def __init__(self, n_channel=3, n_classes=10, image_size=24):
# 输入变量
self.images = tf.placeholder(
dtype=tf.float32,
shape=[None, image_size, image_size, n_channel],
name='images')
self.labels = tf.placeholder(dtype=tf.int64,
shape=[None],
name='labels')
self.keep_prob = tf.placeholder(dtype=tf.float32, name='keep_prob')
self.global_step = tf.Variable(0, dtype=tf.int32, name='global_step')
# 网络结构
conv_layer1 = ConvLayer(input_shape=(None, image_size, image_size,
n_channel),
n_size=3,
n_filter=64,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv1')
pool_layer1 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool1')
conv_layer2 = ConvLayer(input_shape=(None, int(image_size / 2),
int(image_size / 2), 64),
n_size=3,
n_filter=128,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv2')
pool_layer2 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool2')
conv_layer3 = ConvLayer(input_shape=(None, int(image_size / 4),
int(image_size / 4), 128),
n_size=3,
n_filter=256,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv3')
pool_layer3 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool3')
dense_layer1 = DenseLayer(input_shape=(None, int(image_size / 8) *
int(image_size / 8) * 256),
hidden_dim=1024,
activation='relu',
dropout=True,
keep_prob=self.keep_prob,
batch_normal=True,
weight_decay=1e-4,
name='dense1')
dense_layer2 = DenseLayer(input_shape=(None, 1024),
hidden_dim=n_classes,
activation='none',
dropout=False,
keep_prob=None,
batch_normal=False,
weight_decay=1e-4,
name='dense2')
# 数据流
hidden_conv1 = conv_layer1.get_output(input=self.images)
hidden_pool1 = pool_layer1.get_output(input=hidden_conv1)
hidden_conv2 = conv_layer2.get_output(input=hidden_pool1)
hidden_pool2 = pool_layer2.get_output(input=hidden_conv2)
hidden_conv3 = conv_layer3.get_output(input=hidden_pool2)
hidden_pool3 = pool_layer3.get_output(input=hidden_conv3)
input_dense1 = tf.reshape(
hidden_pool3,
[-1, int(image_size / 8) * int(image_size / 8) * 256])
output_dense1 = dense_layer1.get_output(input=input_dense1)
logits = dense_layer2.get_output(input=output_dense1)
# 目标函数
self.objective = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits,
labels=self.labels))
tf.add_to_collection('losses', self.objective)
self.avg_loss = tf.add_n(tf.get_collection('losses'))
# 优化器
lr = tf.cond(
tf.less(self.global_step, 50000), lambda: tf.constant(0.01),
lambda: tf.cond(tf.less(self.global_step, 100000), lambda: tf.
constant(0.001), lambda: tf.constant(0.0001)))
self.optimizer = tf.train.AdamOptimizer(learning_rate=lr).minimize(
self.avg_loss, global_step=self.global_step)
# 观察值
correct_prediction = tf.equal(self.labels, tf.argmax(logits, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_prediction, 'float'))
def __init__(self, n_channel=3, n_classes=10, image_size=24):
# 输入变量
self.images = tf.placeholder(
dtype=tf.float32, shape=[None, image_size, image_size, n_channel], name='images')
self.labels = tf.placeholder(
dtype=tf.int64, shape=[None], name='labels')
self.keep_prob = tf.placeholder(
dtype=tf.float32, name='keep_prob')
self.global_step = tf.Variable(
0, dtype=tf.int32, name='global_step')
# 网络结构
conv_layer1 = ConvLayer(
input_shape=(None, image_size, image_size, n_channel), n_size=3, n_filter=64,
stride=1, activation='relu', batch_normal=True, weight_decay=1e-4,
name='conv1')
pool_layer1 = PoolLayer(
n_size=2, stride=2, mode='max', resp_normal=True, name='pool1')
conv_layer2 = ConvLayer(
input_shape=(None, int(image_size/2), int(image_size/2), 64), n_size=3, n_filter=128,
stride=1, activation='relu', batch_normal=True, weight_decay=1e-4,
name='conv2')
pool_layer2 = PoolLayer(
n_size=2, stride=2, mode='max', resp_normal=True, name='pool2')
conv_layer3 = ConvLayer(
input_shape=(None, int(image_size/4), int(image_size/4), 128), n_size=3, n_filter=256,
stride=1, activation='relu', batch_normal=True, weight_decay=1e-4,
name='conv3')
pool_layer3 = PoolLayer(
n_size=2, stride=2, mode='max', resp_normal=True, name='pool3')
dense_layer1 = DenseLayer(
input_shape=(None, int(image_size/8) * int(image_size/8) * 256), hidden_dim=1024,
activation='relu', dropout=True, keep_prob=self.keep_prob,
batch_normal=True, weight_decay=1e-4, name='dense1')
dense_layer2 = DenseLayer(
input_shape=(None, 1024), hidden_dim=n_classes,
activation='none', dropout=False, keep_prob=None,
batch_normal=False, weight_decay=1e-4, name='dense2')
# 数据流
hidden_conv1 = conv_layer1.get_output(input=self.images)
hidden_pool1 = pool_layer1.get_output(input=hidden_conv1)
hidden_conv2 = conv_layer2.get_output(input=hidden_pool1)
hidden_pool2 = pool_layer2.get_output(input=hidden_conv2)
hidden_conv3 = conv_layer3.get_output(input=hidden_pool2)
hidden_pool3 = pool_layer3.get_output(input=hidden_conv3)
input_dense1 = tf.reshape(hidden_pool3, [-1, int(image_size/8) * int(image_size/8) * 256])
output_dense1 = dense_layer1.get_output(input=input_dense1)
logits = dense_layer2.get_output(input=output_dense1)
# 目标函数
self.objective = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(
logits=logits, labels=self.labels))
tf.add_to_collection('losses', self.objective)
self.avg_loss = tf.add_n(tf.get_collection('losses'))
# 优化器
lr = tf.cond(tf.less(self.global_step, 50000),
lambda: tf.constant(0.01),
lambda: tf.cond(tf.less(self.global_step, 100000),
lambda: tf.constant(0.001),
lambda: tf.constant(0.0001)))
self.optimizer = tf.train.AdamOptimizer(learning_rate=lr).minimize(
self.avg_loss, global_step=self.global_step)
# 观察值
correct_prediction = tf.equal(self.labels, tf.argmax(logits, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_prediction, 'float'))
def net_2(hidden_pool1, keep_prob, image_size, n_classes):
with tf.variable_scope('net_2'):
conv_layer2_2 = ConvLayer(input_shape=(None, int(image_size / 2),
int(image_size / 2), 64),
n_size=3,
n_filter=128,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv2')
pool_layer2_2 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool2')
conv_layer3_2 = ConvLayer(input_shape=(None, int(image_size / 4),
int(image_size / 4), 128),
n_size=3,
n_filter=256,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv3')
pool_layer3_2 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool3')
dense_layer1_2 = DenseLayer(input_shape=(None, int(image_size / 8) *
int(image_size / 8) * 256),
hidden_dim=1024,
activation='relu',
dropout=True,
keep_prob=keep_prob,
batch_normal=True,
weight_decay=1e-4,
name='dense1')
dense_layer2_2 = DenseLayer(input_shape=(None, 1024),
hidden_dim=n_classes,
activation='none',
dropout=False,
keep_prob=None,
batch_normal=False,
weight_decay=1e-4,
name='dense2')
# net 1
hidden_conv2_2 = conv_layer2_2.get_output(input=hidden_pool1)
hidden_pool2_2 = pool_layer2_2.get_output(input=hidden_conv2_2)
hidden_conv3_2 = conv_layer3_2.get_output(input=hidden_pool2_2)
hidden_pool3_2 = pool_layer3_2.get_output(input=hidden_conv3_2)
input_dense1_2 = tf.reshape(
hidden_pool3_2,
[-1, int(image_size / 8) * int(image_size / 8) * 256])
output_dense1_2 = dense_layer1_2.get_output(input=input_dense1_2)
logits_2 = dense_layer2_2.get_output(input=output_dense1_2)
return logits_2
def __init__(self, n_channel=3, n_classes=10, image_size=24):
# 输入变量
self.images = tf.placeholder(
dtype=tf.float32,
shape=[None, image_size, image_size, n_channel],
name='images')
self.labels = tf.placeholder(dtype=tf.int64,
shape=[None],
name='labels')
self.keep_prob = tf.placeholder(dtype=tf.float32, name='keep_prob')
self.global_step = tf.Variable(0, dtype=tf.int32, name='global_step')
# 网络结构
conv_layer1 = ConvLayer(input_shape=(None, image_size, image_size,
n_channel),
n_size=3,
n_filter=64,
stride=1,
activation='relu',
batch_normal=True,
weight_decay=1e-4,
name='conv1')
pool_layer1 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=True,
name='pool1')
# 数据流
hidden_conv1 = conv_layer1.get_output(input=self.images)
hidden_pool1 = pool_layer1.get_output(input=hidden_conv1)
#net_1
self.logits_1 = net_1(hidden_pool1, self.keep_prob, image_size,
n_classes)
#net 2
self.logits_2 = net_2(hidden_pool1, self.keep_prob, image_size,
n_classes)
#net 3
self.logits_3 = net_3(hidden_pool1, self.keep_prob, image_size,
n_classes)
# 目标函数
self.objective_1 = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(
logits=self.logits_1, labels=self.labels))
self.objective_2 = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(
logits=self.logits_2, labels=self.labels))
self.objective_3 = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(
logits=self.logits_3, labels=self.labels))
self.objective = self.objective_1 + self.objective_2 + self.objective_3
tf.add_to_collection('losses', self.objective)
self.avg_loss = tf.add_n(tf.get_collection('losses'))
# 优化器
lr = tf.cond(
tf.less(self.global_step, 50000), lambda: tf.constant(0.01),
lambda: tf.cond(tf.less(self.global_step, 100000), lambda: tf.
constant(0.001), lambda: tf.constant(0.0001)))
self.optimizer = tf.train.AdamOptimizer(learning_rate=lr).minimize(
self.avg_loss, global_step=self.global_step)
# 观察值
correct_prediction_1 = tf.equal(self.labels,
tf.argmax(self.logits_1, 1))
self.accuracy_1 = tf.reduce_mean(tf.cast(correct_prediction_1,
'float'))
correct_prediction_2 = tf.equal(self.labels,
tf.argmax(self.logits_2, 1))
self.accuracy_2 = tf.reduce_mean(tf.cast(correct_prediction_2,
'float'))
correct_prediction_3 = tf.equal(self.labels,
tf.argmax(self.logits_3, 1))
self.accuracy_3 = tf.reduce_mean(tf.cast(correct_prediction_3,
'float'))
def inference(self, images):
# 网络结构
conv_layer1 = ConvLayer(input_shape=(self.batch_size, self.image_size,
self.image_size, self.n_channel),
n_size=3,
n_filter=16,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv1')
pool_layer1 = PoolLayer(input_shape=(self.batch_size, self.image_size,
self.image_size, 16),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool1')
conv_layer2 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 2),
int(self.image_size / 2), 16),
n_size=3,
n_filter=32,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv2')
pool_layer2 = PoolLayer(input_shape=(self.batch_size,
int(self.image_size / 2),
int(self.image_size / 2), 32),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool2')
conv_layer3 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 4),
int(self.image_size / 4), 32),
n_size=3,
n_filter=64,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv3')
pool_layer3 = PoolLayer(input_shape=(self.batch_size,
int(self.image_size / 4),
int(self.image_size / 4), 64),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool3')
conv_layer4 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 8),
int(self.image_size / 8), 64),
n_size=3,
n_filter=128,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv4')
pool_layer4 = PoolLayer(input_shape=(self.batch_size,
int(self.image_size / 8),
int(self.image_size / 8), 128),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool4')
conv_layer5 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 16),
int(self.image_size / 16), 128),
n_size=3,
n_filter=256,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv5')
pool_layer5 = PoolLayer(input_shape=(self.batch_size,
int(self.image_size / 16),
int(self.image_size / 16), 256),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool5')
conv_layer6 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 32),
int(self.image_size / 32), 256),
n_size=3,
n_filter=512,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv6')
pool_layer6 = PoolLayer(input_shape=(self.batch_size,
int(self.image_size / 32),
int(self.image_size / 32), 512),
n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool6')
conv_layer7 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 64),
int(self.image_size / 64), 512),
n_size=3,
n_filter=1024,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv7')
conv_layer8 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 64),
int(self.image_size / 64), 1024),
n_size=3,
n_filter=1024,
stride=1,
activation='leaky_relu',
batch_normal=True,
weight_decay=5e-4,
name='conv8')
conv_layer9 = ConvLayer(input_shape=(self.batch_size,
int(self.image_size / 64),
int(self.image_size / 64), 1024),
n_size=1,
n_filter=self.n_boxes * 5,
stride=1,
activation='none',
batch_normal=False,
weight_decay=5e-4,
name='conv9')
# 数据流
print('\n%-10s\t%-20s\t%-20s\t%s' %
('Name', 'Filter', 'Input', 'Output'))
hidden_conv1 = conv_layer1.get_output(input=images)
hidden_pool1 = pool_layer1.get_output(input=hidden_conv1)
hidden_conv2 = conv_layer2.get_output(input=hidden_pool1)
hidden_pool2 = pool_layer2.get_output(input=hidden_conv2)
hidden_conv3 = conv_layer3.get_output(input=hidden_pool2)
hidden_pool3 = pool_layer3.get_output(input=hidden_conv3)
hidden_conv4 = conv_layer4.get_output(input=hidden_pool3)
hidden_pool4 = pool_layer4.get_output(input=hidden_conv4)
hidden_conv5 = conv_layer5.get_output(input=hidden_pool4)
hidden_pool5 = pool_layer5.get_output(input=hidden_conv5)
hidden_conv6 = conv_layer6.get_output(input=hidden_pool5)
hidden_pool6 = pool_layer6.get_output(input=hidden_conv6)
hidden_conv7 = conv_layer7.get_output(input=hidden_pool6)
hidden_conv8 = conv_layer8.get_output(input=hidden_conv7)
hidden_conv9 = conv_layer9.get_output(input=hidden_conv8)
logits = hidden_conv9
print()
sys.stdout.flush()
# 网络输出
return logits
class ConvNet():
def __init__(self, n_channel, n_classes, image_height, image_width,
sentence_length, vocab_size, embedding_dim, LSTM_hidden_size):
# 输入变量
self.images1 = tf.placeholder(
dtype=tf.float32,
shape=[None, image_height, image_width, n_channel],
name='images')
self.images2 = tf.placeholder(
dtype=tf.float32,
shape=[None, image_height, image_width, n_channel],
name='images')
self.labels = tf.placeholder(dtype=tf.int64,
shape=[None],
name='labels')
'''
self.instructions = tf.placeholder(
dtype=tf.int64, shape=[None, sentence_length], name='instructions')
'''
self.keep_prob = tf.placeholder(dtype=tf.float32, name='keep_prob')
self.global_step = tf.Variable(0, dtype=tf.int32, name='global_step')
# CNN网络结构
self.conv_layer1 = ConvLayer(input_shape=(None, image_height,
image_width, n_channel),
n_size=3,
n_filter=64,
stride=1,
activation='relu',
batch_normal=False,
weight_decay=1e-4,
name='conv1')
self.pool_layer1 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool1')
self.conv_layer2 = ConvLayer(input_shape=(None, int(image_height / 2),
int(image_width / 2), 64),
n_size=3,
n_filter=128,
stride=1,
activation='relu',
batch_normal=False,
weight_decay=1e-4,
name='conv2')
self.pool_layer2 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool2')
self.conv_layer3 = ConvLayer(input_shape=(None, int(image_height / 4),
int(image_width / 4), 128),
n_size=3,
n_filter=256,
stride=1,
activation='relu',
batch_normal=False,
weight_decay=1e-4,
name='conv3')
self.pool_layer3 = PoolLayer(n_size=2,
stride=2,
mode='max',
resp_normal=False,
name='pool3')
self.dense_layer1 = DenseLayer(
input_shape=(None,
int(image_height / 8) * int(image_width / 8) * 256),
hidden_dim=1024,
activation='relu',
dropout=True,
keep_prob=self.keep_prob,
batch_normal=False,
weight_decay=1e-4,
name='dense1')
self.dense_layer2 = DenseLayer(input_shape=(None, 1024),
hidden_dim=512,
activation='none',
dropout=False,
keep_prob=None,
batch_normal=False,
weight_decay=1e-4,
name='dense2')
# CNN数据流
cnn_output1 = self.get_output(self.images1, image_height, image_width)
cnn_output2 = self.get_output(self.images2, image_height, image_width)
'''
#LSTM
embedding = tf.get_variable("embedding", [vocab_size, embedding_dim]) # [19, 128]
input_embeddings = tf.nn.embedding_lookup(embedding, self.instructions) # [batch_size, 5, 128]
instruc_cell = tf.nn.rnn_cell.BasicLSTMCell(LSTM_hidden_size) # LSTM_hidden_size = 128
lstm_outputs, lstm_state = tf.nn.dynamic_rnn(instruc_cell, input_embeddings, dtype=tf.float32) #[batch_size, 5, 128]
lstm_output = lstm_outputs[:, -1, :] #[batch_size, 128]
'''
#predict
fully_connected1 = DenseLayer(input_shape=(None, 512),
hidden_dim=256,
activation='relu',
dropout=False,
keep_prob=self.keep_prob,
batch_normal=False,
weight_decay=1e-4,
name='fc1')
fully_connected2 = DenseLayer(input_shape=(None, 256),
hidden_dim=n_classes,
activation='relu',
dropout=False,
keep_prob=self.keep_prob,
batch_normal=False,
weight_decay=1e-4,
name='fc2')
multi_output = tf.multiply(cnn_output1,
cnn_output2,
name='element_wise_multiplication')
output_fc1 = fully_connected1.get_output(input=multi_output)
logits = fully_connected2.get_output(input=output_fc1)
logit = tf.argmax(logits, 1, name='predicted_class')
# 目标函数
self.objective = tf.reduce_sum(
tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits,
labels=self.labels))
tf.add_to_collection('losses', self.objective)
self.avg_loss = tf.add_n(tf.get_collection('losses'))
# 优化器
lr = tf.cond(
tf.less(self.global_step, 5000), lambda: tf.constant(0.01),
lambda: tf.cond(tf.less(self.global_step, 10000), lambda: tf.
constant(0.001), lambda: tf.constant(0.0001)))
self.optimizer = tf.train.AdamOptimizer(learning_rate=lr).minimize(
self.avg_loss, global_step=self.global_step)
# 观察值
correct_prediction = tf.equal(self.labels, logit)
self.accuracy = tf.reduce_mean(tf.cast(correct_prediction, 'float'))
def get_output(self, input, image_height, image_width):
hidden_conv1 = self.conv_layer1.get_output(input=input)
hidden_pool1 = self.pool_layer1.get_output(input=hidden_conv1)
hidden_conv2 = self.conv_layer2.get_output(input=hidden_pool1)
hidden_pool2 = self.pool_layer2.get_output(input=hidden_conv2)
hidden_conv3 = self.conv_layer3.get_output(input=hidden_pool2)
hidden_pool3 = self.pool_layer3.get_output(input=hidden_conv3)
input_dense1 = tf.reshape(
hidden_pool3,
[-1, int(image_height / 8) * int(image_width / 8) * 256])
output_dense1 = self.dense_layer1.get_output(input=input_dense1)
cnn_output = self.dense_layer2.get_output(input=output_dense1)
#logit = tf.argmax(logits, 1, name='predicted_class')
return cnn_output
def train(self, dataloader, backup_path, n_epoch=5, batch_size=128):
# 构建会话
gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.45)
self.sess = tf.Session(config=tf.ConfigProto(gpu_options=gpu_options))
# 模型保存器
self.saver = tf.train.Saver(var_list=tf.global_variables(),
write_version=tf.train.SaverDef.V2,
max_to_keep=10)
# 模型初始化
self.sess.run(tf.global_variables_initializer())
# 模型训练
for epoch in range(0, n_epoch + 1):
train_images1 = dataloader.train_images1
train_images2 = dataloader.train_images2
#train_instructions = dataloader.train_instructions
train_labels = dataloader.train_labels
valid_images1 = dataloader.valid_images1
valid_images2 = dataloader.valid_images2
#valid_instructions = dataloader.valid_instructions
valid_labels = dataloader.valid_labels
# 开始本轮的训练，并计算目标函数值
train_accuracy, train_loss = 0.0, 0.0
for i in range(0, dataloader.n_train, batch_size):
batch_images1 = train_images1[i:i + batch_size]
batch_images2 = train_images2[i:i + batch_size]
#batch_instructions = train_instructions[i: i+batch_size]
batch_labels = train_labels[i:i + batch_size]
[_, avg_accuracy, avg_loss, iteration] = self.sess.run(
fetches=[
self.optimizer, self.accuracy, self.avg_loss,
self.global_step
],
feed_dict={
self.images1: batch_images1,
self.images2: batch_images2,
#self.instructions: batch_instructions,
self.labels: batch_labels,
self.keep_prob: 0.5
})
train_accuracy += avg_accuracy * batch_images1.shape[0]
train_loss += avg_loss * batch_images1.shape[0]
train_accuracy = 1.0 * train_accuracy / dataloader.n_train
train_loss = 1.0 * train_loss / dataloader.n_train
# 在训练之后，获得本轮的验证集损失值和准确率
valid_accuracy, valid_loss = 0.0, 0.0
for i in range(0, dataloader.n_valid, batch_size):
batch_images1 = valid_images1[i:i + batch_size]
batch_images2 = valid_images2[i:i + batch_size]
#batch_instructions = valid_instructions[i: i+batch_size]
batch_labels = valid_labels[i:i + batch_size]
[avg_accuracy, avg_loss] = self.sess.run(
fetches=[self.accuracy, self.avg_loss],
feed_dict={
self.images1: batch_images1,
self.images2: batch_images2,
#self.instructions: batch_instructions,
self.labels: batch_labels,
self.keep_prob: 1.0
})
valid_accuracy += avg_accuracy * batch_images1.shape[0]
valid_loss += avg_loss * batch_images1.shape[0]
valid_accuracy = 1.0 * valid_accuracy / dataloader.n_valid
valid_loss = 1.0 * valid_loss / dataloader.n_valid
print(
'epoch{%d}, iter[%d], train precision: %.6f, train loss: %.6f, '
'valid precision: %.6f, valid loss: %.6f' %
(epoch, iteration, train_accuracy, train_loss, valid_accuracy,
valid_loss))
sys.stdout.flush()
# 保存模型
if not os.path.exists(backup_path):
os.makedirs(backup_path)
saver_path = self.saver.save(
self.sess, os.path.join(backup_path,
'model_%d.ckpt' % (epoch)))
self.sess.close()
def test(self, dataloader, backup_path, epoch, batch_size=128):
gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.25)
self.sess = tf.Session(config=tf.ConfigProto(gpu_options=gpu_options))
# 读取模型
self.saver = tf.train.Saver(write_version=tf.train.SaverDef.V2)
model_path = os.path.join(backup_path, 'model_%d.ckpt' % (epoch))
assert (os.path.exists(model_path + '.index'))
self.saver.restore(self.sess, model_path)
print('read model from %s' % (model_path))
# 在测试集上计算准确率
accuracy_list = []
test_images = dataloader.data_augmentation(dataloader.test_images,
flip=False,
crop=True,
crop_shape=(24, 24, 3),
whiten=True,
noise=False)
test_labels = dataloader.test_labels
for i in range(0, dataloader.n_test, batch_size):
batch_images = test_images[i:i + batch_size]
batch_labels = test_labels[i:i + batch_size]
[avg_accuracy] = self.sess.run(fetches=[self.accuracy],
feed_dict={
self.images: batch_images,
self.labels: batch_labels,
self.keep_prob: 1.0
})
accuracy_list.append(avg_accuracy)
print('test precision: %.4f' % (numpy.mean(accuracy_list)))
self.sess.close()
def debug(self):
sess = tf.Session()
sess.run(tf.global_variables_initializer())
[temp] = sess.run(fetches=[self.observe],
feed_dict={
self.images:
numpy.random.random(size=[128, 24, 24, 3]),
self.labels:
numpy.random.randint(low=0, high=9, size=[
128,
]),
self.keep_prob:
1.0
})
print(temp)
def observe_salience(self,
batch_size=128,
image_h=32,
image_w=32,
n_channel=3,
num_test=10,
epoch=1):
if not os.path.exists('results/epoch%d/' % (epoch)):
os.makedirs('results/epoch%d/' % (epoch))
saver = tf.train.Saver(write_version=tf.train.SaverDef.V2)
sess = tf.Session()
# 读取模型
model_path = 'backup/cifar10/model_%d.ckpt' % (epoch)
assert (os.path.exists(model_path + '.index'))
saver.restore(sess, model_path)
print('read model from %s' % (model_path))
# 获取图像并计算梯度
for batch in range(num_test):
batch_image, batch_label = cifar10.test.next_batch(batch_size)
image = numpy.array(
batch_image.reshape([image_h, image_w, n_channel]) * 255,
dtype='uint8')
result = sess.run(
[
self.labels_prob, self.labels_max_prob, self.labels_pred,
self.gradient
],
feed_dict={
self.images: batch_image,
self.labels: batch_label,
self.keep_prob: 0.5
})
print(result[0:3], result[3][0].shape)
gradient = sess.run(self.gradient,
feed_dict={
self.images: batch_image,
self.keep_prob: 0.5
})
gradient = gradient[0].reshape([image_h, image_w, n_channel])
gradient = numpy.max(gradient, axis=2)
gradient = numpy.array((gradient - gradient.min()) * 255 /
(gradient.max() - gradient.min()),
dtype='uint8')
print(gradient.shape)
# 使用pyplot画图
plt.subplot(121)
plt.imshow(image)
plt.subplot(122)
plt.imshow(gradient, cmap=plt.cm.gray)
plt.savefig('results/epoch%d/result_%d.png' % (epoch, batch))
def observe_hidden_distribution(self,
batch_size=128,
image_h=32,
image_w=32,
n_channel=3,
num_test=10,
epoch=1):
if not os.path.exists('results/epoch%d/' % (epoch)):
os.makedirs('results/epoch%d/' % (epoch))
saver = tf.train.Saver(write_version=tf.train.SaverDef.V2)
sess = tf.Session()
# 读取模型
model_path = 'backup/cifar10/model_%d.ckpt' % (epoch)
if os.path.exists(model_path + '.index'):
saver.restore(sess, model_path)
print('read model from %s' % (model_path))
else:
sess.run(tf.global_variables_initializer())
# 获取图像并计算梯度
for batch in range(num_test):
batch_image, batch_label = cifar10.test.next_batch(batch_size)
result = sess.run(
[
self.nobn_conv1, self.bn_conv1, self.nobn_conv2,
self.bn_conv2, self.nobn_conv3, self.bn_conv3,
self.nobn_fc1, self.nobn_fc1, self.nobn_softmax,
self.bn_softmax
],
feed_dict={
self.images: batch_image,
self.labels: batch_label,
self.keep_prob: 0.5
})
distribution1 = result[0][:, 0].flatten()
distribution2 = result[1][:, 0].flatten()
distribution3 = result[2][:, 0].flatten()
distribution4 = result[3][:, 0].flatten()
distribution5 = result[4][:, 0].flatten()
distribution6 = result[5][:, 0].flatten()
distribution7 = result[6][:, 0].flatten()
distribution8 = result[7][:, 0].flatten()
plt.subplot(241)
plt.hist(distribution1, bins=50, color='#1E90FF')
plt.title('convolutional layer 1')
plt.subplot(242)
plt.hist(distribution3, bins=50, color='#1C86EE')
plt.title('convolutional layer 2')
plt.subplot(243)
plt.hist(distribution5, bins=50, color='#1874CD')
plt.title('convolutional layer 3')
plt.subplot(244)
plt.hist(distribution7, bins=50, color='#5CACEE')
plt.title('full connection layer')
plt.subplot(245)
plt.hist(distribution2, bins=50, color='#00CED1')
plt.title('batch normalized')
plt.subplot(246)
plt.hist(distribution4, bins=50, color='#48D1CC')
plt.title('batch normalized')
plt.subplot(247)
plt.hist(distribution6, bins=50, color='#40E0D0')
plt.title('batch normalized')
plt.subplot(248)
plt.hist(distribution8, bins=50, color='#00FFFF')
plt.title('batch normalized')
plt.show()