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import tensorflow as tf | |
from layers import inception_module, downsample, conv, initializer | |
SIZE=128 | |
def encoder(x): | |
with tf.variable_scope("encoder"): | |
net = inception_module(x, 32) | |
net = downsample(net, 2) | |
net = inception_module(net, 32) | |
net = downsample(net, 2) | |
net = inception_module(net, 16) | |
net = downsample(net, 2) | |
net = conv(net, 32, 1) | |
net = tf.reshape(net, [-1, net.shape[1]*net.shape[2]*net.shape[3]]) | |
net = tf.layers.dense(net, units=(SIZE//16*SIZE//16*32), activation=tf.nn.sigmoid, kernel_initializer=initializer) | |
return net | |
def decoder(x): | |
with tf.variable_scope("decoder"): | |
net = tf.reshape(x, shape=[-1, SIZE//16,SIZE//16,32]) | |
net = tf.layers.conv2d_transpose(net, filters=512, kernel_size=5, strides=2, padding="same", kernel_initializer=initializer) | |
net = tf.layers.batch_normalization(net) | |
net = tf.nn.relu(net) | |
net = tf.layers.conv2d_transpose(net, filters=256, kernel_size=5, strides=2, padding="same", kernel_initializer=initializer) | |
net = tf.layers.batch_normalization(net) | |
net = tf.nn.relu(net) | |
net = tf.layers.conv2d_transpose(net, filters=64 , kernel_size=5, strides=2, padding="same", kernel_initializer=initializer) | |
net = tf.layers.batch_normalization(net) | |
net = tf.nn.relu(net) | |
net = tf.layers.conv2d_transpose(net, filters=32 , kernel_size=5, strides=2, padding="same", kernel_initializer=initializer) | |
net = tf.layers.batch_normalization(net) | |
net = tf.nn.relu(net) | |
net = tf.layers.conv2d_transpose(net, filters=3, kernel_size=5, activation=tf.nn.sigmoid, padding="same") | |
return net | |
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