.global_variables_initializer())
temp = set(tf.global_variables())
# train on the GPU
with tf.device("/gpu:0"):
## 1. weight decay
for var in tf.trainable_variables():
decay_loss = tf.multiply(tf.nn.l2_loss(var),
0.0004,
name='weight_loss')
tf.add_to_collection('losses', decay_loss)
tf.add_to_collection('losses', tf_loss)
tf_total_loss = tf.add_n(tf.get_collection('losses'),
name='total_loss')
## 2. gradient clip
optimizer = tf.train.AdamOptimizer(learning_rate)
gvs = optimizer.compute_gradients(tf_total_loss)
# when variable is not related to the loss, grad returned as None
clip_gvs = [(tf.clip_by_norm(grad, clip_norm), var)
for grad, var in gvs if grad is not None]
for grad, var in gvs:
if grad is not None:
tf.summary.histogram(var.name + '/grad', grad)
tf.summary.histogram(var.name + '/data', var)
train_op = optimizer.apply_gradients(clip_gvs)
## initialize variables added for optimizer
sess.run(tf.variables_initializer(set(tf.global_variables()) - temp))
# initialize epoch variable in queue reader
sess.run(tf.local_variables_initializer())
loss_epoch = 0
loss_epoch_cap = 0
loss_epoch_vid = 0
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
##### add summaries ######
tf.summary.histogram('video_h', tf_v_h)
tf.summary.histogram('sent_h', tf_s_h)
tf.summary.scalar('loss_vid', tf_loss_vid)
tf.summary.scalar('loss_lat', tf_loss_lat)
tf.summary.scalar('loss_caption', tf_loss_cap)
# for var in tf.trainable_variables():
# summaries.append(tf.histogram_summary(var.op.name, var))
summary_op = tf.summary.merge_all()
# write graph architecture to file
summary_writer = tf.summary.FileWriter(model_path + 'summary', sess.graph)
epoch = global_step
video_label = sess.run(train_video_label)
for step in xrange(1, n_steps + 1):
tStart = time.time()
if drop_strategy == 'keep':
drop_type = 0
elif drop_strategy == 'block_sentence':
drop_type = 1
elif drop_strategy == 'block_video':
drop_type = 2
else:
drop_type = random.randint(0, 3)
_, loss_val, loss_cap, loss_lat, loss_vid = sess.run(
[train_op, tf_loss, tf_loss_cap, tf_loss_lat, tf_loss_vid],
feed_dict={tf_drop_type: drop_type})
tStop = time.time()
print "step:", step, " Loss:", loss_val, "loss_cap:", loss_cap * caption_weight, "loss_latent:", loss_lat * latent_weight, "loss_vid:", loss_vid * video_weight
print "Time Cost:", round(tStop - tStart, 2), "s"
loss_epoch += loss_val
loss_epoch_cap += loss_cap
loss_epoch_vid += loss_vid
if step % n_epoch_steps == 0:
# if step % 3 == 0:
epoch += 1
loss_epoch /= n_epoch_steps
loss_epoch_cap /= n_epoch_steps
loss_epoch_vid /= n_epoch_steps
with tf.device(cpu_device):
saver.save(sess,
os.path.join(model_path, 'model'),
global_step=epoch)
# print 'z:', z[0, :10]
print 'epoch:', epoch, 'loss:', loss_epoch, "loss_cap:", loss_epoch_cap, "loss_lat:", loss_lat, "loss_vid:", loss_epoch_vid
loss_epoch = 0
loss_epoch_cap = 0
loss_epoch_vid = 0
######### test sentence generation ##########
n_val_steps = int(n_val_samples / batch_size)
# n_val_steps = 3
### TODO: sometimes COCO test show exceptions in the beginning of training ####
if test_v2s:
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
flist] = testing_all(sess, 1, ixtoword, val_v2s_tf, val_fname)
for i, key in enumerate(pred_dict.keys()):
print 'video:', flist[i]
for ele in gt_dict[key]:
print "GT: " + ele['caption']
print "PD: " + pred_dict[key][0]['caption']
print '-------'
print '############## video to sentence result #################'
print 'epoch:', epoch
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
_] = testing_all(sess, n_val_steps, ixtoword, val_v2s_tf,
val_fname)
scorer = COCOScorer()
total_score = scorer.score(gt_dict, pred_dict, id_list)
print '############## video to sentence result #################'
if test_s2s:
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
flist] = testing_all(sess, 1, ixtoword, val_s2s_tf, val_fname)
for i, key in enumerate(pred_dict.keys()):
print 'video:', flist[i]
for ele in gt_dict[key]:
print "GT: " + ele['caption']
print "PD: " + pred_dict[key][0]['caption']
print '-------'
print '############## sentence to sentence result #################'
print 'epoch:', epoch
[pred_sent, gt_sent, id_list, gt_dict, pred_dict,
_] = testing_all(sess, n_val_steps, ixtoword, val_s2s_tf,
val_fname)
scorer = COCOScorer()
total_score = scorer.score(gt_dict, pred_dict, id_list)
print '############## sentence to sentence result #################'
######### test video generation #############
if test_v2v:
mse_v2v = test_all_videos(sess, n_val_steps, val_frame_data,
val_v2v_tf, val_video_label,
pixel_scale_factor)
print 'epoch', epoch, 'video2video mse:', mse_v2v
if test_s2v:
mse_s2v = test_all_videos(sess, n_val_steps, val_frame_data,
val_s2v_tf, val_video_label,
pixel_scale_factor)
print 'epoch', epoch, 'caption2video mse:', mse_s2v
sys.stdout.flush()
###### summary ######
if epoch % 2 == 0:
summary = sess.run(summary_op)
summary_writer.add_summary(summary, epoch)
sys.stdout.flush()
coord.request_stop()
coord.join(threads)
print "Finally, saving the model ..."
with tf.device(cpu_device):
saver.save(sess,
os.path.join(model_path, 'model'),
global_step=n_epochs)
tStop_total = time.time()
print "Total Time Cost:", round(tStop_total - tStart_total, 2), "s"
sess.close()
