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model.py
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model.py
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from layer import *
class Model:
def __init__(self, x, mask, local_x, global_completion, local_completion, is_training, batch_size):
self.batch_size = batch_size
self.imitation = self.generator(x * (1 - mask), is_training)
self.completion = self.imitation * mask + x * (1 - mask)
self.real = self.discriminator(x, local_x, reuse=False)
self.fake = self.discriminator(global_completion, local_completion, reuse=True)
self.g_loss = self.calc_g_loss(x, self.completion)
self.d_loss = self.calc_d_loss(self.real, self.fake)
self.g_variables = tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES, scope='generator')
self.d_variables = tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES, scope='discriminator')
def generator(self, x, is_training):
with tf.variable_scope('generator'):
with tf.variable_scope('conv1'):
x = conv_layer(x, [5, 5, 3, 64], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv2'):
x = conv_layer(x, [3, 3, 64, 128], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv3'):
x = conv_layer(x, [3, 3, 128, 128], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv4'):
x = conv_layer(x, [3, 3, 128, 256], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv5'):
x = conv_layer(x, [3, 3, 256, 256], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv6'):
x = conv_layer(x, [3, 3, 256, 256], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('dilated1'):
x = dilated_conv_layer(x, [3, 3, 256, 256], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('dilated2'):
x = dilated_conv_layer(x, [3, 3, 256, 256], 4)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('dilated3'):
x = dilated_conv_layer(x, [3, 3, 256, 256], 8)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('dilated4'):
x = dilated_conv_layer(x, [3, 3, 256, 256], 16)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv7'):
x = conv_layer(x, [3, 3, 256, 256], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv8'):
x = conv_layer(x, [3, 3, 256, 256], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('deconv1'):
x = deconv_layer(x, [4, 4, 128, 256], [self.batch_size, 64, 64, 128], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv9'):
x = conv_layer(x, [3, 3, 128, 128], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('deconv2'):
x = deconv_layer(x, [4, 4, 64, 128], [self.batch_size, 128, 128, 64], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv10'):
x = conv_layer(x, [3, 3, 64, 32], 1)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv11'):
x = conv_layer(x, [3, 3, 32, 3], 1)
x = tf.nn.tanh(x)
return x
def discriminator(self, global_x, local_x, reuse):
def global_discriminator(x):
is_training = tf.constant(True)
with tf.variable_scope('global'):
with tf.variable_scope('conv1'):
x = conv_layer(x, [5, 5, 3, 64], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv2'):
x = conv_layer(x, [5, 5, 64, 128], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv3'):
x = conv_layer(x, [5, 5, 128, 256], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv4'):
x = conv_layer(x, [5, 5, 256, 512], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv5'):
x = conv_layer(x, [5, 5, 512, 512], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('fc'):
x = flatten_layer(x)
x = full_connection_layer(x, 1024)
return x
def local_discriminator(x):
is_training = tf.constant(True)
with tf.variable_scope('local'):
with tf.variable_scope('conv1'):
x = conv_layer(x, [5, 5, 3, 64], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv2'):
x = conv_layer(x, [5, 5, 64, 128], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv3'):
x = conv_layer(x, [5, 5, 128, 256], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('conv4'):
x = conv_layer(x, [5, 5, 256, 512], 2)
x = batch_normalize(x, is_training)
x = tf.nn.relu(x)
with tf.variable_scope('fc'):
x = flatten_layer(x)
x = full_connection_layer(x, 1024)
return x
with tf.variable_scope('discriminator', reuse=reuse):
global_output = global_discriminator(global_x)
local_output = local_discriminator(local_x)
with tf.variable_scope('concatenation'):
output = tf.concat((global_output, local_output), 1)
output = full_connection_layer(output, 1)
return output
def calc_g_loss(self, x, completion):
loss = tf.nn.l2_loss(x - completion)
return tf.reduce_mean(loss)
def calc_d_loss(self, real, fake):
alpha = 4e-4
d_loss_real = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=real, labels=tf.ones_like(real)))
d_loss_fake = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=fake, labels=tf.zeros_like(fake)))
return tf.add(d_loss_real, d_loss_fake) * alpha