def evaluate():
data_generator = dataGen(test_data_path + "/0", test_data_path + "/1", batch_size)
x = tf.placeholder(tf.float32, [None, height, width, channel], name="inputs")
y_true = tf.placeholder(tf.float32, [None], name="labels")
is_training = tf.placeholder(tf.bool, name="is_train")
vgg = VGG()
out = vgg.model(x, is_training)
prob = tf.nn.softmax(out)
y_pred = tf.argmax(prob, axis=1)
auc_value, auc_op = tf.metrics.auc(y_true, y_pred)
saver = tf.train.Saver()
with tf.Session() as sess:
saver.restore(sess, model_saved_path)
inputs, labels = data_generator.__next__()
predict = sess.run(y_pred, {x: inputs, is_training: is_train})
#predict, _, val = sess.run([y_pred, auc_op, auc_value], {x: inputs, y_true: labels, is_training: is_train})
sess.run(tf.local_variables_initializer())
sess.run(auc_op, {x: inputs, y_true: labels, is_training: is_train})
val = sess.run(auc_value)
print(predict)
print(labels)
print("AUC : ", val)
def train():
pf = os.listdir(positive_path)
nf = os.listdir(negative_path)
num_examples = int((len(pf) + len(nf)) * 0.7)
# data_generator = dataGen(positive_path, negative_path, batch_size)
val_data_generator = valGen(positive_path, negative_path, batch_size)
x = tf.placeholder(tf.float32, [None, height, width, channels],
name="inputs")
y_true = tf.placeholder(tf.float32, [None], name="labels")
is_training = tf.placeholder(tf.bool, name="is_train")
# forward
vgg = VGG()
logit = vgg.model(x, is_training)
prob = tf.nn.sigmoid(logit, name="prob")
# compute acc
y_pred = tf.argmax(prob, axis=1)
correct_prediction = tf.equal(tf.cast(y_pred, tf.float32), y_true)
accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))
tf.summary.scalar('acc', accuracy)
# loss function
# cross_entropy = tf.nn.sparse_softmax_cross_entropy_with_logits(labels=y_true, logits=logit)
logit = tf.squeeze(logit, axis=1)
# cross_entropy = tf.nn.sigmoid_cross_entropy_with_logits(labels=y_true, logits=logit)
cross_entropy = focal_loss(y_true, logit)
cross_entropy_mean = tf.reduce_mean(cross_entropy)
# print([v for v in tf.trainable_variables()])
l2_loss = regular_rate * tf.add_n([
tf.nn.l2_loss(tf.cast(v, tf.float32))
for v in tf.trainable_variables()
])
loss = cross_entropy_mean + l2_loss
tf.summary.scalar('loss', loss)
# global step
global_step = tf.Variable(0, trainable=False)
# exponential moving average
variable_averages = tf.train.ExponentialMovingAverage(
moving_average_decay, global_step)
# update weight using moving average
variables_averages_op = variable_averages.apply(tf.trainable_variables())
# learning rate exponential decay
learning_rate = tf.train.exponential_decay(lr,
global_step,
num_examples // batch_size,
0.96,
staircase=True)
tf.summary.scalar('learning_rate', learning_rate)
# Passing global_step to minimize() will increment it at each step.
train_step = tf.train.GradientDescentOptimizer(learning_rate).minimize(
loss, global_step=global_step)
# merge train step and variables averages op
merged = tf.summary.merge_all()
with tf.control_dependencies([train_step, variables_averages_op]):
train_op = tf.no_op(name='train')
# model save
sav_iter = [i for i in range(epochs * num_examples // batch_size)]
sav_acc = []
saver = tf.train.Saver()
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
summary_writer_t = tf.summary.FileWriter(log_saved_path + '/train',
sess.graph)
summary_writer_v = tf.summary.FileWriter(log_saved_path + '/valid',
sess.graph)
for epoch in range(epochs):
iteration = 0
data_generator = dataGen(positive_path, negative_path, batch_size)
for inputs, labels in data_generator:
# print(inputs.shape)
# print(labels.shape)
probability, loss_value, acc_value, summary, step, clr, _ = sess.run(
[
prob, loss, accuracy, merged, global_step,
learning_rate, train_op
], {
x: inputs,
y_true: labels,
is_training: is_train
})
print(
"[epoch : %2d / iter : %5d] loss: %.5f acc: %.5f lr: %.5f"
% (epoch, iteration, loss_value, acc_value, clr))
sav_acc.append(acc_value)
summary_writer_t.add_summary(summary, step)
iteration += 1
# break
# validation
val_inputs, val_labels = val_data_generator.__next__()
summary_v = sess.run(merged, {
x: val_inputs,
y_true: val_labels,
is_training: is_train
})
summary_writer_v.add_summary(summary_v, epoch)
print("Saving model.....")
saver.save(sess, model_saved_path + "/epoch_%d.ckpt" % epoch)
summary_writer_t.close()
summary_writer_v.close()
def train():
pf = os.listdir(positive_path)
nf = os.listdir(negative_path)
num_examples = int((len(pf) + len(nf)) * 0.7)
# data_generator = dataGen(positive_path, negative_path, batch_size)
x = tf.placeholder(tf.float32, [None, height, width, channels],
name="inputs")
y_true = tf.placeholder(tf.float32, [None], name="labels")
is_training = tf.placeholder(tf.bool, name="is_train")
# forward
vgg = VGG()
logit = vgg.model(x, is_training)
prob = tf.nn.sigmoid(logit, name="prob")
print("prob shape : ", prob.get_shape().as_list())
print("y_true shape : ", y_true.get_shape().as_list())
# compute acc
# y_pred = tf.where(prob > 0.5, True, False)
y_pred = tf.cast(tf.greater(prob, 0.5), tf.float32)
correct_prediction = tf.equal(y_pred, y_true)
accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))
tf.summary.scalar('acc', accuracy)
# loss function
# labels = tf.expand_dims(y_true, axis=1)
# cross_entropy = tf.nn.weighted_cross_entropy_with_logits(labels, logit, 9)
# logit = tf.squeeze(logit, axis=1)
# cross_entropy = tf.nn.sigmoid_cross_entropy_with_logits(labels=y_true, logits=logit)
prob = tf.squeeze(prob, axis=1)
print("prob shape : ", prob.get_shape().as_list())
cross_entropy = focal_loss(y_true, prob)
cross_entropy_mean = tf.reduce_mean(cross_entropy)
# print([v for v in tf.trainable_variables()])
l2_loss = regular_rate * tf.add_n([
tf.nn.l2_loss(tf.cast(v, tf.float32))
for v in tf.trainable_variables()
])
loss = cross_entropy_mean + l2_loss
tf.summary.scalar('loss', loss)
# global step
global_step = tf.Variable(0, trainable=False)
# exponential moving average
variable_averages = tf.train.ExponentialMovingAverage(
moving_average_decay, global_step)
# update weight using moving average
variables_averages_op = variable_averages.apply(tf.trainable_variables())
# learning rate exponential decay
learning_rate = tf.train.exponential_decay(lr,
global_step,
num_examples // batch_size,
0.96,
staircase=True)
tf.summary.scalar('learning_rate', learning_rate)
# Passing global_step to minimize() will increment it at each step.
# train_step = tf.train.GradientDescentOptimizer(learning_rate).minimize(loss, global_step=global_step)
train_step = tf.train.MomentumOptimizer(
learning_rate, momentum=0.9).minimize(loss, global_step=global_step)
# train_step = tf.train.AdamOptimizer(lr).minimize(loss, global_step=global_step)
merged = tf.summary.merge_all()
# merge train step and variables averages op
with tf.control_dependencies([train_step, variables_averages_op]):
train_op = tf.no_op(name='train')
# model save
saver = tf.train.Saver(max_to_keep=20)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
summary_writer_t = tf.summary.FileWriter(log_saved_path, sess.graph)
for epoch in range(epochs):
iteration = 0
inpu, outp, idx = dataShuffle(positive_path, negative_path)
data_generator = dataGen(inpu, outp, idx, batch_size)
val_generator = valGen(inpu, outp, idx, batch_size)
for inputs, labels in data_generator:
probability, loss_value, acc_value, summary, step, clr, _ = sess.run(
[
prob, loss, accuracy, merged, global_step,
learning_rate, train_op
], {
x: inputs,
y_true: labels,
is_training: is_train
})
print(
"[epoch : %2d / iter : %5d] loss: %.5f acc: %.5f lr: %.5f"
% (epoch, iteration, loss_value, acc_value, clr))
summary_writer_t.add_summary(summary, step)
iteration += 1
# validation
average_acc = 0.0
vcnt = 0
for vi, vl in val_generator:
# val_inputs, val_labels = val_data_generator.__next__()
va = sess.run(accuracy, {
x: vi,
y_true: vl,
is_training: is_train
})
average_acc = average_acc + va
vcnt += 1
print("validation acc : ", average_acc / vcnt)
print("Saving model.....")
if (epoch + 1) % 10 == 0:
saver.save(sess, model_saved_path + "/epoch_%d.ckpt" % epoch)
summary_writer_t.close()
def train():
pf = os.listdir(positive_path)
nf = os.listdir(negative_path)
num_examples = int((len(pf) + len(nf)) * 0.7)
# data_generator = dataGen(positive_path, negative_path, batch_size)
x = tf.placeholder(tf.float32, [None, height, width, channels], name="inputs")
y_true = tf.placeholder(tf.float32, [None], name="labels")
is_training = tf.placeholder(tf.bool, name="is_train")
# forward
vgg = VGG()
logit = vgg.model(x, is_training)
prob = tf.nn.sigmoid(logit, name="prob")
# auc
y_hat = tf.cast(tf.greater(prob, 0.5), tf.float32)
y_hat = tf.squeeze(y_hat, axis=1)
auc_value, auc_op = tf.metrics.auc(y_true, y_hat)
# tf.summary.scalar('auc', auc_value)
# loss function
logit = tf.squeeze(logit, axis=1)
cross_entropy = tf.nn.sigmoid_cross_entropy_with_logits(labels=y_true, logits=logit)
# cross_entropy = focal_loss(labels=y_true, logits=logit)
cross_entropy_mean = tf.reduce_mean(cross_entropy)
# print([v for v in tf.trainable_variables()])
l2_loss = regular_rate * tf.add_n([tf.nn.l2_loss(tf.cast(v, tf.float32)) for v in tf.trainable_variables()])
loss = cross_entropy_mean + l2_loss
tf.summary.scalar('loss', loss)
# global step
global_step = tf.Variable(0, trainable=False)
# exponential moving average
variable_averages = tf.train.ExponentialMovingAverage(moving_average_decay, global_step)
# update weight using moving average
variables_averages_op = variable_averages.apply(tf.trainable_variables())
# learning rate exponential decay
learning_rate = tf.train.exponential_decay(lr,
global_step,
num_examples // batch_size
, 1, staircase=True)
tf.summary.scalar('learning_rate', learning_rate)
# Passing global_step to minimize() will increment it at each step.
# train_step = tf.train.GradientDescentOptimizer(learning_rate).minimize(loss, global_step=global_step)
train_step = tf.train.MomentumOptimizer(learning_rate, momentum=0.9).minimize(loss, global_step=global_step)
merged = tf.summary.merge_all()
# merge train step and variables averages op
with tf.control_dependencies([train_step, variables_averages_op]):
train_op = tf.no_op(name='train')
# model save
sav_iter = [i for i in range(epochs * num_examples // batch_size)]
sav_acc = []
saver = tf.train.Saver(max_to_keep=20)
with tf.Session() as sess:
# 断点继续训练
# saver.restore(sess, '/home/sdc/xujiping_sde/saved_model_cbr' + '/epoch_s1_29.ckpt')
# print("loading saved model done")
sess.run(tf.global_variables_initializer())
summary_writer_t = tf.summary.FileWriter(log_saved_path, sess.graph)
summary_writer_v = tf.summary.FileWriter(log_saved_path, sess.graph)
for epoch in range(epochs):
iteration = 0
inpu, outp, idx = dataShuffle(positive_path, negative_path)
data_generator = dataGen(inpu, outp, idx, batch_size)
val_generator = valGen(inpu, outp, idx, batch_size)
for inputs, labels in data_generator:
# print(inputs.shape)
# print(labels.shape)
probability, loss_value, summary, step, clr, _ = sess.run(
[prob, loss, merged, global_step, learning_rate, train_op],
{x: inputs, y_true: labels, is_training: is_train}
)
print("[epoch : %2d / iter : %5d] loss: %.5f, lr: %.5f" % (epoch, iteration, loss_value, clr))
summary_writer_t.add_summary(summary, step)
iteration += 1
# break
# validation
val_true = []
val_pred = []
for vi, vl in val_generator:
# val_inputs, val_labels = val_data_generator.__next__()
pred = sess.run(y_hat, {x: vi, y_true: vl, is_training: is_train})
val_true += list(vl)
val_pred += list(pred)
summary = sess.run(merged, {x: vi, y_true: vl, is_training: is_train})
summary_writer_v.add_summary(summary, step)
print("Auc value : ", roc_auc_score(np.array(val_true), np.array(val_pred)))
print("Saving model.....")
if (epoch + 1) % 10 == 0 :
saver.save(sess, model_saved_path + "/epoch_s1_%d.ckpt" % epoch)
summary_writer_t.close()
summary_writer_v.close()