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model.py
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model.py
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import tensorflow as tf
import tensorflow.contrib as tc
import tensorflow.contrib.layers as tcl
#the default is relu function
def leaky_relu(x, alpha=0.2):
return tf.maximum(tf.minimum(0.0, alpha * x), x)
#return tf.maximum(0.0, x)
#return tf.nn.tanh(x)
#return tf.nn.elu(x)
def conv_cond_concat(x, y):
"""Concatenate conditioning vector on feature map axis."""
x_shapes = x.get_shape()
y_shapes = y.get_shape()
return tf.concat([x , y*tf.ones([tf.shape(x)[0], tf.shape(x)[1], tf.shape(x)[2] ,tf.shape(y)[3]])], 3)
class Discriminator(object):
def __init__(self, input_dim, name, nb_layers=2,nb_units=256):
self.input_dim = input_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
def __call__(self, x, reuse=True):
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
fc = tcl.fully_connected(
x, self.nb_units,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
#fc = tcl.batch_norm(fc)
fc = leaky_relu(fc)
for _ in range(self.nb_layers-1):
fc = tcl.fully_connected(
fc, self.nb_units,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
fc = tcl.batch_norm(fc)
#fc = leaky_relu(fc)
fc = tf.nn.tanh(fc)
output = tcl.fully_connected(
fc, 1,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
return output
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]
class Generator(object):
def __init__(self, input_dim, output_dim, name, nb_layers=2, nb_units=256, concat_every_fcl=True):
self.input_dim = input_dim
self.output_dim = output_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
self.concat_every_fcl = concat_every_fcl
def __call__(self, z, reuse=True):
#with tf.variable_scope(self.name,reuse=tf.AUTO_REUSE) as vs:
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
y = z[:,self.input_dim:]
fc = tcl.fully_connected(
z, self.nb_units,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tcl.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
#fc = tc.layers.batch_norm(fc,decay=0.9,scale=True,updates_collections=None,is_training = True)
fc = leaky_relu(fc)
#fc = tf.nn.dropout(fc,0.1)
if self.concat_every_fcl:
fc = tf.concat([fc, y], 1)
for _ in range(self.nb_layers-1):
fc = tcl.fully_connected(
fc, self.nb_units,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tcl.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
#fc = tc.layers.batch_norm(fc,decay=0.9,scale=True,updates_collections=None,is_training = True)
fc = leaky_relu(fc)
if self.concat_every_fcl:
fc = tf.concat([fc, y], 1)
output = tcl.fully_connected(
fc, self.output_dim,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tcl.l2_regularizer(2.5e-5),
#activation_fn=tf.sigmoid
activation_fn=tf.identity
)
#output = tc.layers.batch_norm(output,decay=0.9,scale=True,updates_collections=None,is_training = True)
#output = tf.nn.relu(output)
return output
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]
class Encoder(object):
def __init__(self, input_dim, output_dim, feat_dim, name, nb_layers=2, nb_units=256):
self.input_dim = input_dim
self.output_dim = output_dim
self.feat_dim = feat_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
def __call__(self, x, reuse=True):
#with tf.variable_scope(self.name,reuse=tf.AUTO_REUSE) as vs:
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
fc = tcl.fully_connected(
x, self.nb_units,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
fc = leaky_relu(fc)
for _ in range(self.nb_layers-1):
fc = tcl.fully_connected(
fc, self.nb_units,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
fc = leaky_relu(fc)
output = tcl.fully_connected(
fc, self.output_dim,
#weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
logits = output[:, self.feat_dim:]
y = tf.nn.softmax(logits)
#return output[:, 0:self.feat_dim], y, logits
return output, y
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]
class Discriminator_img(object):
def __init__(self, input_dim, name, nb_layers=2,nb_units=256,dataset='mnist'):
self.input_dim = input_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
self.dataset = dataset
def __call__(self, z, reuse=True):
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
bs = tf.shape(z)[0]
if self.dataset=="mnist":
z = tf.reshape(z, [bs, 28, 28, 1])
elif self.dataset=="cifar10":
z = tf.reshape(z, [bs, 32, 32, 3])
conv = tcl.convolution2d(z, 64, [4,4],[2,2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
#(bs, 14, 14, 32)
conv = leaky_relu(conv)
for _ in range(self.nb_layers-1):
conv = tcl.convolution2d(conv, 128, [4,4],[2,2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
#conv = tc.layers.batch_norm(conv,decay=0.9,scale=True,updates_collections=None)
conv = leaky_relu(conv)
#(bs, 7, 7, 32)
#fc = tf.reshape(conv, [bs, -1])
fc = tcl.flatten(conv)
#(bs, 1568)
fc = tcl.fully_connected(
fc, 1024,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
activation_fn=tf.identity
)
#fc = tc.layers.batch_norm(fc,decay=0.9,scale=True,updates_collections=None)
fc = leaky_relu(fc)
output = tcl.fully_connected(
fc, 1,
activation_fn=tf.identity
)
return output
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]
#generator for images, G()
class Generator_img(object):
def __init__(self, nb_classes, output_dim, name, nb_layers=2,nb_units=256,dataset='mnist',is_training=True):
self.nb_classes = nb_classes
self.output_dim = output_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
self.dataset = dataset
self.is_training = is_training
def __call__(self, z, reuse=True):
#with tf.variable_scope(self.name,reuse=tf.AUTO_REUSE) as vs:
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
bs = tf.shape(z)[0]
y = z[:,-10:]
#yb = tf.reshape(y, shape=[bs, 1, 1, 10])
fc = tcl.fully_connected(
z, 1024,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
fc = tc.layers.batch_norm(fc,decay=0.9,scale=True,updates_collections=None,is_training = self.is_training)
fc = tf.nn.relu(fc)
#fc = tf.concat([fc, y], 1)
if self.dataset=='mnist':
fc = tcl.fully_connected(
fc, 7*7*128,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
fc = tf.reshape(fc, tf.stack([bs, 7, 7, 128]))
elif self.dataset=='cifar10':
fc = tcl.fully_connected(
fc, 8*8*128,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
fc = tf.reshape(fc, tf.stack([bs, 8, 8, 128]))
fc = tc.layers.batch_norm(fc,decay=0.9,scale=True,updates_collections=None,is_training = self.is_training)
fc = tf.nn.relu(fc)
#fc = conv_cond_concat(fc,yb)
conv = tcl.convolution2d_transpose(
fc, 64, [4,4], [2,2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
#(bs,14,14,64)
conv = tc.layers.batch_norm(conv,decay=0.9,scale=True,updates_collections=None,is_training = self.is_training)
conv = tf.nn.relu(conv)
if self.dataset=='mnist':
output = tcl.convolution2d_transpose(
conv, 1, [4, 4], [2, 2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.nn.sigmoid
)
output = tf.reshape(output, [bs, -1])
elif self.dataset=='cifar10':
output = tcl.convolution2d_transpose(
conv, 3, [4, 4], [2, 2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.nn.sigmoid
)
output = tf.reshape(output, [bs, -1])
#(0,1) by tanh
return output
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]
#encoder for images, H()
class Encoder_img(object):
def __init__(self, nb_classes, output_dim, name, nb_layers=2,nb_units=256,dataset='mnist',cond=True):
self.nb_classes = nb_classes
self.output_dim = output_dim
self.name = name
self.nb_layers = nb_layers
self.nb_units = nb_units
self.dataset = dataset
self.cond = cond
def __call__(self, x, reuse=True):
with tf.variable_scope(self.name) as vs:
if reuse:
vs.reuse_variables()
bs = tf.shape(x)[0]
if self.dataset=="mnist":
x = tf.reshape(x, [bs, 28, 28, 1])
elif self.dataset=="cifar10":
x = tf.reshape(x, [bs, 32, 32, 3])
conv = tcl.convolution2d(x,64,[4,4],[2,2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
conv = leaky_relu(conv)
for _ in range(self.nb_layers-1):
conv = tcl.convolution2d(conv, self.nb_units, [4,4],[2,2],
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity
)
conv = leaky_relu(conv)
conv = tcl.flatten(conv)
fc = tcl.fully_connected(conv, 1024,
weights_initializer=tf.random_normal_initializer(stddev=0.02),
weights_regularizer=tc.layers.l2_regularizer(2.5e-5),
activation_fn=tf.identity)
fc = leaky_relu(fc)
output = tcl.fully_connected(
fc, self.output_dim,
activation_fn=tf.identity
)
logits = output[:, -self.nb_classes:]
y = tf.nn.softmax(logits)
return output[:, :-self.nb_classes], y, logits
@property
def vars(self):
return [var for var in tf.global_variables() if self.name in var.name]