def train(self, max_steps=30001, batch_size=3):
# For train the bayes, the FLAG_OPT SHOULD BE SGD, BUT FOR TRAIN THE NORMAL SEGNET,
# THE FLAG_OPT SHOULD BE ADAM!!!
image_filename, label_filename = get_filename_list(self.train_file, self.config)
val_image_filename, val_label_filename = get_filename_list(self.val_file, self.config)
with self.graph.as_default():
if self.images_tr is None:
self.images_tr, self.labels_tr = dataset_inputs(image_filename, label_filename, batch_size, self.config)
self.images_val, self.labels_val = dataset_inputs(val_image_filename, val_label_filename, batch_size,
self.config)
loss, accuracy, prediction = cal_loss(logits=self.logits, labels=self.labels_pl,
number_class=self.num_classes)
train, global_step = train_op(total_loss=loss, opt=self.opt)
summary_op = tf.summary.merge_all()
with self.sess.as_default():
self.sess.run(tf.local_variables_initializer())
self.sess.run(tf.global_variables_initializer())
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(coord=coord)
# The queue runners basic reference:
# https://www.tensorflow.org/versions/r0.12/how_tos/threading_and_queues
train_writer = tf.summary.FileWriter(self.tb_logs, self.sess.graph)
for step in range(max_steps):
print("OK")
image_batch, label_batch = self.sess.run([self.images_tr, self.labels_tr])
feed_dict = {self.inputs_pl: image_batch,
self.labels_pl: label_batch,
self.is_training_pl: True,
self.keep_prob_pl: 0.5,
self.with_dropout_pl: True,
self.batch_size_pl: batch_size}
_, _loss, _accuracy, summary = self.sess.run([train, loss, accuracy, summary_op],
feed_dict=feed_dict)
self.train_loss.append(_loss)
self.train_accuracy.append(_accuracy)
print("Iteration {}: Train Loss{:6.3f}, Train Accu {:6.3f}".format(step, self.train_loss[-1],
self.train_accuracy[-1]))
if step % 100 == 0:
conv_classifier = self.sess.run(self.logits, feed_dict=feed_dict)
print('per_class accuracy by logits in training time',
per_class_acc(conv_classifier, label_batch, self.num_classes))
# per_class_acc is a function from utils
train_writer.add_summary(summary, step)
if step % 1000 == 0:
print("start validating.......")
_val_loss = []
_val_acc = []
hist = np.zeros((self.num_classes, self.num_classes))
for test_step in range(int(20)):
fetches_valid = [loss, accuracy, self.logits]
image_batch_val, label_batch_val = self.sess.run([self.images_val, self.labels_val])
feed_dict_valid = {self.inputs_pl: image_batch_val,
self.labels_pl: label_batch_val,
self.is_training_pl: True,
self.keep_prob_pl: 1.0,
self.with_dropout_pl: False,
self.batch_size_pl: batch_size}
# since we still using mini-batch, so in the batch norm we set phase_train to be
# true, and because we didin't run the trainop process, so it will not update
# the weight!
_loss, _acc, _val_pred = self.sess.run(fetches_valid, feed_dict_valid)
_val_loss.append(_loss)
_val_acc.append(_acc)
hist += get_hist(_val_pred, label_batch_val)
print_hist_summary(hist)
self.val_loss.append(np.mean(_val_loss))
self.val_acc.append(np.mean(_val_acc))
print(
"Iteration {}: Train Loss {:6.3f}, Train Acc {:6.3f}, Val Loss {:6.3f}, Val Acc {:6.3f}".format(
step, self.train_loss[-1], self.train_accuracy[-1], self.val_loss[-1],
self.val_acc[-1]))
coord.request_stop()
coord.join(threads)
def train(self):
image_filename, label_filename = get_filename_list(self.train_file)
val_image_filename, val_label_filename = get_filename_list(
self.val_file)
if self.images_tr is None:
self.images_tr, self.labels_tr = dataset_inputs(
image_filename, label_filename, FLAGS.batch_size, self.input_w,
self.input_h, self.input_c)
self.images_val, self.labels_val = dataset_inputs(
val_image_filename, val_label_filename, FLAGS.batch_size,
self.input_w, self.input_h, self.input_c)
loss, accuracy, predictions = cal_loss(logits=self.logits,
labels=self.labels_pl,
n_classes=self.n_classes)
train, global_step = train_op(loss, FLAGS.learning_rate)
tf.summary.scalar("global_step", global_step)
tf.summary.scalar("total loss", loss)
# Calculate total number of trainable parameters
total_parameters = 0
for variable in tf.trainable_variables():
shape = variable.get_shape()
variable_parameters = 1
for dim in shape:
variable_parameters *= dim.value
total_parameters += variable_parameters
print('Total Trainable Parameters: ', total_parameters)
with tf.train.SingularMonitoredSession(
# save/load model state
checkpoint_dir=FLAGS.runtime_dir,
hooks=[
tf.train.StopAtStepHook(last_step=FLAGS.n_epochs),
tf.train.CheckpointSaverHook(
checkpoint_dir=FLAGS.runtime_dir,
save_steps=FLAGS.checkpoint_frequency,
saver=tf.train.Saver()),
tf.train.SummarySaverHook(
save_steps=FLAGS.summary_frequency,
output_dir=FLAGS.runtime_dir,
scaffold=tf.train.Scaffold(
summary_op=tf.summary.merge_all()),
)
],
config=tf.ConfigProto(log_device_placement=True)) as mon_sess:
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(coord=coord, sess=mon_sess)
while not mon_sess.should_stop():
image_batch, label_batch = mon_sess.raw_session().run(
[self.images_tr, self.labels_tr])
feed_dict = {
self.inputs_pl: image_batch,
self.labels_pl: label_batch,
self.is_training_pl: True,
self.keep_prob_pl: 0.5,
self.with_dropout_pl: True,
self.batch_size_pl: FLAGS.batch_size
}
step, _, training_loss, training_acc = mon_sess.run(
[global_step, train, loss, accuracy], feed_dict=feed_dict)
print("Iteration {}: Train Loss{:9.6f}, Train Accu {:9.6f}".
format(step, training_loss, training_acc))
# Check against validation set
if step % FLAGS.validate_frequency == 0:
sampled_losses = []
sampled_accuracies = []
hist = np.zeros((self.n_classes, self.n_classes))
for test_step in range(int(20)):
fetches_valid = [loss, accuracy, self.logits]
image_batch_val, label_batch_val = mon_sess.raw_session(
).run([self.images_val, self.labels_val])
feed_dict_valid = {
self.inputs_pl: image_batch_val,
self.labels_pl: label_batch_val,
self.is_training_pl: True,
self.keep_prob_pl: 1.0,
self.with_dropout_pl: False,
self.batch_size_pl: FLAGS.batch_size
}
validate_loss, validate_acc, predictions = mon_sess.raw_session(
).run(fetches_valid, feed_dict_valid)
sampled_losses.append(validate_loss)
sampled_accuracies.append(validate_acc)
hist += get_hist(predictions, label_batch_val)
print_hist_summary(hist)
# Average loss and accuracy over n samples from validation set
avg_loss = np.mean(sampled_losses)
avg_acc = np.mean(sampled_accuracies)
print(
"Iteration {}: Avg Val Loss {:9.6f}, Avg Val Acc {:9.6f}"
.format(step, avg_loss, avg_acc))
coord.request_stop()
coord.join(threads)