def build_decoder(batch_size, inputenc, name="decoder"):
with tf.variable_scope(name):
g1 = fc(inputenc, 64, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 128, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 256, scope='dec_fc3', activation_fn=tf.nn.relu)
x_hat = fc(g3, input_dim, scope='dec_fc4', activation_fn=tf.sigmoid)
return x_hat
def _net(net, hidden_layer_size=16):
net = fc(net, hidden_layer_size, activation_fn=tf.nn.sigmoid, scope='fc0',
weights_initializer =\
tf.random_normal_initializer(stddev=1/np.sqrt(observation_size)))
net = fc(net, action_size, activation_fn=tf.nn.softmax, scope='fc1',
weights_initializer =\
tf.random_normal_initializer(stddev=1/np.sqrt(hidden_layer_size)))
return net
def createNetworkDU(self, X, iStep):
with tf.compat.v1.variable_scope("NetWork"+str(iStep), reuse=tf.compat.v1.AUTO_REUSE):
fPrev= fc(X, int(self.layerSize[0]), scope='enc_fc1', activation_fn=self.activation)
for i in np.arange(len(self.layerSize)-1):
scopeName='enc_fc'+str(i+2)
f = fc(fPrev,int(self.layerSize[i+1]), scope=scopeName, activation_fn=self.activation)
fPrev = f
Z = fc(fPrev,self.d, scope='uPDu',activation_fn= None)
return Z
def createNetwork(self, X,iStep, renormalizeFactor):
with tf.compat.v1.variable_scope("NetWorkU"+str(iStep) , reuse=tf.compat.v1.AUTO_REUSE):
fPrev= fc(X, int(self.layerSize[0]), scope='enc_fc1', activation_fn=self.activation)
for i in np.arange(len(self.layerSize)-1):
scopeName='enc_fc'+str(i+2)
f = fc(fPrev,int(self.layerSize[i+1]), scope=scopeName, activation_fn=self.activation)
fPrev = f
UZ = fc(fPrev,1, scope='UZ',activation_fn= None)
return UZ[:,0]
def createNetwork(self, t, x):
time_and_X = tf.concat([t,x], axis=-1)
with tf.variable_scope("NetWork" , reuse=tf.AUTO_REUSE):
fPrev= fc(time_and_X, self.layerSize[0], scope='enc_fc1', activation_fn=self.activation)
for i in np.arange(len(self.layerSize)-1):
scopeName='enc_fc'+str(i+2)
f = fc(fPrev,self.layerSize[i+1], scope=scopeName, activation_fn=self.activation)
fPrev = f
U = fc(fPrev,1, scope='uPDu',activation_fn= None)
return U
def build(self):
# input
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, input_dim])
# encoder
# slim.fc(input, outputdim, scope, act_fn)
f1 = fc(self.x, 512, scope='enc_fc1', activation_fn=tf.nn.elu)
f2 = fc(f1, 384, scope='enc_fc2', activation_fn=tf.nn.elu)
f3 = fc(f2, 256, scope='enc_fc3', activation_fn=tf.nn.elu)
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
# log (sigma^2)
self.z_log_sigma_sq = fc(f3,
self.n_z,
scope='enc_fc4_sigma',
activation_fn=None)
# N(z_mu, z_sigma)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32) # Unigaussian
self.z = self.z_mu + tf.sqrt(tf.exp(
self.z_log_sigma_sq)) * eps # Reversing to get back sigma
# decoder
g1 = fc(self.z, 256, scope='dec_fc1', activation_fn=tf.nn.elu)
g2 = fc(g1, 384, scope='dec_fc2', activation_fn=tf.nn.elu)
g3 = fc(g2, 512, scope='dec_fc3', activation_fn=tf.nn.elu)
self.x_hat = fc(g3,
input_dim,
scope='dec_fc4',
activation_fn=tf.sigmoid) # sigmoid b/c onehot encoded
# losses
# reconstruction loss
# x <-> x_hat
# H(x, x_hat) = - \Sigma x * log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-10 # to prevent log(0)
recon_loss = -tf.reduce_sum(
self.x * tf.log(self.x_hat + epsilon) +
(1 - self.x) * tf.log(1 - self.x_hat + epsilon),
axis=1)
# latent loss
# KL divergence: measure the difference between two distributions
# the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(
self.z_mu) - tf.exp(self.z_log_sigma_sq),
axis=1)
# total loss
self.total_loss = tf.reduce_mean(recon_loss + latent_loss)
# optimizer
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
def generator(self, z, reuse=False):
with tf.variable_scope('generator') as scope:
if reuse:
scope.reuse_variables()
w1 = tf.Variable(tf.random_normal(shape=[]))
g1 = fc(z,
self.g_hidden_size,
scope='gen_fc1',
activation_fn=tf.nn.relu)
g_log = fc(g1, self.img_dim, scope='gen_fc2', activation_fn=None)
g2 = tf.nn.sigmoid(g_log)
return g_log, g2
def createNetworkNotTrainable(self, X, iStep, weightInit, biasInit):
with tf.compat.v1.variable_scope("NetWorkGamNotTrain" + "_" +
str(iStep),
reuse=False):
cMinW = 0
cMinB = 0
fPrev = fc(X,
int(self.layerSize[0]),
scope='enc_fc1',
activation_fn=self.activation,
weights_initializer=tf.constant_initializer(
np.reshape(weightInit[:self.d * self.layerSize[0]],
[self.d, self.layerSize[0]])),
biases_initializer=tf.constant_initializer(
biasInit[0:self.layerSize[0]]),
trainable=False)
cMinW += self.d * self.layerSize[0]
cMinB += self.layerSize[0]
for i in np.arange(len(self.layerSize) - 1):
scopeName = 'enc_fc' + str(i + 2)
f = fc(fPrev,
int(self.layerSize[i + 1]),
scope=scopeName,
activation_fn=self.activation,
weights_initializer=tf.constant_initializer(
np.reshape(
weightInit[cMinW:cMinW + self.layerSize[i] *
self.layerSize[i + 1]],
[self.layerSize[i], self.layerSize[i + 1]])),
biases_initializer=tf.constant_initializer(
biasInit[cMinB:cMinB + self.layerSize[i + 1]]),
trainable=False)
cMinW += self.layerSize[i] * self.layerSize[i + 1]
cMinB += self.layerSize[i + 1]
fPrev = f
# D2U -> d^2
sizeFin = int(self.d * self.d)
ZGam = fc(
fPrev,
sizeFin,
scope='Gam',
activation_fn=None,
weights_initializer=tf.constant_initializer(
np.reshape(
weightInit[cMinW:cMinW +
self.layerSize[len(self.layerSize) - 1] *
sizeFin],
[self.layerSize[len(self.layerSize) - 1], sizeFin])),
biases_initializer=tf.constant_initializer(
biasInit[cMinB:cMinB + sizeFin]),
trainable=False)
return tf.reshape(ZGam, [tf.shape(X)[0], self.d, self.d])
def build(self):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, input_dim])
n_hidden_f1 = 512
n_hidden_f2 = 384
n_hidden_f3 = 256
# Encode
# x -> z_mean, z_sigma -> z
f1 = fc(self.x, n_hidden_f1, scope='enc_fc1',
activation_fn=tf.nn.elu) # AUTOREUSE
f2 = fc(f1, n_hidden_f2, scope='enc_fc2', activation_fn=tf.nn.elu)
f3 = fc(f2, n_hidden_f3, scope='enc_fc3', activation_fn=tf.nn.elu)
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3,
self.n_z,
scope='enc_fc4_sigma',
activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32)
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z -> x_hat
g1 = fc(self.z, n_hidden_f3, scope='dec_fc1', activation_fn=tf.nn.elu)
g2 = fc(g1, n_hidden_f2, scope='dec_fc2', activation_fn=tf.nn.elu)
g3 = fc(g2, n_hidden_f1, scope='dec_fc3', activation_fn=tf.nn.elu)
self.x_hat = fc(g3,
input_dim,
scope='dec_fc4',
activation_fn=tf.sigmoid)
# Loss: Reconstruction loss: Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-10
recon_loss = -tf.reduce_sum(
self.x * tf.log(epsilon + self.x_hat) +
(1 - self.x) * tf.log(epsilon + 1 - self.x_hat),
axis=1)
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(
self.z_mu) - tf.exp(self.z_log_sigma_sq),
axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(recon_loss + latent_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
return
def build(self):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, self.input_dim])
# Encode
# x -> z_mean, z_sigma -> z
f1 = fc(self.x, 256, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 128, scope='enc_fc2', activation_fn=tf.nn.relu)
f3 = fc(f2, 64, scope='enc_fc3', activation_fn=tf.nn.relu)
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3,
self.n_z,
scope='enc_fc4_sigma',
activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32)
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z -> x_hat
g1 = fc(self.z, 64, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 128, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 256, scope='dec_fc3', activation_fn=tf.nn.relu)
self.x_hat = fc(g3,
self.input_dim,
scope='dec_fc4',
activation_fn=tf.sigmoid)
# Loss
# Reconstruction loss
# Mean-squared error loss
self.recon_loss = tf.reduce_mean(
tf.squared_difference(self.x, self.x_hat))
# Latent loss
# KL divergence: measure the difference between two distributions
# Here we measure the divergence between
# the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(
self.z_mu) - tf.exp(self.z_log_sigma_sq),
axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = self.recon_loss + self.latent_loss
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
self.losses = {
'recon_loss': self.recon_loss,
'latent_loss': self.latent_loss,
'total_loss': self.total_loss,
}
return
def createNetworkWithInitializer(self, X, iStep, weightInit, biasInit,
renormalizeFactor):
with tf.compat.v1.variable_scope("NetWorkUZ" + str(iStep),
reuse=tf.compat.v1.AUTO_REUSE):
cMinW = 0
cMinB = 0
fPrev = fc(X,
int(self.layerSize[0]),
scope='enc_fc1',
activation_fn=self.activation,
weights_initializer=tf.constant_initializer(
np.reshape(weightInit[:self.d * self.layerSize[0]],
[self.d, self.layerSize[0]])),
biases_initializer=tf.constant_initializer(
biasInit[0:self.layerSize[0]]),
trainable=True)
cMinW += self.d * self.layerSize[0]
cMinB += self.layerSize[0]
for i in np.arange(len(self.layerSize) - 1):
scopeName = 'enc_fc' + str(i + 2)
f = fc(fPrev,
int(self.layerSize[i + 1]),
scope=scopeName,
activation_fn=self.activation,
weights_initializer=tf.constant_initializer(
np.reshape(
weightInit[cMinW:cMinW + self.layerSize[i] *
self.layerSize[i + 1]],
[self.layerSize[i], self.layerSize[i + 1]])),
biases_initializer=tf.constant_initializer(
biasInit[cMinB:cMinB + self.layerSize[i + 1]]),
trainable=True)
cMinW += self.layerSize[i] * self.layerSize[i + 1]
cMinB += self.layerSize[i + 1]
fPrev = f
UDU = fc(
fPrev,
self.d + 1,
scope='UZ',
activation_fn=None,
weights_initializer=tf.constant_initializer(
np.reshape(
weightInit[cMinW:cMinW +
self.layerSize[len(self.layerSize) - 1] *
(self.d + 1)],
[self.layerSize[len(self.layerSize) - 1], self.d + 1
])),
biases_initializer=tf.constant_initializer(
biasInit[cMinB:cMinB + (self.d + 1)]),
trainable=True)
return UDU[:, 0], UDU[:, 1:]
def __build_graph__(self, layers, cond_sz):
input_sz = layers[0]
latent_sz = layers[-1] / 2
# encoder (parametrization of approximate posterior q(z|x))
x = tf.placeholder(tf.float32, [None, input_sz]) # input layer
y = tf.placeholder(tf.float32, [None, cond_sz]) # input layer
with tf.variable_scope('encoder', reuse=False):
fc_x = tf.concat([x, y], axis=1)
for hidden in layers[1:-1]: # hidden layers
fc_x = fc(fc_x, hidden)
z_param = fc(fc_x, latent_sz * 2, activation_fn=None)
z_log_sigma_sq = z_param[:, :
latent_sz] # log deviation square of q(z|x)
z_mu = z_param[:, latent_sz:] # mean of q(z|x)
# sample latent variable z from q(z|x)
eps = tf.random_normal(shape=tf.shape(z_log_sigma_sq))
z = tf.sqrt(tf.exp(z_log_sigma_sq)) * eps + z_mu
# decoder (parametrization of likelihood p(x|z))
# it follows the mirror structure of encoder
with tf.variable_scope('decoder', reuse=False):
fc_z = tf.concat([z, y], axis=1)
for hidden in layers[::-1][1:-1]: # hidden layers
fc_z = fc(fc_z, hidden)
x_hat = fc(fc_z, input_sz,
activation_fn=tf.sigmoid) # reconstruction layer
# loss: negative of Evidence Lower BOund (ELBO)
# 1. KL-divergence: KL(q(z|x)||p(z))
# (divergence between two multi-variate normal distribution, please refer to wikipedia)
kl_loss = -tf.reduce_mean(0.5 * tf.reduce_sum( \
1+z_log_sigma_sq-tf.square(z_mu)-tf.exp(z_log_sigma_sq), axis=1))
# 2. Likelihood: p(x|z)
# also called as reconstruction loss
# we parametrized it with binary cross-entropy loss as MNIST contains binary images
eps = 1e-10 # add small number to avoid log(0.0)
recon_loss = tf.reduce_mean(-tf.reduce_sum( \
x * tf.log(eps + x_hat) + (1 - x) * tf.log(1 - x_hat + eps), axis=1))
total_loss = kl_loss + 3 * recon_loss
# record variables
self.z = z
self.total_loss, self.recon_loss, self.kl_loss = total_loss, recon_loss, kl_loss
self.x, self.y, self.x_hat = x, y, x_hat
def build_encoder(batch_size, inputenc, name="encoder"):
with tf.variable_scope(name):
# Encode
# x -> z_mean, z_sigma -> z
# inputenc = tf.reshape(inputenc, [-1, inputenc.getshape().as_list()[0]])
f1 = fc(inputenc, 256, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 128, scope='enc_fc2', activation_fn=tf.nn.relu)
f3 = fc(f2, 64, scope='enc_fc3', activation_fn=tf.nn.relu)
z_mu = fc(f3, n_z, scope='enc_fc4_mu', activation_fn=None)
z_log_sigma_sq = fc(f3, n_z, scope='enc_fc4_sigma', activation_fn=None)
eps = tf.random_normal(shape=tf.shape(z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32)
z = z_mu + tf.sqrt(tf.exp(z_log_sigma_sq)) * eps
return f2, z
def build(self):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, self.input_dim])
f1 = fc(self.x, 10, scope='fc1', activation_fn=tf.nn.elu)
f2 = fc(f1, 10, scope='fc2', activation_fn=tf.nn.elu)
self.strategy = fc(f2,
self.n,
scope='fc3',
activation_fn=tf.nn.sigmoid)
self.strategy = self.strategy / tf.reduce_sum(self.strategy)
self.u = self.utility(self.x, self.strategy, self.input_dim)
# Loss
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.u)
return
def createNetwork(self, X, iStep, renormalizeFactor):
with tf.compat.v1.variable_scope("NetWorkGam" + str(iStep),
reuse=tf.compat.v1.AUTO_REUSE):
fPrev = fc(X,
int(self.layerSize[0]),
scope='enc_fc1',
activation_fn=self.activation)
for i in np.arange(len(self.layerSize) - 1):
scopeName = 'enc_fc' + str(i + 2)
f = fc(fPrev,
int(self.layerSize[i + 1]),
scope=scopeName,
activation_fn=self.activation)
fPrev = f
# D2U -> d^2
sizeFin = int(self.d * self.d)
ZGam = fc(fPrev, sizeFin, scope='Gam', activation_fn=None)
return tf.reshape(ZGam, [tf.shape(X)[0], self.d, self.d])
def createNetworkWithInitializer(self, X, iStep, weightInit, biasInit, renormalizeFactor):
with tf.compat.v1.variable_scope("NetWork"+str(iStep) , reuse=tf.compat.v1.AUTO_REUSE):
cMinW =0
cMinB= 0
fPrev= fc(X, int(self.layerSize[0]), scope='enc_fc1', activation_fn=self.activation, weights_initializer=tf.constant_initializer(np.reshape(weightInit[:self.d*int(self.layerSize[0])],[self.d,int(self.layerSize[0])])), biases_initializer= tf.constant_initializer(biasInit[0:int(self.layerSize[0])]) )
cMinW += self.d*int(self.layerSize[0])
cMinB += int( self.layerSize[0])
for i in np.arange(len(self.layerSize)-1):
scopeName='enc_fc'+str(i+2)
f = fc(fPrev,int(self.layerSize[i+1]), scope=scopeName, activation_fn=self.activation, weights_initializer=tf.constant_initializer(np.reshape(weightInit[cMinW : cMinW+int(self.layerSize[i])*int(self.layerSize[i+1])],[int(self.layerSize[i]),int(self.layerSize[i+1])])) , biases_initializer= tf.constant_initializer(biasInit[cMinB:cMinB+int(self.layerSize[i+1])]))
cMinW+= int(self.layerSize[i])*int(self.layerSize[i+1])
cMinB+= int(self.layerSize[i+1])
fPrev = f
U = fc(fPrev,1, scope='U',activation_fn= None, weights_initializer=tf.constant_initializer(np.reshape(weightInit[cMinW:cMinW+int(self.layerSize[len(self.layerSize)-1])],
[int(self.layerSize[len(self.layerSize)-1]),1])),
biases_initializer= tf.constant_initializer(biasInit[cMinB:cMinB+1]))
DU = tf.gradients(U,X)
return U[:,0], DU[0]/renormalizeFactor
def decoder(latent_var, hidden_dim, n_layers, activation, drop_rate,
is_training):
"""
decoder function
:param latent_var: latent space sample
:param hidden_dim: number of nodes in hidden layers
:param n_layers: number of hidden layers
:param activation: activation function
:param drop_rate: dropout rate
:param is_training: dropout during network traning
:returns: last hidden layer
"""
hidden_dec = []
hidden_dec_bn = []
for i in range(n_layers):
if i == 0:
hidden_dec.append(
fc(latent_var, hidden_dim, scope="hidden_dec%i" % i))
hidden_dec_bn.append(
tf.layers.batch_normalization(hidden_dec[i],
name="hidden_dec%i_bn" % i))
if drop_rate > 0:
hidden_dec_bn.append(
tf.layers.dropout(hidden_dec_bn[i],
rate=drop_rate,
name="hiddden_dec%i_dp" % i,
training=is_training))
else:
hidden_dec_bn.append(hidden_dec_bn[i])
else:
hidden_dec.append(
fc(hidden_dec_bn[i], hidden_dim, scope="hidden_dec%i" % i))
hidden_dec_bn.append(
tf.layers.batch_normalization(hidden_dec[i],
name="hidden_dec%i_bn" % i))
if drop_rate > 0:
hidden_dec_bn.append(
tf.layers.dropout(hidden_dec_bn[i + 1],
rate=drop_rate,
name="hiddden_dec%i_dp" % i,
training=is_training))
return hidden_dec_bn[-1]
def encoder(batch, hidden_dim, n_layers, activation, drop_rate, is_training):
"""
encoder function
:param batch: normalized daya batch
:param hidden_dim: number of nodes in hidden layers
:param n_layers: number of hidden layers
:param activation: activation function
:param drop_rate: dropout rate
:param is_training: dropout during network traning
:returns: last hidden layer
"""
hidden_enc = []
hidden_enc_bn = []
for i in range(n_layers):
if i == 0:
hidden_enc.append(fc(batch, hidden_dim, scope="hidden_in%i" % i))
hidden_enc_bn.append(
tf.layers.batch_normalization(hidden_enc[i],
name="hidden_in%i_bn" % i))
if drop_rate > 0:
hidden_enc_bn.append(
tf.layers.dropout(hidden_enc_bn[i],
rate=drop_rate,
name="hiddden_in%i_dp" % i,
training=is_training))
else:
hidden_enc_bn.append(hidden_enc_bn[i])
else:
hidden_enc.append(
fc(hidden_enc_bn[i], hidden_dim, scope="hidden_in%i" % i))
hidden_enc_bn.append(
tf.layers.batch_normalization(hidden_enc[i],
name="hidden_in%i_bn" % i))
if drop_rate > 0:
hidden_enc_bn.append(
tf.layers.dropout(hidden_enc_bn[i + 1],
rate=drop_rate,
name="hiddden_in%i_dp" % i,
training=is_training))
return hidden_enc_bn[-1]
def discriminator(self, x, reuse=False):
with tf.variable_scope(
'discriminator',
reuse=reuse) as scope: ### reuse = tf.AUTO_REUSE
#if reuse:
# scope.reuse_variables()
'''
w1 = tf.Variable(tf.random_normal(shape = [x.get_shape()[1], self.d_hidden_size], dtype = tf.float32))
b1 = tf.Variable(tf.zeros([self.d_hidden_size],dtype=tf.float32))
w2 = tf.Variable(tf.random_normal(shape = [self.d_hidden_size, 1], dtype = tf.float32))
b2 = tf.Variable(tf.zeros([1],dtype=tf.float32))
h1 = tf.nn.relu(tf.matmul(x, w1) + b1)
h2 = tf.matmul(h1,w2) + b2
h2_act = tf.nn.sigmoid(h2)'''
d1 = fc(x,
self.d_hidden_size,
scope='dis_fc1',
activation_fn=tf.nn.relu)
d_log = fc(d1, 1, scope='dis_fc2', activation_fn=None)
d2 = tf.nn.sigmoid(d_log)
return d_log, d2
def build(self, input_dim):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, input_dim])
# Encode
# x -> z_mean, z_sigma -> z
f1 = fc(self.x,
self.hidden_layers[0],
scope='ae_enc_fc1',
activation_fn=tf.nn.relu)
# f2 = fc(f1, 60, scope='enc_fc2', activation_fn=tf.nn.tanh)
f3 = fc(f1,
self.hidden_layers[1],
scope='ae_enc_fc3',
activation_fn=tf.nn.relu)
# f4 = fc(f3, 20, scope='enc_fc4', activation_fn=tf.nn.relu)
self.z = fc(f3,
self.hidden_layers[2],
scope='ae_enc_fc5_mu',
activation_fn=None)
# Decode
# z,y -> x_hat
# g1 = fc(self.Z, 20, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(self.z,
self.hidden_layers[1],
scope='ae_dec_fc2',
activation_fn=tf.nn.relu)
g3 = fc(g2,
self.hidden_layers[0],
scope='ae_dec_fc3',
activation_fn=tf.nn.relu)
# g4 = fc(g3, 85, scope='dec_fc4', activation_fn=tf.nn.tanh)
self.x_hat = fc(g3,
input_dim,
scope='ae_dec_fc5',
activation_fn=tf.sigmoid)
# self.x_res = self.x_hat[:,0:input_dim]
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
recon_loss = tf.reduce_mean(tf.square(self.x - self.x_hat),
1) # (((self.x - y)**2).mean(1)).mean()
# epsilon = 1e-10
# recon_loss = -tf.reduce_sum(
# self.x * tf.log(epsilon+self.x_hat) + (1-self.x) * tf.log(epsilon+1-self.x_hat),
# axis=1
# )
self.recon_loss = tf.reduce_mean(recon_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.recon_loss)
return
def build(self):
self.x = tf.placeholder(name='x', dtype=tf.float32, shape=[None, input_dim])
# Encode
# x -> z_mean, z_sigma -> z # input 28*28= 784
f1 = fc(self.x, 512, scope='enc_fc1', activation_fn=tf.nn.elu) # fully connected 512
f2 = fc(f1, 384, scope='enc_fc2', activation_fn=tf.nn.elu) # fully connected 384
f3 = fc(f2, 256, scope='enc_fc3', activation_fn=tf.nn.elu) # fully connected 256
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None) # fully connected to mu (default 10)
self.z_log_sigma_sq = fc(f3, self.n_z, scope='enc_fc4_sigma', activation_fn=None) # fully connected to sigma (default 10)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq), # reparam trick
mean=0, stddev=1, dtype=tf.float32)
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps # combine mu with sigma * normal
# Decode
# z -> x_hat
g1 = fc(self.z, 256, scope='dec_fc1', activation_fn=tf.nn.elu) # fully connected from 2*n_z to 256
g2 = fc(g1, 384, scope='dec_fc2', activation_fn=tf.nn.elu) # fully connected to 384
g3 = fc(g2, 512, scope='dec_fc3', activation_fn=tf.nn.elu) # fully connected to 512
self.x_hat = fc(g3, input_dim, scope='dec_fc4', activation_fn=tf.sigmoid) # fully connected to 784
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-10
recon_loss = -tf.reduce_sum(
self.x * tf.log(epsilon+self.x_hat) + (1-self.x) * tf.log(epsilon+1-self.x_hat),
axis=1
)
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(
1 + self.z_log_sigma_sq - tf.square(self.z_mu) - tf.exp(self.z_log_sigma_sq), axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(recon_loss + latent_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
return
def createNetwork(self, X, iStep, renormalizeFactor):
with tf.compat.v1.variable_scope("NetWorkUZ" + str(iStep),
reuse=tf.compat.v1.AUTO_REUSE):
fPrev = fc(X,
int(self.layerSize[0]),
scope='enc_fc1',
activation_fn=self.activation)
for i in np.arange(len(self.layerSize) - 1):
scopeName = 'enc_fc' + str(i + 2)
f = fc(fPrev,
int(self.layerSize[i + 1]),
scope=scopeName,
activation_fn=self.activation)
fPrev = f
UZ = fc(fPrev, self.d + 1, scope='UZ', activation_fn=None)
Gam = []
for id in range(self.d):
Gam.append(
tf.gradients(UZ[:, 1 + id], X)[0] / renormalizeFactor)
Gam = tf.concat(Gam, axis=1)
return UZ[:, 0], UZ[:,
1:], tf.reshape(Gam,
[tf.shape(X)[0], self.d, self.d])
def build(self):
self.x = tf.placeholder(name='x', dtype=tf.float32, shape=[None, input_dim])
# Encode
# x -> z_mean, z_sigma -> z
f1 = fc(self.x, self.hidden_layers[0], scope='vae_enc_fc1', activation_fn=tf.nn.relu)
#f2 = fc(f1, 60, scope='enc_fc2', activation_fn=tf.nn.tanh)
f3 = fc(f1, self.hidden_layers[1], scope='vae_enc_fc3', activation_fn=tf.nn.relu)
#f4 = fc(f3, 20, scope='enc_fc4', activation_fn=tf.nn.relu)
self.z_mu = fc(f3, self.hidden_layers[2], scope='vae_enc_fc5_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3, self.hidden_layers[2], scope='vae_enc_fc5_sigma', activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0, stddev=1, dtype=tf.float32)
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z,y -> x_hat
# g1 = fc(self.Z, 20, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(self.z,self.hidden_layers[1], scope='vae_dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, self.hidden_layers[0], scope='vae_dec_fc3', activation_fn=tf.nn.relu)
#g4 = fc(g3, 85, scope='dec_fc4', activation_fn=tf.nn.tanh)
self.x_hat = fc(g3, input_dim, scope='vae_dec_fc5', activation_fn=tf.sigmoid)
#self.x_res = self.x_hat[:,0:input_dim]
# Loss
# Reconstruction loss
recon_loss = tf.reduce_mean(tf.square(self.x - self.x_hat),1) #(((self.x - y)**2).mean(1)).mean()
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
#original
latent_loss = -0.5 * tf.reduce_sum(
1 + self.z_log_sigma_sq - tf.square(self.z_mu) - tf.exp(self.z_log_sigma_sq) , axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(recon_loss +latent_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
return
def build_network(batch_size, inputenc, name="whole_network"):
with tf.variable_scope(name):
# Encode
# x -> z_mean, z_sigma -> z
f1 = fc(inputenc, 256, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 128, scope='enc_fc2', activation_fn=tf.nn.relu)
f3 = fc(f2, 64, scope='enc_fc3', activation_fn=tf.nn.relu)
z_mu = fc(f3, n_z, scope='enc_fc4_mu', activation_fn=None)
z_log_sigma_sq = fc(f3, n_z, scope='enc_fc4_sigma', activation_fn=None)
eps = tf.random_normal(shape=tf.shape(z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32)
z = z_mu + tf.sqrt(tf.exp(z_log_sigma_sq)) * eps
g1 = fc(z, 64, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 128, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 256, scope='dec_fc3', activation_fn=tf.nn.relu)
x_hat = fc(g3, input_dim, scope='dec_fc4', activation_fn=tf.sigmoid)
return f2, g2, x_hat, z_mu, z_log_sigma_sq
def build(self): #input self.x = tf.placeholder(name='x', dtype=tf.float32, shape=[None, input_dim]) #encoder #slim.fc(input, output_dim, scope, act_fn) f1= fc(self.x, 512, scope='enc_fc1', activation_fn = tf.nn.elu) f2= fc(f1, 384, scope='enc_fc2', activation_fn = tf.nn.elu) f3= fc(f2, 256, scope='enc_fc3', activation_fn = tf.nn.elu) self.z_mu = fc(f3,self.n_z, scope='enc_fc4_mu', activation_fn=None) #log(signma^2) self.z_log_sigma_sq = fc(f3,self.n_z, scope='enc_fc4_mu', activation_fn=None) #N(z_mu, z_sigma) eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),mean=0, stddev=1, dtype=tf.float32) self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps #decoder g1 = fc(self.z, 256, scope='dec_fc1', activation_fn=tf.nn.elu) g2 = fc(g1, 384, scope='dec_fc2', activation_fn=tf.nn.elu) g3 = fc(g2, 512, scope='dec_fc3', activation_fn=tf.nn.elu) self.x_hat = fc(g3, input_dim, scope='dec_fc4', activation_fn=tf.sigmoid) #losses #reconstruction loss #x <--> x_hat #H(x,x_hat) = - \Sigma x * log(x_hat) + (1-x) * log(1-x_hat) epsilon = 1e-10 recon_loss = -tf.reduce_sum(self.x * tf.log(self.x_hat + epsilon) + (1 - self.x)*tf.log(1- self.x_hat + epsilon) ) #latest loss #KL divergence: measure the different between two distributions #the latest distribution and N(0,1) latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(self.z_mu) - tf.exp(self.z_log_sigma_sq),axis=1)
def build(self, input_dim):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, input_dim])
Xnoise = self.x + self.noise_factor * tf.random_normal(tf.shape(
self.x))
Xnoise = tf.clip_by_value(Xnoise, 0., 1.)
# Encode
f1 = fc(Xnoise,
self.hidden_layers[0],
scope='dae_enc_fc1',
activation_fn=tf.nn.relu)
f2 = fc(f1,
self.hidden_layers[1],
scope='dae_enc_fc2',
activation_fn=tf.nn.relu)
self.z = fc(f2,
self.hidden_layers[2],
scope='dae_enc_fc3_mu',
activation_fn=None)
# Decode
g1 = fc(self.z,
self.hidden_layers[1],
scope='dae_dec_fc2',
activation_fn=tf.nn.relu)
g2 = fc(g1,
self.hidden_layers[0],
scope='dae_dec_fc1',
activation_fn=tf.nn.relu)
self.x_hat = fc(g2,
input_dim,
scope='dae_dec_xhat',
activation_fn=tf.nn.sigmoid)
recon_loss = tf.reduce_mean(tf.square(self.x - self.x_hat), 1)
self.recon_loss = tf.reduce_mean(recon_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(self.recon_loss)
return
def ae_network(self):
"""
The main structure of autoencoder network
:return:
"""
input_dim = self.x.get_shape()
self.x = tf.reshape(self.x,[input_dim[0],input_dim[1]])
input_dim = self.x.get_shape().as_list()[1]
print("input_dim:",input_dim)
# Encode
# x -> z
f1 = fc(self.x, 256, scope = 'enc_fc1', activation_fn = tf.nn.relu)
f3 = fc(f1, 64, scope = 'enc_fc3', activation_fn = tf.nn.relu)
z = fc(f3, self.nz, scope = 'enc_fc4', activation_fn = tf.nn.relu)
# Decode
# z -> x_hat
g1 = fc(z, 64, scope = 'dec_fc1', activation_fn = tf.nn.relu)
g3 = fc(g1, 256, scope = 'dec_fc3', activation_fn = tf.nn.relu)
self.x_hat = fc(g3, input_dim, scope = 'dec_fc4',
activation_fn = tf.sigmoid)
print("build graph done!")
def build(self):
self.x = tf.placeholder(name='x', dtype=tf.float32, shape=[None, input_dim])
# Encode
# x -> z_mean, z_sigma -> z
f0 = fc(self.x, 4096, scope='enc_fc0', activation_fn=tf.nn.elu, weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
f1 = fc(f0, 2048, scope='enc_fc1', activation_fn=tf.nn.elu, weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
f2 = fc(f1, 1024, scope='enc_fc2', activation_fn=tf.nn.elu, weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
f3 = fc(f2, 512, scope='enc_fc3', activation_fn=tf.nn.elu, weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3, self.n_z, scope='enc_fc4_sigma', activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq), mean=0, stddev=1, dtype=tf.float32)
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z -> x_hat
g0 = fc(self.z, 512 , scope='dec_fc0', activation_fn=tf.nn.elu , weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
g1 = fc(g0, 1048, scope='dec_fc1', activation_fn=tf.nn.elu , weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
g2 = fc(g1, 2048, scope='dec_fc2', activation_fn=tf.nn.elu , weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
g3 = fc(g2, 4096, scope='dec_fc3', activation_fn=tf.nn.elu , weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
self.x_hat = fc(g3, input_dim, scope='dec_fc4', activation_fn=tf.sigmoid, weights_initializer=tf.truncated_normal_initializer(stddev=0.01),weights_regularizer=slim.l2_regularizer(0.05))
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-10
recon_loss = -tf.reduce_sum(self.x * tf.log(epsilon+self.x_hat) + (1-self.x) * tf.log(epsilon+1-self.x_hat), axis=1)
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(self.z_mu) - tf.exp(self.z_log_sigma_sq), axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(recon_loss + latent_loss)
self.train_op = tf.train.AdamOptimizer(learning_rate=self.learning_rate).minimize(self.total_loss)
return
def build(self):
self.x = tf.placeholder(name='x',
dtype=tf.float32,
shape=[None, self.vindim])
# Encode
# x -> z_mean, z_sigma -> z
f0 = fc(self.x, 30000, scope='enc_fc0', activation_fn=tf.nn.relu)
f1 = fc(f0, 15000, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 10000, scope='enc_fc2', activation_fn=tf.nn.relu)
f3 = fc(f2, 2000, scope='enc_fc3', activation_fn=tf.nn.relu)
#f3 = fc(f3, 500, scope='enc_fc3', activation_fn=tf.nn.elu)
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3,
self.n_z,
scope='enc_fc4_sigma',
activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0,
stddev=1,
dtype=tf.float32)
#zzz = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
#self.zzz = tf.Print(zzz,[zzz], message="my Z-values:")
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z -> x_hat
g1 = fc(self.z, 2000, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 10000, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 15000, scope='dec_fc3', activation_fn=tf.nn.relu)
g4 = fc(g3, 30000, scope='dec_fc4', activation_fn=tf.nn.relu)
self.x_hat = fc(g4,
self.vindim,
scope='dec_fc5',
activation_fn=tf.sigmoid)
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-9
recon_loss = -tf.reduce_sum(self.x * tf.log(epsilon + self.x_hat) +
(1 - self.x) * tf.log(epsilon +
(1 - self.x_hat)),
axis=1)
#recon_loss = tf.reduce_sum((self.x_hat-self.x)**2,axis=1)
#recon_loss = tf.nn.l2_loss(self.x_hat-self.x)
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(1 + self.z_log_sigma_sq - tf.square(
self.z_mu) - tf.exp(self.z_log_sigma_sq),
axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(latent_loss + recon_loss)
self.train_op = tf.train.RMSPropOptimizer(
learning_rate=self.learning_rate).minimize(self.total_loss)
#self.train_op = tf.train.AdamOptimizer(
# learning_rate=self.learning_rate).minimize(self.total_loss)
return
def build(self, input_tensor=None, loss_type='CE', use_conv=False, sphere_lat=True, crop=-1, alpha_r=3):
self.input = tf.placeholder(
dtype=tf.float32, shape=[None, self.h, self.w, 1], name="input_")
self.label = tf.placeholder(dtype=tf.int32, shape=[None,], name="label_")
print(self.input.name)
if crop > 0:
crops = [tf.random_crop(self.input, size=(self.batch_size, 16,72,1),
seed=None, name="crop_{0:d}".format(ci)) for ci in range(crop)]
self.input_ = tf.concat(crops, axis=0, name="input_crop")
self.x = tf.layers.flatten(self.input_, name='x')
self.input_dim = 16*72
else:
self.x = tf.layers.flatten(self.input, name='x')
# Encode
# x -> z_mean, z_sigma -> z
for var in tf.global_variables():
print(var.name, var.get_shape())
if use_conv:
if crop > 0:
f1 = conv2d(self.input_, num_outputs=32, kernel_size=[3,3])
else:
f1 = conv2d(self.input, num_outputs=32, kernel_size=[3,3])
m1 = max_pool2d(f1, kernel_size=[1,2], stride=[1,2])
f2 = conv2d(m1, num_outputs=64, kernel_size=[3,3])
m2 = max_pool2d(f2, kernel_size=2, stride=2)
f3 = conv2d(m2, num_outputs=128, kernel_size=[3,3])
m3 = max_pool2d(f3, kernel_size=[1,2], stride=[1,2])
f4 = conv2d(m3, num_outputs=256, kernel_size=[3,3])
m4 = max_pool2d(f4, kernel_size=2, stride=2)
f5 = conv2d(m4, num_outputs=128, kernel_size=[3,3])
m5 = max_pool2d(f5, kernel_size=2, stride=2)
f6 = conv2d(m5, num_outputs=256, kernel_size=[3,3])
#m6 = max_pool2d(f6, kernel_size=2, stride=2)
#f7 = conv2d(m5, num_outputs=256, kernel_size=[3,3])
ff = tf.reduce_mean(f6, axis=(1,2))
else:
f1 = fc(self.x, 512, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 256, scope='enc_fc2', activation_fn=tf.nn.relu)
ff = fc(f2, 128, scope='enc_fc3', activation_fn=tf.nn.relu)
z = fc(ff, self.n_z, scope='enc_fc4', activation_fn=None)
if sphere_lat:
norm = tf.sqrt(tf.reduce_sum(z*z,1, keepdims=True))
self.z = tf.div(z, norm, name='enc_norm')
else:
self.z = z
print(self.z.name)
if crop > 0:
z1 = tf.reshape(self.z, (1, crop, self.batch_size, -1))
z2 = tf.reshape(self.z, (crop, 1, self.batch_size, -1))
zloss = tf.reduce_mean(1-tf.reduce_sum(z1*z2, axis=-1), name='zloss') * 0.1
else:
zloss, pos_frac = batch_all_triplet_loss(self.label, self.z, margin=0.1, squared=False)
#zloss = zloss * 0.
#tf.constant(0, dtype=tf.float32)
# Decode
# z -> x_hat
g1 = fc(self.z, 128, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 256, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 512, scope='dec_fc3', activation_fn=tf.nn.relu)
self.x_hat = fc(g3, self.input_dim, scope='dec_fc4',
activation_fn=tf.sigmoid)
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-10
if loss_type == 'CE':
self.recon_loss = -tf.reduce_sum(
self.x * tf.log(epsilon+self.x_hat) +
(1-self.x) * tf.log(epsilon+1-self.x_hat),
axis=1
) * alpha_r
elif loss_type == 'l2':
self.recon_loss = tf.sqrt(tf.reduce_mean(
tf.square(self.x -self.x_hat),
axis=1
)) * alpha_r
elif loss_type == 'l1':
self.recon_loss = tf.reduce_mean(
tf.abs(self.x -self.x_hat),
axis=1
) * alpha_r
# self.target_loss = -tf.reduce_sum(
# self.x * tf.log(epsilon+self.x) +
# (1-self.x) * tf.log(epsilon+1-self.x),
# axis=1
# )
recon_loss = tf.reduce_mean(self.recon_loss)
self.train_op = tf.train.AdamOptimizer(
learning_rate=self.learning_rate).minimize(recon_loss+zloss)
self.losses = {
'recon_loss': recon_loss,
'zloss': zloss
}
return
