def main(cfg):
# cfg.num_classes = 1001
os.environ["CUDA_VISIBLE_DEVICES"] = cfg.gpu
output_dir = cfg.output_dir
os_utils.touch_dir(output_dir)
args_file = os.path.join(cfg.output_dir, 'args.json')
with open(args_file, 'w') as f:
json.dump(vars(cfg), f, ensure_ascii=False, indent=2, sort_keys=True)
log_file = os.path.join(cfg.output_dir, cfg.log_filename + '.txt')
logger = log_utils.create_logger(log_file)
img_name_ext = cfg.img_name
img_name, _ = os.path.splitext(img_name_ext)
datasets_dir = './input_imgs'
test_img = imageio.imread('{}/{}'.format(datasets_dir, img_name_ext))
test_img = cv2.resize(test_img, (const.frame_height, const.frame_height))
with tf.Graph().as_default():
images_ph = tf.compat.v1.placeholder(tf.float32,
shape=(None, const.frame_height,
const.frame_height,
const.num_channels),
name='input_img')
lbls_ph = tf.compat.v1.placeholder(tf.int32,
shape=(None, cfg.num_classes),
name='class_lbls')
logits_ph = tf.compat.v1.placeholder(tf.float32,
shape=(None, cfg.num_classes),
name='logits_lbls')
per_class_logits_ph = tf.compat.v1.placeholder(tf.float32,
shape=(None,
cfg.num_classes),
name='logits_lbls')
input_ph = nn_utils.adjust_color_space(images_ph, cfg.preprocess_func)
network_class = locate(cfg.network_name)
model = network_class(cfg, images_ph=input_ph, lbls_ph=lbls_ph)
pre_atten_feat_map_tf = tf.compat.v1.get_default_graph(
).get_tensor_by_name(cfg.replicate_net_at)
pre_atten_feat_map_tf_shape = pre_atten_feat_map_tf.shape
sub_feat_map_ph = tf.compat.v1.placeholder(
tf.float32,
shape=[
None, pre_atten_feat_map_tf_shape[1],
pre_atten_feat_map_tf_shape[2], pre_atten_feat_map_tf_shape[3]
],
name='feat_map_input')
sub_network_class = locate(cfg.sub_network_name)
sub_model = sub_network_class(cfg,
images_ph=sub_feat_map_ph,
lbls_ph=lbls_ph)
sub_logits = sub_model.val_logits
logits = model.val_logits
sess = tf.compat.v1.InteractiveSession()
atten_filter_position = cfg.atten_filter_position
tf_atten_var = [
v for v in tf.compat.v1.global_variables()
if atten_filter_position.format('atten') in v.name
][-1]
## Didn't make a difference for tf_atten_var becuase tf_atten_var is created using get_varibale, i.e., shared
tf_gate_atten_var = [
v for v in tf.compat.v1.global_variables()
if atten_filter_position.format('gate') in v.name
][-1]
# print(tf_gate_atten_var)
# optimizer = tf.train.AdamOptimizer(0.01)
global_step = tf.Variable(0, name='global_step', trainable=False)
logger.info('Learning rate {} {}'.format(cfg.learning_rate,
cfg.max_iters))
learning_rate = tf_utils.poly_lr(global_step, cfg)
optimizer = tf.compat.v1.train.AdamOptimizer(learning_rate)
class_specific = True if cfg.caf_variant == 'cls_specific' else False
if class_specific:
logger.info(
'Solving class specific optimization problem -- classification network'
)
mult_logits_2 = per_class_logits_ph * sub_logits
loss_sub = tf.reduce_sum(mult_logits_2)
grads = optimizer.compute_gradients(loss_sub,
var_list=[tf_atten_var])
train_op = optimizer.apply_gradients(grads,
global_step=global_step)
else:
raise NotImplementedError('cls_oblivious version implemented yet')
# train_op = optimizer.minimize(loss, var_list=[tf_atten_var])
tf.compat.v1.global_variables_initializer().run()
ckpt_file = tf.train.latest_checkpoint(output_dir)
logger.info('Model Path {}'.format(ckpt_file))
saver = tf.compat.v1.train.Saver(
) # saves variables learned during training
load_model_msg = model.load_model(output_dir,
ckpt_file,
sess,
saver,
load_logits=True)
logger.info(load_model_msg)
class_predictions, ground_logits = sess.run(
[model.val_class_prediction, logits],
feed_dict={images_ph: np.expand_dims(test_img, 0)})
class_predictions = class_predictions[0]
# print('Class Prediction {}'.format(imagenet_lbls[class_predictions]))
k = 1
top_k = np.argsort(np.squeeze(ground_logits))[::-1][:k]
# top_k = [235,282,94,1,225]
logger.info('Top K={} {}'.format(k, [imagenet_lbls[i] for i in top_k]))
filter_type = cfg.filter_type
if filter_type == 'gauss':
rand_initilzalier = np.random.normal(
0, 1, (tf_atten_var.shape[0], tf_atten_var.shape[1]))
else:
rand_initilzalier = np.random.normal(
0, 1, (tf_atten_var.shape[0], tf_atten_var.shape[1], 1))
close_gate = tf.compat.v1.assign(tf_gate_atten_var, False)
open_gate = tf.compat.v1.assign(tf_gate_atten_var, True)
random_init = tf.compat.v1.assign(tf_atten_var, rand_initilzalier)
lr_reset = tf.compat.v1.assign(global_step, 0)
MAX_INT = np.iinfo(np.int16).max
# output_dir = cfg.output_dir
for top_i in top_k:
# top_i = 207 # To control which top_i to work on directly
sess.run([open_gate, random_init, lr_reset])
# sess.run(open_gate)
iteration = 0
prev_loss = MAX_INT
event_gif_images = []
per_class_maximization = np.ones((1, cfg.num_classes))
per_class_maximization[0, top_i] = -1
while iteration < cfg.max_iters:
if iteration == 0:
sess.run([close_gate])
_pre_atten_feat_map_tf, _atten_var = sess.run(
[pre_atten_feat_map_tf, tf_atten_var],
feed_dict={
# sub_feat_map_ph: _pre_atten_feat_map_tf,
images_ph: np.expand_dims(test_img, 0),
per_class_logits_ph: per_class_maximization
})
sess.run([open_gate])
_atten_var, _sub_logits, _loss, _ = sess.run(
[tf_atten_var, sub_logits, loss_sub, train_op],
feed_dict={
sub_feat_map_ph: _pre_atten_feat_map_tf,
# images_ph:np.expand_dims(img_crops[crop_idx,:,:,:],0),
per_class_logits_ph: per_class_maximization
})
if iteration % 50 == 0:
logger.info('Iter {0:2d}: {1:.5f} Top {2:3d} {3}'.format(
iteration, _loss, top_i, imagenet_lbls[top_i]))
# print(np.round(np.reshape(_atten_var,(7,7)),2))
if cfg.save_gif:
frame_mask = normalize_filter(filter_type, _atten_var,
tf_atten_var.shape[0],
tf_atten_var.shape[1])
if class_specific:
#
# heatmap_utils.save_heatmap(frame_mask,save=output_dir + img_name +'_msk_cls_{}_{}.png'.format(top_i,filter_type))
plt = heatmap_utils.apply_heatmap(
test_img / 255.0,
frame_mask,
alpha=0.7,
save=output_dir + img_name +
'_cls_{}_{}.png'.format(top_i, filter_type),
axis='off',
cmap='bwr')
else:
plt = heatmap_utils.apply_heatmap(
test_img / 255.0,
frame_mask,
alpha=0.7,
save=output_dir + img_name +
'_{}.png'.format(filter_type),
axis='off',
cmap='bwr')
fig = plt.gcf()
data = np.fromstring(fig.canvas.tostring_rgb(),
dtype=np.uint8,
sep='')
w, h = fig.canvas.get_width_height()
data_img = data.reshape((h, w, 3))
event_gif_images.append(data_img)
# imageio.imwrite(dump_dir + '{}_test.jpg'.format(iteration),data_img)
plt.close()
if np.abs(_loss - prev_loss) < 10e-5:
break
prev_loss = _loss
iteration += 1
frame_mask = normalize_filter(filter_type, _atten_var,
tf_atten_var.shape[0],
tf_atten_var.shape[1])
if class_specific:
# imageio.imwrite(output_dir + img_name + '_msk_cls_{}_{}.png'.format(top_i, filter_type), frame_mask)
heatmap_utils.apply_heatmap(
test_img / 255.0,
frame_mask,
alpha=0.6,
save=output_dir + img_name +
'_cls_{}_{}.png'.format(top_i, filter_type),
axis='off',
cmap='bwr')
else:
heatmap_utils.apply_heatmap(test_img / 255.0,
frame_mask,
alpha=0.6,
save=output_dir + img_name +
'_{}.png'.format(filter_type),
axis='off',
cmap='bwr')
if cfg.save_gif:
if class_specific:
imageio.mimsave(
output_dir + img_name + '_cls_{}_{}.gif'.format(
top_i,
atten_filter_position[:-2].format('').replace(
'/', '')),
event_gif_images,
duration=1.0)
else:
imageio.mimsave(
output_dir + img_name + '_cls_{}_{}.gif'.format(
filter_type,
atten_filter_position[:-2].format('').replace(
'/', '')),
event_gif_images,
duration=1.0)
def main(argv):
cfg = BaseConfig().parse(argv)
os.environ["CUDA_VISIBLE_DEVICES"] = cfg.gpu
img_generator_class = locate(cfg.db_tuple_loader)
args = dict()
args['db_path'] = cfg.db_path
args['tuple_loader_queue_size'] = cfg.tuple_loader_queue_size
args['preprocess_func'] = cfg.preprocess_func
args['batch_size'] = cfg.batch_size
args['shuffle'] = False
args['img_size'] = const.max_frame_size
args['gen_hot_vector'] = True
args['csv_file'] = cfg.train_csv_file
train_iter = img_generator_class(args)
args['csv_file'] = cfg.test_csv_file
val_iter = img_generator_class(args)
train_imgs, train_lbls = train_iter.imgs_and_lbls()
val_imgs, val_lbls = val_iter.imgs_and_lbls()
# Where to save the trained model
save_model_dir = cfg.checkpoint_dir
model_basename = os.path.basename(save_model_dir)
touch_dir(save_model_dir)
## Log experiment
args_file = os.path.join(cfg.checkpoint_dir, 'args.json')
with open(args_file, 'w') as f:
json.dump(vars(cfg), f, ensure_ascii=False, indent=2, sort_keys=True)
# os_utils.touch_dir(save_model_dir)
log_file = os.path.join(cfg.checkpoint_dir, cfg.log_filename + '.txt')
os_utils.touch_dir(cfg.checkpoint_dir)
logger = log_utils.create_logger(log_file)
with tf.Graph().as_default():
# Create train and val dataset following tensorflow Data API
## A dataset element has an image and lable
train_dataset = TensorflowTupleLoader(train_imgs, train_lbls,cfg, is_training=True).dataset
val_dataset = TensorflowTupleLoader(val_imgs, val_lbls,cfg, is_training=False, batch_size=cfg.batch_size,
repeat=False).dataset
handle = tf.placeholder(tf.string, shape=[])
iterator = tf.data.Iterator.from_string_handle(
handle, train_dataset.output_types, train_dataset.output_shapes)
images_ph, lbls_ph = iterator.get_next()
training_iterator = train_dataset.make_one_shot_iterator()
validation_iterator = val_dataset.make_initializable_iterator()
## Load a pretrained network {resnet_v2 or densenet161} based on config.network_name configuration
network_class = locate(cfg.network_name)
model = network_class(cfg, is_training=True, images_ph=images_ph, lbls_ph=lbls_ph)
trainable_vars = tf.trainable_variables()
if cfg.caffe_iter_size > 1: ## Accumulated Gradient
## Creation of a list of variables with the same shape as the trainable ones
# initialized with 0s
accum_vars = [tf.Variable(tf.zeros_like(tv.initialized_value()), trainable=False) for tv in trainable_vars]
zero_ops = [tv.assign(tf.zeros_like(tv)) for tv in accum_vars]
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
global_step = tf.Variable(0, name='global_step', trainable=False)
learning_rate = tf_utils.poly_lr(global_step,cfg)
optimizer = tf.train.MomentumOptimizer(learning_rate, momentum=0.9)
if cfg.caffe_iter_size > 1: ## Accumulated Gradient
grads = optimizer.compute_gradients(model.train_loss, trainable_vars)
# Adds to each element from the list you initialized earlier with zeros its gradient (works because accum_vars and gvs are in the same order)
accum_ops = [accum_vars[i].assign_add(gv[0]) for i, gv in enumerate(grads)]
iter_size = cfg.caffe_iter_size
# Define the training step (part with variable value update)
train_op = optimizer.apply_gradients([(accum_vars[i] / iter_size, gv[1]) for i, gv in enumerate(grads)],
global_step=global_step)
else: # If accumulated gradient disabled, do regular training
grads = optimizer.compute_gradients(model.train_loss)
train_op = optimizer.apply_gradients(grads, global_step=global_step)
# logger.info('=========================================================')
# for v in tf.trainable_variables():
# mprint('trainable_variables: {0} \t {1}'.format(str(v.name),str(v.shape)))
sess = tf.InteractiveSession()
tf.global_variables_initializer().run()
tf.local_variables_initializer().run()
training_handle = sess.run(training_iterator.string_handle())
validation_handle = sess.run(validation_iterator.string_handle())
# now = datetime.now()
# if (config.tensorbaord_file == None):
# tb_path = config.tensorbaord_dir + now.strftime("%Y%m%d-%H%M%S")
# else:
# tb_path = config.tensorbaord_dir + config.tensorbaord_file
start_iter = 1 # No Resume in this code version
# train_writer = tf.summary.FileWriter(tb_path, sess.graph)
saver = tf.train.Saver() # saves variables learned during training
ckpt_file = os.path.join(save_model_dir, cfg.checkpoint_filename)
print('Model Path ', ckpt_file)
load_model_msg = model.load_model(save_model_dir, ckpt_file, sess, saver, is_finetuning=True)
logger.info(load_model_msg)
val_loss = tf.summary.scalar('Val_Loss', model.val_loss)
val_acc_op = tf.summary.scalar('Batch_Val_Acc', model.val_accuracy)
model_acc_op = tf.summary.scalar('Split_Val_Accuracy', model.val_accumulated_accuracy)
logger.info('Start Training ***********')
best_acc = 0
best_model_step = 0
for current_iter in range(start_iter, cfg.train_iters+1):
start_time_train = time.time()
feed_dict = {handle: training_handle}
## Here is where training and backpropagation start
# In case accumulated gradient enabled, i.e. config.caffe_iter_size > 1
for mini_batch in range(cfg.caffe_iter_size - 1):
sess.run(accum_ops, feed_dict)
model_loss_value, accuracy_value, _ = sess.run([model.train_loss, model.train_accuracy, train_op],
feed_dict)
# In case accumulated gradient enabled, reset shadow variables
if cfg.caffe_iter_size > 1:
sess.run(zero_ops)
## Here is where training and backpropagation end
train_time = time.time() - start_time_train
if (current_iter % cfg.logging_threshold == 0 or current_iter ==1):
logger.info(
'i {0:04d} loss {1:4f} Acc {2:2f} Batch Time {3:3f}'.format(current_iter, model_loss_value, accuracy_value,
train_time))
if (current_iter % cfg.test_interval == 0):
# run_metadata = tf.RunMetadata()
tf.local_variables_initializer().run()
sess.run(validation_iterator.initializer)
while True:
try:
feed_dict = {handle: validation_handle}
val_loss_op, batch_accuracy, accuracy_op, _val_acc_op, _val_acc, c_cnf_mat = sess.run(
[val_loss, model.val_accuracy, model_acc_op, val_acc_op, model.val_accumulated_accuracy,
model.val_confusion_mat], feed_dict)
except tf.errors.OutOfRangeError:
logger.info('Val Acc {0}'.format(_val_acc))
break
# train_writer.add_run_metadata(run_metadata, 'step%03d' % current_iter)
# train_writer.add_summary(val_loss_op, current_iter)
# train_writer.add_summary(_val_acc_op, current_iter)
# train_writer.add_summary(accuracy_op, current_iter)
#
# train_writer.flush()
if (current_iter % cfg.logging_threshold == 0):
saver.save(sess, ckpt_file)
if best_acc < _val_acc:
saver.save(sess, ckpt_file + 'best')
best_acc = _val_acc
best_model_step = current_iter
## Early dropping style.
logger.info('Best Acc {0} at {1} == {2}'.format(best_acc, best_model_step, model_basename))
saver.save(sess, ckpt_file) ## Save final ckpt before closing
sess.close()
def main(argv):
cfg = BaseConfig().parse(argv)
os.environ["CUDA_VISIBLE_DEVICES"] = cfg.gpu
save_model_dir = cfg.checkpoint_dir
model_basename = os.path.basename(save_model_dir)
touch_dir(save_model_dir)
args_file = os.path.join(cfg.checkpoint_dir, 'args.json')
with open(args_file, 'w') as f:
json.dump(vars(cfg), f, ensure_ascii=False, indent=2, sort_keys=True)
# os_utils.touch_dir(save_model_dir)
log_file = os.path.join(cfg.checkpoint_dir, cfg.log_filename + '.txt')
os_utils.touch_dir(cfg.checkpoint_dir)
logger = log_utils.create_logger(log_file)
img_generator_class = locate(cfg.db_tuple_loader)
args = dict()
args['db_path'] = cfg.db_path
args['tuple_loader_queue_size'] = cfg.tuple_loader_queue_size
args['preprocess_func'] = cfg.preprocess_func
args['batch_size'] = cfg.batch_size
args['shuffle'] = False
args['csv_file'] = cfg.train_csv_file
args['img_size'] = const.max_frame_size
args['gen_hot_vector'] = True
train_iter = img_generator_class(args)
args['batch_size'] = cfg.batch_size
args['csv_file'] = cfg.test_csv_file
val_iter = img_generator_class(args)
trn_images, trn_lbls = train_iter.imgs_and_lbls()
val_imgs, val_lbls = val_iter.imgs_and_lbls()
with tf.Graph().as_default():
if cfg.train_mode == 'semi_hard' or cfg.train_mode == 'hard' or cfg.train_mode == 'cntr':
train_dataset = TripletTupleLoader(trn_images, trn_lbls,
cfg).dataset
elif cfg.train_mode == 'vanilla':
train_dataset = QuickTupleLoader(trn_images,
trn_lbls,
cfg,
is_training=True,
shuffle=True,
repeat=True).dataset
else:
raise NotImplementedError('{} is not a valid train mode'.format(
cfg.train_mode))
val_dataset = QuickTupleLoader(val_imgs,
val_lbls,
cfg,
is_training=False,
repeat=False).dataset
handle = tf.placeholder(tf.string, shape=[])
iterator = tf.data.Iterator.from_string_handle(
handle, train_dataset.output_types, train_dataset.output_shapes)
images_ph, lbls_ph = iterator.get_next()
network_class = locate(cfg.network_name)
model = network_class(cfg, images_ph=images_ph, lbls_ph=lbls_ph)
# Which loss fn to impose. For example, softmax only is applied in vanilla mode,
# while softmax + semi-hard triplet is applied in semi_hard mode.
if cfg.train_mode == 'semi_hard':
pre_logits = model.train_pre_logits
_, w, h, channels = pre_logits.shape
embed_dim = cfg.emb_dim
embedding_net = ConvEmbed(emb_dim=embed_dim,
n_input=channels,
n_h=h,
n_w=w)
embedding = embedding_net.forward(pre_logits)
embedding = tf.nn.l2_normalize(embedding, axis=-1, epsilon=1e-10)
margin = cfg.margin
gt_lbls = tf.argmax(model.gt_lbls, 1)
metric_loss = triplet_semi.triplet_semihard_loss(
gt_lbls, embedding, margin)
logger.info('Triplet loss lambda {}, with margin {}'.format(
cfg.triplet_loss_lambda, margin))
total_loss = model.train_loss + cfg.triplet_loss_lambda * tf.reduce_mean(
metric_loss)
elif cfg.train_mode == 'hard':
pre_logits = model.train_pre_logits
_, w, h, channels = pre_logits.shape
embed_dim = cfg.emb_dim
embedding_net = ConvEmbed(emb_dim=embed_dim,
n_input=channels,
n_h=h,
n_w=w)
embedding = embedding_net.forward(pre_logits)
embedding = tf.nn.l2_normalize(embedding, axis=-1, epsilon=1e-10)
margin = cfg.margin
logger.info('Triplet loss lambda {}, with margin {}'.format(
cfg.triplet_loss_lambda, margin))
gt_lbls = tf.argmax(model.gt_lbls, 1)
metric_loss = triplet_hard.batch_hard(gt_lbls, embedding, margin)
total_loss = model.train_loss + cfg.triplet_loss_lambda * tf.reduce_mean(
metric_loss)
elif cfg.train_mode == 'cntr':
pre_logits = model.train_pre_logits
_, w, h, channels = pre_logits.shape
embed_dim = cfg.emb_dim
embedding_net = ConvEmbed(emb_dim=embed_dim,
n_input=channels,
n_h=h,
n_w=w)
embedding = embedding_net.forward(pre_logits)
embedding = tf.nn.l2_normalize(embedding, axis=-1, epsilon=1e-10)
CENTER_LOSS_LAMBDA = 0.003
CENTER_LOSS_ALPHA = 0.5
num_fg_classes = cfg.num_classes
gt_lbls = tf.argmax(model.gt_lbls, 1)
center_loss_order, centroids, centers_update_op, appear_times, diff = center_loss.get_center_loss(
embedding, gt_lbls, CENTER_LOSS_ALPHA, num_fg_classes)
# sample_centroid = tf.reshape(tf.gather(centroids, gt_lbls), [-1, config.emb_dim])
# center_loss_order = center_loss.center_loss(sample_centroid , embedding)
logger.info('Center loss lambda {}'.format(CENTER_LOSS_LAMBDA))
total_loss = model.train_loss + CENTER_LOSS_LAMBDA * tf.reduce_mean(
center_loss_order)
elif cfg.train_mode == 'vanilla':
total_loss = model.train_loss
logger.info('Train Mode {}'.format(cfg.train_mode))
# variables_to_train = model.var_2_train();
# logger.info('variables_to_train ' + str(variables_to_train))
trainable_vars = tf.trainable_variables()
if cfg.caffe_iter_size > 1: ## Accumulated Gradient
## Creation of a list of variables with the same shape as the trainable ones
# initialized with 0s
accum_vars = [
tf.Variable(tf.zeros_like(tv.initialized_value()),
trainable=False) for tv in trainable_vars
]
zero_ops = [tv.assign(tf.zeros_like(tv)) for tv in accum_vars]
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
if cfg.train_mode == const.Train_Mode.CNTR:
update_ops.append(centers_update_op)
# print(update_ops)
with tf.control_dependencies(update_ops):
global_step = tf.Variable(0, name='global_step', trainable=False)
learning_rate = tf_utils.poly_lr(global_step, cfg)
optimizer = tf.train.MomentumOptimizer(learning_rate, momentum=0.9)
if cfg.caffe_iter_size > 1: ## Accumulated Gradient
# grads = tf.Print(grads,[grads],'Grad Print');
grads = optimizer.compute_gradients(total_loss, trainable_vars)
# Adds to each element from the list you initialized earlier with zeros its gradient (works because accum_vars and gvs are in the same order)
accum_ops = [
accum_vars[i].assign_add(gv[0])
for i, gv in enumerate(grads)
]
iter_size = cfg.caffe_iter_size
# Define the training step (part with variable value update)
train_op = optimizer.apply_gradients(
[(accum_vars[i] / iter_size, gv[1])
for i, gv in enumerate(grads)],
global_step=global_step)
else:
grads = optimizer.compute_gradients(total_loss)
train_op = optimizer.apply_gradients(grads,
global_step=global_step)
sess = tf.InteractiveSession()
training_iterator = train_dataset.make_one_shot_iterator()
validation_iterator = val_dataset.make_initializable_iterator()
training_handle = sess.run(training_iterator.string_handle())
validation_handle = sess.run(validation_iterator.string_handle())
tb_path = save_model_dir
logger.info(tb_path)
start_iter = tb_utils.get_latest_iteration(tb_path)
train_writer = tf.summary.FileWriter(tb_path, sess.graph)
tf.global_variables_initializer().run()
saver = tf.train.Saver() # saves variables learned during training
ckpt_file = tf.train.latest_checkpoint(save_model_dir)
logger.info('Model Path {}'.format(ckpt_file))
load_model_msg = model.load_model(save_model_dir,
ckpt_file,
sess,
saver,
load_logits=False)
logger.info(load_model_msg)
ckpt_file = os.path.join(save_model_dir, cfg.checkpoint_filename)
val_loss = tf.summary.scalar('Val_Loss', model.val_loss)
val_acc_op = tf.summary.scalar('Batch_Val_Acc', model.val_accuracy)
model_acc_op = tf.summary.scalar('Split_Val_Accuracy',
model.val_accumulated_accuracy)
best_model_step = 0
best_acc = 0
logger.info('Start Training from {}, till {}'.format(
start_iter, cfg.train_iters))
# Start Training
for step in range(start_iter + 1, cfg.train_iters + 1):
start_time_train = time.time()
# Update network weights while supporting caffe_iter_size
for mini_batch in range(cfg.caffe_iter_size - 1):
feed_dict = {handle: training_handle}
model_loss_value, accuracy_value, _ = sess.run(
[model.train_loss, model.train_accuracy, accum_ops],
feed_dict)
feed_dict = {handle: training_handle}
model_loss_value, accuracy_value, _ = sess.run(
[model.train_loss, model.train_accuracy, train_op], feed_dict)
if cfg.caffe_iter_size > 1: ## Accumulated Gradient
sess.run(zero_ops)
train_time = time.time() - start_time_train
if (step == 1 or step % cfg.logging_threshold == 0):
logger.info(
'i {0:04d} loss {1:4f} Acc {2:2f} Batch Time {3:3f}'.
format(step, model_loss_value, accuracy_value, train_time))
if (step % cfg.test_interval == 0):
run_metadata = tf.RunMetadata()
tf.local_variables_initializer().run()
sess.run(validation_iterator.initializer)
_val_acc_op = 0
while True:
try:
# Eval network on validation/testing split
feed_dict = {handle: validation_handle}
val_loss_op, batch_accuracy, accuracy_op, _val_acc_op, _val_acc, c_cnf_mat, macro_acc = sess.run(
[
val_loss, model.val_accuracy, model_acc_op,
val_acc_op, model.val_accumulated_accuracy,
model.val_confusion_mat,
model.val_per_class_acc_acc
], feed_dict)
except tf.errors.OutOfRangeError:
logger.info('Val Acc {0}, Macro Acc: {1}'.format(
_val_acc, macro_acc))
break
train_writer.add_run_metadata(run_metadata,
'step%03d' % step)
train_writer.add_summary(val_loss_op, step)
train_writer.add_summary(_val_acc_op, step)
train_writer.add_summary(accuracy_op, step)
train_writer.flush()
if (step % 100 == 0):
saver.save(sess, ckpt_file)
if best_acc < _val_acc:
saver.save(sess, ckpt_file + 'best')
best_acc = _val_acc
best_model_step = step
logger.info('Best Acc {0} at {1} == {2}'.format(
best_acc, best_model_step, model_basename))
logger.info('Triplet loss lambda {}'.format(cfg.triplet_loss_lambda))
logger.info('Mode {}'.format(cfg.train_mode))
logger.info('Loop complete')
sess.close()
def main():
img_generator_class = locate(config.db_tuple_loader)
args = dict()
args['csv_file'] = config.train_csv_file
train_iter = img_generator_class(args)
args['csv_file'] = config.test_csv_file
val_iter = img_generator_class(args)
train_imgs, train_lbls = train_iter.imgs_and_lbls()
val_imgs, val_lbls = val_iter.imgs_and_lbls()
save_model_dir = config.model_save_path
with tf.Graph().as_default():
train_dataset = TensorflowTupleLoader(train_imgs,
train_lbls,
is_training=True).dataset
val_dataset = TensorflowTupleLoader(val_imgs,
val_lbls,
is_training=False,
batch_size=config.batch_size,
repeat=False).dataset
handle = tf.placeholder(tf.string, shape=[])
iterator = tf.data.Iterator.from_string_handle(
handle, train_dataset.output_types, train_dataset.output_shapes)
images_ph, lbls_ph = iterator.get_next()
training_iterator = train_dataset.make_one_shot_iterator()
validation_iterator = val_dataset.make_initializable_iterator()
network_class = locate(config.network_name)
model = network_class(num_classes=config.num_classes,
is_training=True,
images_ph=images_ph,
lbls_ph=lbls_ph)
trainable_vars = tf.trainable_variables()
if config.caffe_iter_size > 1: ## Accumulated Gradient
## Creation of a list of variables with the same shape as the trainable ones
# initialized with 0s
accum_vars = [
tf.Variable(tf.zeros_like(tv.initialized_value()),
trainable=False) for tv in trainable_vars
]
zero_ops = [tv.assign(tf.zeros_like(tv)) for tv in accum_vars]
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
global_step = tf.Variable(0, name='global_step', trainable=False)
learning_rate = tf_utils.poly_lr(global_step)
optimizer = tf.train.MomentumOptimizer(learning_rate, momentum=0.9)
if config.caffe_iter_size > 1: ## Accumulated Gradient
grads = optimizer.compute_gradients(model.train_loss,
trainable_vars)
# Adds to each element from the list you initialized earlier with zeros its gradient (works because accum_vars and gvs are in the same order)
accum_ops = [
accum_vars[i].assign_add(gv[0])
for i, gv in enumerate(grads)
]
iter_size = config.caffe_iter_size
# Define the training step (part with variable value update)
train_op = optimizer.apply_gradients(
[(accum_vars[i] / iter_size, gv[1])
for i, gv in enumerate(grads)],
global_step=global_step)
else:
grads = optimizer.compute_gradients(model.train_loss)
train_op = optimizer.apply_gradients(grads,
global_step=global_step)
# logger.info('=========================================================')
# for v in tf.trainable_variables():
# mprint('trainable_variables: {0} \t {1}'.format(str(v.name),str(v.shape)))
sess = tf.InteractiveSession()
tf.global_variables_initializer().run()
tf.local_variables_initializer().run()
training_handle = sess.run(training_iterator.string_handle())
validation_handle = sess.run(validation_iterator.string_handle())
now = datetime.now()
if (config.tensorbaord_file == None):
tb_path = config.tensorbaord_dir + now.strftime("%Y%m%d-%H%M%S")
else:
tb_path = config.tensorbaord_dir + config.tensorbaord_file
start_iter = 0 # No Resume in this code version
train_writer = tf.summary.FileWriter(tb_path, sess.graph)
saver = tf.train.Saver() # saves variables learned during training
ckpt_file = os.path.join(save_model_dir, config.model_save_name)
print('Model Path ', ckpt_file)
load_model_msg = model.load_model(save_model_dir,
ckpt_file,
sess,
saver,
is_finetuning=True)
mprint(load_model_msg)
val_loss = tf.summary.scalar('Val_Loss', model.val_loss)
val_acc_op = tf.summary.scalar('Batch_Val_Acc', model.val_accuracy)
model_acc_op = tf.summary.scalar('Split_Val_Accuracy',
model.val_accumulated_accuracy)
mprint('Start Training ***********')
best_acc = 0
best_model_step = 0
for current_iter in range(start_iter, config.max_iter):
start_time_train = time.time()
for mini_batch in range(config.caffe_iter_size - 1):
feed_dict = {handle: training_handle}
sess.run(accum_ops, feed_dict)
feed_dict = {handle: training_handle}
model_loss_value, accuracy_value, _ = sess.run(
[model.train_loss, model.train_accuracy, train_op], feed_dict)
if config.caffe_iter_size > 1: ## Accumulated Gradient
sess.run(zero_ops)
train_time = time.time() - start_time_train
if (current_iter % config.logging_threshold == 0):
mprint('i {0:04d} loss {1:4f} Acc {2:2f} Batch Time {3:3f}'.
format(current_iter, model_loss_value, accuracy_value,
train_time))
if (current_iter != 0):
run_metadata = tf.RunMetadata()
tf.local_variables_initializer().run()
sess.run(validation_iterator.initializer)
while True:
try:
feed_dict = {handle: validation_handle}
val_loss_op, batch_accuracy, accuracy_op, _val_acc_op, _val_acc, c_cnf_mat = sess.run(
[
val_loss, model.val_accuracy, model_acc_op,
val_acc_op, model.val_accumulated_accuracy,
model.val_confusion_mat
], feed_dict)
except tf.errors.OutOfRangeError:
mprint('Val Acc {0} {1}'.format(
_val_acc, batch_accuracy))
break
train_writer.add_run_metadata(run_metadata,
'step%03d' % current_iter)
train_writer.add_summary(val_loss_op, current_iter)
train_writer.add_summary(_val_acc_op, current_iter)
train_writer.add_summary(accuracy_op, current_iter)
train_writer.flush()
if (current_iter % config.logging_threshold == 0):
saver.save(sess, ckpt_file)
if best_acc < _val_acc:
saver.save(sess, ckpt_file + 'best')
best_acc = _val_acc
best_model_step = current_iter
## Early dropping style.
mprint('Best Acc {0} at {1} == {2}'.format(
best_acc, best_model_step, config.model_filename))
saver.save(sess, ckpt_file) ## Save final ckpt before closing
ckpt = os.path.join(save_model_dir, str(current_iter),
config.model_save_name)
saver.save(sess, ckpt)
sess.close()
