def encoder(self, images, is_training):
activation_fn = leaky_relu # tf.nn.relu
weight_decay = 0.0
with tf.variable_scope('encoder'):
with slim.arg_scope([slim.batch_norm],
is_training=is_training):
with slim.arg_scope([slim.conv2d, slim.fully_connected],
weights_initializer=tf.truncated_normal_initializer(stddev=0.1),
weights_regularizer=slim.l2_regularizer(weight_decay),
normalizer_fn=slim.batch_norm,
normalizer_params=self.batch_norm_params):
net = slim.conv2d(images, 32, [4, 4], 2, activation_fn=activation_fn, scope='Conv2d_1')
net = slim.conv2d(net, 64, [4, 4], 2, activation_fn=activation_fn, scope='Conv2d_2')
net = slim.conv2d(net, 128, [4, 4], 2, activation_fn=activation_fn, scope='Conv2d_3')
net = slim.conv2d(net, 256, [4, 4], 2, activation_fn=activation_fn, scope='Conv2d_4')
net = slim.conv2d(net, 512, [4, 4], 2, activation_fn=activation_fn, scope='Conv2d_5')
net = slim.flatten(net)
fc1 = slim.fully_connected(net, self.latent_variable_dim, activation_fn=None, normalizer_fn=None, scope='Fc_1')
fc2 = slim.fully_connected(net, self.latent_variable_dim, activation_fn=None, normalizer_fn=None, scope='Fc_2')
return fc1, fc2
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