def grad_fn(inputs, variables, unused_outputs, unused_grad_outputs):
grad_inputs = [tf.ones_like(t) * (i + 1.) for i, t in enumerate(inputs)]
grad_vars = [
tf.ones_like(t) * (i + len(inputs) + 1.)
for i, t in enumerate(variables)
]
return grad_inputs, grad_vars
def generalised_dice_loss(prediction,
ground_truth,
weight_map=None,
type_weight='Square'):
"""
Function to calculate the Generalised Dice Loss defined in
Sudre, C. et. al. (2017) Generalised Dice overlap as a deep learning
loss function for highly unbalanced segmentations. DLMIA 2017
:param prediction: the logits
:param ground_truth: the segmentation ground truth
:param weight_map:
:param type_weight: type of weighting allowed between labels (choice
between Square (square of inverse of volume),
Simple (inverse of volume) and Uniform (no weighting))
:return: the loss
"""
ground_truth = tf.to_int64(ground_truth)
n_voxels = ground_truth.shape[0].value
n_classes = prediction.shape[1].value
ids = tf.constant(np.arange(n_voxels), dtype=tf.int64)
ids = tf.stack([ids, ground_truth], axis=1)
one_hot = tf.SparseTensor(indices=ids,
values=tf.ones([n_voxels], dtype=tf.float32),
dense_shape=[n_voxels, n_classes])
if weight_map is not None:
weight_map_nclasses = tf.reshape(
tf.tile(weight_map, [n_classes]), prediction.get_shape())
ref_vol = tf.sparse_reduce_sum(
weight_map_nclasses * one_hot, reduction_axes=[0])
intersect = tf.sparse_reduce_sum(
weight_map_nclasses * one_hot * prediction, reduction_axes=[0])
seg_vol = tf.reduce_sum(
tf.multiply(weight_map_nclasses, prediction), 0)
else:
ref_vol = tf.sparse_reduce_sum(one_hot, reduction_axes=[0])
intersect = tf.sparse_reduce_sum(one_hot * prediction,
reduction_axes=[0])
seg_vol = tf.reduce_sum(prediction, 0)
if type_weight == 'Square':
weights = tf.reciprocal(tf.square(ref_vol))
elif type_weight == 'Simple':
weights = tf.reciprocal(ref_vol)
elif type_weight == 'Uniform':
weights = tf.ones_like(ref_vol)
else:
raise ValueError("The variable type_weight \"{}\""
"is not defined.".format(type_weight))
new_weights = tf.where(tf.is_inf(weights), tf.zeros_like(weights), weights)
weights = tf.where(tf.is_inf(weights), tf.ones_like(weights) *
tf.reduce_max(new_weights), weights)
generalised_dice_numerator = \
2 * tf.reduce_sum(tf.multiply(weights, intersect))
generalised_dice_denominator = \
tf.reduce_sum(tf.multiply(weights, seg_vol + ref_vol))
generalised_dice_score = \
generalised_dice_numerator / generalised_dice_denominator
return 1 - generalised_dice_score
def __init__(self,
sess,
dataset_name='facades',
checkpoint_dir=None):
self.sess = sess
self.dataset_name = dataset_name
self.checkpoint_dir = checkpoint_dir
self.real_data = tf.placeholder(tf.float32,
[BATCH_SIZE, IMAGE_SIZE, IMAGE_SIZE, 3 + 3],
name='input_images')
self.real_A = self.real_data[:, :, :, :3]
self.real_B = self.real_data[:, :, :, 3:6]
self.fake_B = generator(self.real_A, name="generatorA2B")
self.fake_A = generator(self.real_B, name="generatorB2A")
self.fake_B_fake_A = generator(self.fake_B, reuse=True, name="generatorB2A")
self.fake_A_fake_B = generator(self.fake_A, reuse=True, name="generatorA2B")
self.DA_real = discriminator(self.real_A, reuse=False, name="descriminatorA")
self.DB_real = discriminator(self.real_B, reuse=False, name="descriminatorB")
self.DA_fake = discriminator(self.fake_A, reuse=True, name="descriminatorA")
self.DB_fake = discriminator(self.fake_B, reuse=True, name="descriminatorB")
self.g_loss_a2b = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DB_fake, labels=tf.ones_like(self.DB_fake))) + 100 * tf.reduce_mean(
tf.abs(self.real_A - self.fake_B_fake_A)) + 100 * tf.reduce_mean(
tf.abs(self.real_B - self.fake_B))
self.g_loss_b2a = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DA_fake, labels=tf.ones_like(self.DA_fake))) + 100 * tf.reduce_mean(
tf.abs(self.real_B - self.fake_A_fake_B)) + 100 * tf.reduce_mean(
tf.abs(self.real_A - self.fake_A))
self.g_loss = self.g_loss_a2b + self.g_loss_b2a
self.d_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DB_fake, labels=tf.zeros_like(self.DB_fake))) + tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DB_real, labels=tf.ones_like(self.DB_real))) + tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DA_fake, labels=tf.zeros_like(self.DA_fake))) + tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.DA_real, labels=tf.ones_like(self.DA_real)))
self.d_loss_sum = tf.summary.scalar("d_loss", self.d_loss)
self.g_loss_sum = tf.summary.scalar("g_loss", self.g_loss)
self.g_loss_a2b_sum = tf.summary.scalar("g_loss_a2b", self.g_loss_a2b)
self.g_loss_b2a_sum = tf.summary.scalar("g_loss_b2a", self.g_loss_b2a)
self.real_A_sum = tf.summary.image("real_A", self.real_A)
self.real_B_sum = tf.summary.image("real_B", self.real_B)
self.fake_A_sum = tf.summary.image("fake_A", self.fake_A)
self.fake_B_sum = tf.summary.image("fake_B", self.fake_B)
self.fake_AB_sum = tf.summary.image("fake_AB", self.fake_A_fake_B)
self.fake_BA_sum = tf.summary.image("fake_BA", self.fake_B_fake_A)
self.d_sum = tf.summary.merge([self.d_loss_sum])
self.g_sum = tf.summary.merge([self.g_loss_sum, self.g_loss_a2b_sum, self.g_loss_b2a_sum,
self.real_A_sum, self.real_B_sum, self.fake_A_sum,
self.fake_B_sum, self.fake_AB_sum, self.fake_BA_sum])
training_vars = tf.trainable_variables()
self.d_vars = [var for var in training_vars if 'd_' in var.name]
self.g_vars = [var for var in training_vars if 'g_' in var.name]
self.saver = tf.train.Saver(max_to_keep=5)
def __init__(self, q_values, observations, num_actions, stochastic, eps,
softmax, softmax_temp):
if softmax:
action_dist = Categorical(q_values / softmax_temp)
self.action = action_dist.sample()
self.action_prob = action_dist.sampled_action_prob()
return
deterministic_actions = tf.argmax(q_values, axis=1)
batch_size = tf.shape(observations)[0]
# Special case masked out actions (q_value ~= -inf) so that we don't
# even consider them for exploration.
random_valid_action_logits = tf.where(
tf.equal(q_values, tf.float32.min),
tf.ones_like(q_values) * tf.float32.min, tf.ones_like(q_values))
random_actions = tf.squeeze(
tf.multinomial(random_valid_action_logits, 1), axis=1)
chose_random = tf.random_uniform(
tf.stack([batch_size]), minval=0, maxval=1, dtype=tf.float32) < eps
stochastic_actions = tf.where(chose_random, random_actions,
deterministic_actions)
self.action = tf.cond(stochastic, lambda: stochastic_actions,
lambda: deterministic_actions)
self.action_prob = None
def create_model(self):
"""Create tensorflow variables and graph."""
self.enc_inp = [tf.placeholder(tf.int32, shape=(None,),
name="inp%i" % t)
for t in range(self.bucket[0])]
self.labels = [tf.placeholder(tf.int32, shape=(None,),
name="labels%i" % t)
for t in range(self.bucket[1])]
self.weights = [tf.ones_like(labels_t, dtype=tf.float32)
for labels_t in self.labels]
# Decoder input: prepend some "GO" token and drop the final
# token of the encoder input
self.dec_inp = ([GO_ID * tf.ones_like(self.labels[0], dtype=np.int32,
name="GO")] + self.labels[:-1])
single_cell = tf.nn.rnn_cell.LSTMCell(self.memory_dim)
if self.num_layers > 1:
self.cell = tf.nn.rnn_cell.MultiRNNCell(
[single_cell] * self.num_layers)
else:
self.cell = single_cell
# Sequence to sequence model
self.dec_outputs, self.dec_memory = tf.nn.seq2seq.embedding_rnn_seq2seq(
self.enc_inp, self.dec_inp, self.cell, len(self.en_chars),
len(self.hi_chars), self.embedding_dim)
def add_optimization(learning_rate, beta1, beta2, disc_gen, disc_true,
gen_label, disc_label):
gen_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
disc_gen, tf.ones_like(disc_gen)), name='gen_loss')
disc_g_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
disc_gen, tf.zeros_like(disc_gen)))
disc_x_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
disc_true, tf.ones_like(disc_true)))
disc_loss = tf.add(disc_g_loss, disc_x_loss, name='disc_loss')
gen_vars = tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES,
scope=gen_label)
disc_vars = tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES,
scope=disc_label)
# print 'gen vars---------------------'
# for v in gen_vars:
# print v.name
# print 'disc vars----------------'
# for v in disc_vars:
# print v.name
gen_opt = tf.train.AdamOptimizer(learning_rate=learning_rate,
beta1=beta1,
beta2=beta2).minimize(gen_loss,
var_list=gen_vars)
disc_opt = tf.train.AdamOptimizer(learning_rate=learning_rate,
beta1=beta1,
beta2=beta2).minimize(disc_loss,
var_list=disc_vars)
return gen_loss, disc_loss, gen_opt, disc_opt
def compute_losses(self, images, wrong_images, fake_images, embeddings):
real_logit = self.model.get_discriminator(images, embeddings)
wrong_logit = self.model.get_discriminator(wrong_images, embeddings)
fake_logit = self.model.get_discriminator(fake_images, embeddings)
real_d_loss =\
tf.nn.sigmoid_cross_entropy_with_logits(real_logit,
tf.ones_like(real_logit))
real_d_loss = tf.reduce_mean(real_d_loss)
wrong_d_loss =\
tf.nn.sigmoid_cross_entropy_with_logits(wrong_logit,
tf.zeros_like(wrong_logit))
wrong_d_loss = tf.reduce_mean(wrong_d_loss)
fake_d_loss =\
tf.nn.sigmoid_cross_entropy_with_logits(fake_logit,
tf.zeros_like(fake_logit))
fake_d_loss = tf.reduce_mean(fake_d_loss)
if cfg.TRAIN.B_WRONG:
discriminator_loss =\
real_d_loss + (wrong_d_loss + fake_d_loss) / 2.
self.log_vars.append(("d_loss_wrong", wrong_d_loss))
else:
discriminator_loss = real_d_loss + fake_d_loss
self.log_vars.append(("d_loss_real", real_d_loss))
self.log_vars.append(("d_loss_fake", fake_d_loss))
generator_loss = \
tf.nn.sigmoid_cross_entropy_with_logits(fake_logit,
tf.ones_like(fake_logit))
generator_loss = tf.reduce_mean(generator_loss)
return discriminator_loss, generator_loss
def add_dyprune(weights):
crate = config.crate[weights.name[:-2]] #hyperpara C rate
prune_mask = tf.Variable(tf.ones_like(weights),name=weights.name[:-2]+'mask', trainable=False)
#calculate mask
mean = tf.divide(tf.reduce_sum(tf.multiply(tf.abs(weights),prune_mask)),tf.reduce_sum(prune_mask))
var = tf.multiply(weights,prune_mask)
var = tf.square(var)
mean_q = tf.square(mean)*tf.reduce_sum(prune_mask)
var = tf.reduce_sum(var) - mean_q
var = tf.divide(var,tf.reduce_sum(prune_mask))
var = tf.sqrt(var)
t1_lower = (mean+var*crate)*0.25 #hyperpara a
t1_upper = (mean+var*crate)*0.45 #hyperpara b
indicator_lower1 = tf.greater_equal(tf.abs(weights), tf.ones_like(weights) * t1_lower)
indicator_upper1 = tf.greater_equal(tf.abs(weights), tf.ones_like(weights) * t1_upper)
indicator_matrix1 = tf.greater_equal(prune_mask, tf.zeros_like(weights))
indicator_matrix1 = tf.logical_and(indicator_matrix1,indicator_lower1)
indicator_matrix1 = tf.logical_or(indicator_matrix1,indicator_upper1)
indicator_matrix1 = tf.to_float(indicator_matrix1)
update = prune_mask.assign(indicator_matrix1)
prune_fc = tf.multiply(weights, prune_mask)
return prune_fc
def p_zt(self, prev_state, t):
"""Computes the model p(z_t| z_{t-1})."""
batch_size = tf.shape(prev_state)[0]
if t > 0:
z_mu_p = prev_state + self.bs[t - 1]
p_zt = tf.contrib.distributions.Normal(
loc=z_mu_p, scale=tf.sqrt(tf.ones_like(z_mu_p) * self.variance))
return p_zt
else: # p(z_0) is mixture of two Normals
mu_pos = tf.ones([batch_size, self.state_size], dtype=self.dtype) * self.prior_mode_mean
mu_neg = tf.ones([batch_size, self.state_size], dtype=self.dtype) * -self.prior_mode_mean
z0_pos = tf.contrib.distributions.Normal(
loc=mu_pos,
scale=tf.sqrt(tf.ones_like(mu_pos) * self.variance))
z0_neg = tf.contrib.distributions.Normal(
loc=mu_neg,
scale=tf.sqrt(tf.ones_like(mu_neg) * self.variance))
mode_probs = tf.convert_to_tensor([self.mixing_coeff, 1-self.mixing_coeff], dtype=tf.float64)
mode_probs = tf.tile(mode_probs[tf.newaxis, tf.newaxis, :], [batch_size, 1, 1])
mode_selection_dist = tf.contrib.distributions.Categorical(probs=mode_probs)
z0_dist = tf.contrib.distributions.Mixture(
cat=mode_selection_dist,
components=[z0_pos, z0_neg],
validate_args=False)
return z0_dist
def build_model(self):
if self.y_dim:
self.y= tf.placeholder(tf.float32, [None, self.y_dim], name='y')
self.images = tf.placeholder(tf.float32, [self.batch_size] + self.image_shape,
name='real_images')
self.sample_images= tf.placeholder(tf.float32, [self.sample_size] + self.image_shape,
name='sample_images')
self.z = tf.placeholder(tf.float32, [None, self.z_dim],
name='z')
self.G = self.generator(self.z)
self.D = self.discriminator(self.images)
self.sampler = self.sampler(self.z)
self.D_ = self.discriminator(self.G, reuse=True)
self.d_loss_real = binary_cross_entropy_with_logits(tf.ones_like(self.D), self.D)
self.d_loss_fake = binary_cross_entropy_with_logits(tf.zeros_like(self.D_), self.D_)
self.g_loss = binary_cross_entropy_with_logits(tf.ones_like(self.D_), self.D_)
self.d_loss = self.d_loss_real + self.d_loss_fake
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
self.saver = tf.train.Saver()
def prune_outside_window(keypoints, window, scope=None):
"""Prunes keypoints that fall outside a given window.
This function replaces keypoints that fall outside the given window with nan.
See also clip_to_window which clips any keypoints that fall outside the given
window.
Args:
keypoints: a tensor of shape [num_instances, num_keypoints, 2]
window: a tensor of shape [4] representing the [y_min, x_min, y_max, x_max]
window outside of which the op should prune the keypoints.
scope: name scope.
Returns:
new_keypoints: a tensor of shape [num_instances, num_keypoints, 2]
"""
with tf.name_scope(scope, 'PruneOutsideWindow'):
y, x = tf.split(value=keypoints, num_or_size_splits=2, axis=2)
win_y_min, win_x_min, win_y_max, win_x_max = tf.unstack(window)
valid_indices = tf.logical_and(
tf.logical_and(y >= win_y_min, y <= win_y_max),
tf.logical_and(x >= win_x_min, x <= win_x_max))
new_y = tf.where(valid_indices, y, np.nan * tf.ones_like(y))
new_x = tf.where(valid_indices, x, np.nan * tf.ones_like(x))
new_keypoints = tf.concat([new_y, new_x], 2)
return new_keypoints
def __init__(self,
sess,
batch_size=32,
image_size=256,
lam=0.8,
checkpoint_dir=None):
self.sess = sess
self.batch_size = batch_size
self.image_size = image_size
self.image_shape = [image_size, image_size, 3]
self.lam = lam
self.checkpoint_dir = checkpoint_dir
self.global_step = tf.Variable(0, trainable=False)
self.images = tf.placeholder(tf.float32, [batch_size] + self.image_shape, name='images')
self.images_summary = tf.summary.image("image", self.images)
self.d_bns = [batch_norm(name='d_bn{}'.format(i)) for i in range(5)]
self.local_d_bns = [batch_norm(name='d_local_bn{}'.format(i)) for i in range(4)]
self.g_bns = [batch_norm(name='g_bn{}'.format(i, )) for i in range(15)]
self.D, self.D_logits = self.discriminator(self.images, self.image_size)
self.d_loss_real = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_logits, labels=tf.ones_like(self.D)))
self.D_summary = tf.summary.histogram("d", self.D)
self.d_loss_real_summary = tf.summary.scalar("d_loss_real", self.d_loss_real)
self.masks = tf.placeholder(tf.float32, [batch_size] + self.image_shape, name='masks')
self.MG = tf.multiply(self.images, self.masks)
self.G = self.generator(self.MG)
self.MG_summary = tf.summary.image("mg", self.MG)
self.G_summary = tf.summary.image("g", self.G)
self.D_fake, self.D_fake_logits = self.discriminator(self.G, self.image_size, reuse=True)
self.d_loss_fake = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_fake_logits, labels=tf.zeros_like(self.D_fake)))
self.D_fake_summary = tf.summary.histogram("d_fake", self.D_fake)
self.d_loss_fake_summary = tf.summary.scalar("d_loss_fake", self.d_loss_fake)
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss_d = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_fake_logits, labels=tf.ones_like(self.D_fake)))
self.g_loss_l = tf.reduce_mean(tf.contrib.layers.flatten(
tf.multiply(self.G - self.images, self.G - self.images)))
self.g_loss = (1 - self.lam) * self.g_loss_d + self.lam * self.g_loss_l
self.g_loss_d_summary = tf.summary.scalar("g_loss_d", self.g_loss_d)
self.g_loss_l_summary = tf.summary.scalar("g_loss_l", self.g_loss_l)
self.g_loss_summary = tf.summary.scalar("g_loss", self.g_loss)
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
self.saver = tf.train.Saver(max_to_keep=10)
self.g_summary = tf.summary.merge([
self.G_summary, self.MG_summary, self.D_fake_summary, self.d_loss_fake_summary,
self.g_loss_summary, self.g_loss_d_summary, self.g_loss_l_summary])
self.d_summary = tf.summary.merge([
self.images_summary, self.D_summary, self.d_loss_real_summary])
self.writer = tf.summary.FileWriter(os.path.join(self.checkpoint_dir, "logs"), self.sess.graph)
def build_loss_and_gradients(self, var_list):
x_true = list(six.itervalues(self.data))[0]
x_fake = list(six.iterkeys(self.data))[0]
with tf.variable_scope("Disc"):
d_true = self.discriminator(x_true)
with tf.variable_scope("Disc", reuse=True):
d_fake = self.discriminator(x_fake)
if self.logging:
tf.summary.histogram("discriminator_outputs",
tf.concat([d_true, d_fake], axis=0),
collections=[self._summary_key])
loss_d = tf.nn.sigmoid_cross_entropy_with_logits(
labels=tf.ones_like(d_true), logits=d_true) + \
tf.nn.sigmoid_cross_entropy_with_logits(
labels=tf.zeros_like(d_fake), logits=d_fake)
loss = tf.nn.sigmoid_cross_entropy_with_logits(
labels=tf.ones_like(d_fake), logits=d_fake)
loss_d = tf.reduce_mean(loss_d)
loss = tf.reduce_mean(loss)
var_list_d = tf.get_collection(
tf.GraphKeys.TRAINABLE_VARIABLES, scope="Disc")
if var_list is None:
var_list = [v for v in tf.trainable_variables() if v not in var_list_d]
grads_d = tf.gradients(loss_d, var_list_d)
grads = tf.gradients(loss, var_list)
grads_and_vars_d = list(zip(grads_d, var_list_d))
grads_and_vars = list(zip(grads, var_list))
return loss, grads_and_vars, loss_d, grads_and_vars_d
def _sample_n(self, n, seed=None):
n_draws = tf.cast(self.total_count, dtype=tf.int32)
k = self.event_shape_tensor()[0]
# broadcast the total_count and logits to same shape
n_draws = tf.ones_like(
self.logits[..., 0], dtype=n_draws.dtype) * n_draws
logits = tf.ones_like(
n_draws[..., tf.newaxis], dtype=self.logits.dtype) * self.logits
# flatten the total_count and logits
flat_logits = tf.reshape(logits, [-1, k]) # [B1B2...Bm, k]
flat_ndraws = n * tf.reshape(n_draws, [-1]) # [B1B2...Bm]
# computes each total_count and logits situation by map_fn
def _sample_single(args):
logits, n_draw = args[0], args[1] # [K], []
x = tf.multinomial(logits[tf.newaxis, ...], n_draw,
seed) # [1, n*n_draw]
x = tf.reshape(x, shape=[n, -1]) # [n, n_draw]
x = tf.reduce_sum(tf.one_hot(x, depth=k), axis=-2) # [n, k]
return x
x = tf.map_fn(
_sample_single, [flat_logits, flat_ndraws],
dtype=self.dtype) # [B1B2...Bm, n, k]
# reshape the results to proper shape
x = tf.transpose(x, perm=[1, 0, 2])
final_shape = tf.concat([[n], self.batch_shape_tensor(), [k]], 0)
x = tf.reshape(x, final_shape) # [n, B1, B2,..., Bm, k]
return x
def build_losses(self, logits_real, logits_fake):
"""D and G play two-player minimax game with value function V(G,D)
min_G max _D V(D, G) = IE_{x ~ p_data} [log D(x)] + IE_{z ~ p_fake} [log (1 - D(G(z)))]
Args:
logits_real (tf.Tensor): discrim logits from real samples
logits_fake (tf.Tensor): discrim logits from fake samples produced by generator
"""
with tf.name_scope("GAN_loss"):
score_real = tf.sigmoid(logits_real)
score_fake = tf.sigmoid(logits_fake)
tf.summary.histogram('score-real', score_real)
tf.summary.histogram('score-fake', score_fake)
with tf.name_scope("discrim"):
d_loss_pos = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=logits_real, labels=tf.ones_like(logits_real)), name='loss_real')
d_loss_neg = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=logits_fake, labels=tf.zeros_like(logits_fake)), name='loss_fake')
d_pos_acc = tf.reduce_mean(tf.cast(score_real > 0.5, tf.float32), name='accuracy_real')
d_neg_acc = tf.reduce_mean(tf.cast(score_fake < 0.5, tf.float32), name='accuracy_fake')
d_accuracy = tf.add(.5 * d_pos_acc, .5 * d_neg_acc, name='accuracy')
self.d_loss = tf.add(.5 * d_loss_pos, .5 * d_loss_neg, name='loss')
with tf.name_scope("gen"):
self.g_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=logits_fake, labels=tf.ones_like(logits_fake)), name='loss')
g_accuracy = tf.reduce_mean(tf.cast(score_fake > 0.5, tf.float32), name='accuracy')
add_moving_summary(self.g_loss, self.d_loss, d_accuracy, g_accuracy)
def build_model(self):
self.is_training = tf.placeholder(tf.bool, name='is_training')
self.images = tf.placeholder(
tf.float32, [None] + self.image_shape, name='real_images')
self.lowres_images = tf.reduce_mean(tf.reshape(self.images,
[self.batch_size, self.lowres_size, self.lowres,
self.lowres_size, self.lowres, self.c_dim]), [2, 4])
self.z = tf.placeholder(tf.float32, [None, self.z_dim], name='z')
self.z_sum = tf.summary.histogram("z", self.z)
self.G = self.generator(self.z)
self.lowres_G = tf.reduce_mean(tf.reshape(self.G,
[self.batch_size, self.lowres_size, self.lowres,
self.lowres_size, self.lowres, self.c_dim]), [2, 4])
self.D, self.D_logits = self.discriminator(self.images)
self.D_, self.D_logits_ = self.discriminator(self.G, reuse=True)
self.d_sum = tf.summary.histogram("d", self.D)
self.d__sum = tf.summary.histogram("d_", self.D_)
self.G_sum = tf.summary.image("G", self.G)
self.d_loss_real = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits,
labels=tf.ones_like(self.D)))
self.d_loss_fake = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits_,
labels=tf.zeros_like(self.D_)))
self.g_loss = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits_,
labels=tf.ones_like(self.D_)))
self.d_loss_real_sum = tf.summary.scalar("d_loss_real", self.d_loss_real)
self.d_loss_fake_sum = tf.summary.scalar("d_loss_fake", self.d_loss_fake)
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss_sum = tf.summary.scalar("g_loss", self.g_loss)
self.d_loss_sum = tf.summary.scalar("d_loss", self.d_loss)
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
self.saver = tf.train.Saver(max_to_keep=1)
# Completion.
self.mask = tf.placeholder(tf.float32, self.image_shape, name='mask')
self.lowres_mask = tf.placeholder(tf.float32, self.lowres_shape, name='lowres_mask')
self.contextual_loss = tf.reduce_sum(
tf.contrib.layers.flatten(
tf.abs(tf.multiply(self.mask, self.G) - tf.multiply(self.mask, self.images))), 1)
self.contextual_loss += tf.reduce_sum(
tf.contrib.layers.flatten(
tf.abs(tf.multiply(self.lowres_mask, self.lowres_G) - tf.multiply(self.lowres_mask, self.lowres_images))), 1)
self.perceptual_loss = self.g_loss
self.complete_loss = self.contextual_loss + self.lam*self.perceptual_loss
self.grad_complete_loss = tf.gradients(self.complete_loss, self.z)
def build_model(self):
# some parameters
image_dims = [self.input_height, self.input_width, self.c_dim]
bs = self.batch_size
""" Graph Input """
# images
self.inputs = tf.placeholder(tf.float32, [bs] + image_dims, name='real_images')
# noises
self.z = tf.placeholder(tf.float32, [bs, self.z_dim], name='z')
""" Loss Function """
# output of D for real images
D_real, D_real_logits, _ = self.discriminator(self.inputs, is_training=True, reuse=False)
# output of D for fake images
G = self.generator(self.z, is_training=True, reuse=False)
D_fake, D_fake_logits, _ = self.discriminator(G, is_training=True, reuse=True)
# get loss for discriminator
d_loss_real = tf.reduce_mean(self.mse_loss(D_real_logits, tf.ones_like(D_real_logits)))
d_loss_fake = tf.reduce_mean(self.mse_loss(D_fake_logits, tf.zeros_like(D_fake_logits)))
self.d_loss = 0.5*(d_loss_real + d_loss_fake)
# get loss for generator
self.g_loss = tf.reduce_mean(self.mse_loss(D_fake_logits, tf.ones_like(D_fake_logits)))
""" Training """
# divide trainable variables into a group for D and a group for G
t_vars = tf.trainable_variables()
d_vars = [var for var in t_vars if 'd_' in var.name]
g_vars = [var for var in t_vars if 'g_' in var.name]
# optimizers
with tf.control_dependencies(tf.get_collection(tf.GraphKeys.UPDATE_OPS)):
self.d_optim = tf.train.AdamOptimizer(self.learning_rate, beta1=self.beta1) \
.minimize(self.d_loss, var_list=d_vars)
self.g_optim = tf.train.AdamOptimizer(self.learning_rate*5, beta1=self.beta1) \
.minimize(self.g_loss, var_list=g_vars)
# weight clipping
self.clip_D = [p.assign(tf.clip_by_value(p, -0.01, 0.01)) for p in d_vars]
"""" Testing """
# for test
self.fake_images = self.generator(self.z, is_training=False, reuse=True)
""" Summary """
d_loss_real_sum = tf.summary.scalar("d_loss_real", d_loss_real)
d_loss_fake_sum = tf.summary.scalar("d_loss_fake", d_loss_fake)
d_loss_sum = tf.summary.scalar("d_loss", self.d_loss)
g_loss_sum = tf.summary.scalar("g_loss", self.g_loss)
# final summary operations
self.g_sum = tf.summary.merge([d_loss_fake_sum, g_loss_sum])
self.d_sum = tf.summary.merge([d_loss_real_sum, d_loss_sum])
def din_fcn_attention(query, facts, attention_size, mask, stag='null', mode='SUM', softmax_stag=1, time_major=False, return_alphas=False, forCnn=False):
if isinstance(facts, tuple):
# In case of Bi-RNN, concatenate the forward and the backward RNN
# outputs.
facts = tf.concat(facts, 2)
if len(facts.get_shape().as_list()) == 2:
facts = tf.expand_dims(facts, 1)
if time_major:
# (T,B,D) => (B,T,D)
facts = tf.array_ops.transpose(facts, [1, 0, 2])
# Trainable parameters
mask = tf.equal(mask, tf.ones_like(mask))
# D value - hidden size of the RNN layer
facts_size = facts.get_shape().as_list()[-1]
print("facts_size %s" % facts_size)
querry_size = query.get_shape().as_list()[-1]
print("querry_size %s" % querry_size)
#tf.truncated_normal_initializer(dtype=tf.float32, stddev=0.36, seed=3)
query = tf.layers.dense(
query, facts_size, activation=None, kernel_initializer=get_tf_initializer(), name='f1' + stag)
query = prelu(query, scope=stag)
queries = tf.tile(query, [1, tf.shape(facts)[1]])
queries = tf.reshape(queries, tf.shape(facts))
din_all = tf.concat(
[queries, facts, queries - facts, queries * facts], axis=-1)
d_layer_1_all = tf.layers.dense(
din_all, 80, activation=tf.nn.sigmoid, kernel_initializer=get_tf_initializer(), name='f1_att' + stag)
d_layer_2_all = tf.layers.dense(
d_layer_1_all, 40, activation=tf.nn.sigmoid, kernel_initializer=get_tf_initializer(), name='f2_att' + stag)
d_layer_3_all = tf.layers.dense(
d_layer_2_all, 1, activation=None, kernel_initializer=get_tf_initializer(), name='f3_att' + stag)
d_layer_3_all = tf.reshape(d_layer_3_all, [-1, 1, tf.shape(facts)[1]])
scores = d_layer_3_all
# Mask
# key_masks = tf.sequence_mask(facts_length, tf.shape(facts)[1]) # [B, T]
key_masks = tf.expand_dims(mask, 1) # [B, 1, T]
paddings = tf.ones_like(scores) * (-2 ** 32 + 1)
if not forCnn:
scores = tf.where(key_masks, scores, paddings) # [B, 1, T]
# Scale
# scores = scores / (facts.get_shape().as_list()[-1] ** 0.5)
# Activation
if softmax_stag:
scores = tf.nn.softmax(scores) # [B, 1, T]
# Weighted sum
if mode == 'SUM':
output = tf.matmul(scores, facts) # [B, 1, H]
# output = tf.reshape(output, [-1, tf.shape(facts)[-1]])
else:
scores = tf.reshape(scores, [-1, tf.shape(facts)[1]])
output = facts * tf.expand_dims(scores, -1)
output = tf.reshape(output, tf.shape(facts))
if return_alphas:
return output, scores
return output
def __loss__(self):
"""
Calculate loss
:return:
"""
# regularization ?
# self.d_loss_real = tf.reduce_mean(
# tf.nn.sigmoid_cross_entropy_with_logits(logits=self.predict_d_logits,
# labels=tf.ones_like(self.predict_d)))
self.d_loss_real = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d, targets=tf.ones_like(self.predict_d)))
tf.summary.scalar('d_loss_real', self.d_loss_real, collections='D')
# self.d_loss_fake = tf.reduce_mean(
# tf.nn.sigmoid_cross_entropy_with_logits(logits=self.predict_d_logits_for_g,
# labels=tf.zeros_like(self.predict_d_for_g)))
self.d_loss_fake = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d_for_g, targets=tf.zeros_like(self.predict_d_for_g)))
tf.summary.scalar('d_loss_fake', self.d_loss_fake, collections='D')
self.d_loss = self.d_loss_real + self.d_loss_fake
tf.summary.scalar('d_loss', self.d_loss, collections='D')
if len(self.regularization_values_d) > 0:
reg_loss_d = self.reg_w * tf.reduce_sum(self.regularization_values_d)
self.d_loss += reg_loss_d
tf.summary.scalar('d_loss_plus_reg', self.d_loss, collections='D')
tf.summary.scalar('d_loss_reg_only', reg_loss_d, collections='D')
# Generative loss
# g_loss = tf.reduce_mean(
# tf.nn.sigmoid_cross_entropy_with_logits(logits=self.predict_d_logits_for_g,
# labels=tf.ones_like(self.predict_d_for_g)))
g_loss = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d_for_g, targets=tf.ones_like(self.predict_d_for_g)))
tf.summary.scalar('g_loss', g_loss, collections='G')
context_loss = tf.reduce_mean(tf.square(tf.squeeze(self.predict_g) - self.labels), name='L2-Loss')
tf.summary.scalar('g_loss_context_only', context_loss, collections='G')
# print("from inside %f" % self.FLAGS.gen_loss_adversarial)
# self.g_loss = self.FLAGS.gen_loss_adversarial * g_loss + self.FLAGS.gen_loss_context * context_loss
self.g_loss = self.adb_loss_w * g_loss + self.FLAGS.gen_loss_context * context_loss
tf.summary.scalar('g_loss_plus_context', self.g_loss, collections='G')
if len(self.regularization_values) > 0:
reg_loss_g = self.reg_w * tf.reduce_sum(self.regularization_values)
self.g_loss += reg_loss_g
tf.summary.scalar('g_loss_plus_context_plus_reg', self.g_loss, collections='G')
tf.summary.scalar('g_loss_reg_only', reg_loss_g, collections='D')
tf.summary.scalar('diff-loss', tf.abs(self.d_loss - self.g_loss), collections='G')
def cross_entropy_op(pred, **kwargs):
if is_real:
target = (1. - softness) * tf.ones_like(pred)
else:
target = softness * tf.ones_like(pred)
entropy = tf.nn.sigmoid_cross_entropy_with_logits(logits=pred,
labels=target)
return tf.reduce_mean(entropy)
def scale(self, x): """Scale x from -0.5 - 0.5 to 0 - 255.""" x = tf.where(tf.is_nan(x), tf.ones_like(x), x) x = tf.where(tf.is_inf(x), tf.ones_like(x), x) x = tf.clip_by_value(x, -0.5, 0.5) x += 0.5 x = x * 2**self.hparams.n_bits_x return tf.cast(tf.clip_by_value(x, 0, 255), dtype=tf.uint8)
def loss_function(self, batch_logits, neg_logits):
batch_xent = tf.sigmoid_cross_entropy_with_logits(
batch_logits, tf.ones_like(batch_logits))
neg_xent = tf.sigmoid_cross_entropy_with_logits(
neg_logits, tf.ones_like(neg_logits))
nce_loss_tensor = (tf.reduce_sum(batch_logits) +
tf.reduce_sum(neg_logits)) / self.batch_size
return nce_loss_tensor
def _logistic_label(X, Y, rPos, rNeg):
# dist_to_center = tf.sqrt(tf.square(X) + tf.square(Y)) # L2 metric
dist_to_center = tf.abs(X) + tf.abs(Y) # Block metric
Z = tf.where(dist_to_center <= rPos,
tf.ones_like(X),
tf.where(dist_to_center < rNeg,
0.5 * tf.ones_like(X),
tf.zeros_like(X)))
return Z
def __init__(self,
z_dim, img_h, img_w, c_dim,
g_learning_rate, d_learning_rate,
g_beta1, d_beta1,
gf_dim=64, df_dim=64):
# initialize batch normalization
self.g_bn0 = batch_norm(name='g_bn0')
self.g_bn1 = batch_norm(name='g_bn1')
self.g_bn2 = batch_norm(name='g_bn2')
self.g_bn3 = batch_norm(name='g_bn3')
self.d_bn1 = batch_norm(name='d_bn1')
self.d_bn2 = batch_norm(name='d_bn2')
self.d_bn3 = batch_norm(name='d_bn3')
self.z_dim = z_dim
self.img_h = img_h
self.img_w = img_w
self.c_dim = c_dim
self.g_learning_rate = g_learning_rate
self.d_learning_rate = d_learning_rate
self.g_beta1 = g_beta1
self.d_beta1 = d_beta1
self.gf_dim = gf_dim
self.df_dim = df_dim
# set placeholder
self.z = tf.placeholder(tf.float32, shape=[None, self.z_dim], name='noise')
self.x = tf.placeholder(tf.float32, shape=[None, self.img_h, self.img_w, self.c_dim], name='real_data')
self.G = self.generator(self.z, reuse=False)
self.D_real, self.D_real_logits = self.discriminator(self.x, reuse=False)
self.D_fake, self.D_fake_logits = self.discriminator(self.G, reuse=True)
# calculate loss
self.d_loss_real = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_real_logits, labels=tf.ones_like(self.D_real)))
self.d_loss_fake = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_fake_logits, labels=tf.zeros_like(self.D_fake)))
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(
logits=self.D_fake_logits, labels=tf.ones_like(self.D_fake)))
# get trainable variables
var_list = tf.trainable_variables()
self.d_vars = [v for v in var_list if v.name.startswith('D/')]
self.g_vars = [v for v in var_list if v.name.startswith('G/')]
# set optimizer
self.d_opt = optimizer(self.d_loss, self.d_vars, self.d_learning_rate, self.d_beta1)
self.g_opt = optimizer(self.g_loss, self.g_vars, self.g_learning_rate, self.g_beta1)
# other tensors
self.saver = tf.train.Saver()
self.sampler = self.sampler(self.z)
self.d_features = self.features_discriminator(self.x)
def build_model(self):
if self.y_dim:
self.y = tf.placeholder(tf.float32, [self.batch_size, self.y_dim], name='y')
else:
self.y = None
if self.crop:
image_dims = [self.output_height, self.output_width, self.c_dim]
else:
image_dims = [self.input_height, self.input_width, self.c_dim]
self.inputs = tf.placeholder(
tf.float32, [self.batch_size] + image_dims, name='real_images')
inputs = self.inputs
self.z = tf.placeholder(
tf.float32, [None, self.z_dim], name='z')
self.z_sum = histogram_summary("z", self.z)
self.G = self.generator(self.z, self.y)
self.D, self.D_logits = self.discriminator(inputs, self.y, reuse=False)
self.sampler = self.sampler(self.z, self.y)
self.D_, self.D_logits_ = self.discriminator(self.G, self.y, reuse=True)
self.d_sum = histogram_summary("d", self.D)
self.d__sum = histogram_summary("d_", self.D_)
self.G_sum = image_summary("G", self.G)
def sigmoid_cross_entropy_with_logits(x, y):
try:
return tf.nn.sigmoid_cross_entropy_with_logits(logits=x, labels=y)
except:
return tf.nn.sigmoid_cross_entropy_with_logits(logits=x, targets=y)
self.d_loss_real = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits, tf.ones_like(self.D)))
self.d_loss_fake = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits_, tf.zeros_like(self.D_)))
self.g_loss = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits_, tf.ones_like(self.D_)))
self.d_loss_real_sum = scalar_summary("d_loss_real", self.d_loss_real)
self.d_loss_fake_sum = scalar_summary("d_loss_fake", self.d_loss_fake)
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss_sum = scalar_summary("g_loss", self.g_loss)
self.d_loss_sum = scalar_summary("d_loss", self.d_loss)
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
self.saver = tf.train.Saver()
def tf_F1_score(actuals, predictions):
actuals = tf.reshape(actuals, [-1, 1])
predictions = tf.reshape(predictions, [-1, 1])
ones_like_actuals = tf.ones_like(actuals)
zeros_like_actuals = tf.zeros_like(actuals)
ones_like_predictions = tf.ones_like(predictions)
zeros_like_predictions = tf.zeros_like(predictions)
#true-positive
tp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, ones_like_actuals),
tf.equal(predictions, ones_like_predictions)
),
dtype=tf.float32
)
)
#true-Negative
tn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, zeros_like_actuals),
tf.equal(predictions, zeros_like_predictions)
),
dtype=tf.float32
)
)
#false-positive
fp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, zeros_like_actuals),
tf.equal(predictions, ones_like_predictions)
),
dtype=tf.float32
)
)
#false_Neg
fn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, ones_like_actuals),
tf.equal(predictions, zeros_like_predictions)
),
dtype=tf.float32
)
)
accuracy = (tp_op + tn_op) / (tp_op + tn_op + fp_op + fn_op)
prediction = tp_op / (tp_op + fp_op)
recall = tp_op / (tp_op + fn_op)
f1_score = (2 * (prediction * recall)) / (prediction + recall)
return accuracy, [tp_op, tn_op, fp_op, fn_op, f1_score]
def _log_prob(self, x):
if self.validate_args:
x = distribution_util.embed_check_nonnegative_integer_form(x)
else:
# For consistency with cdf, we take the floor.
x = tf.floor(x)
x *= tf.ones_like(self.probs)
probs = self.probs * tf.ones_like(x)
safe_domain = tf.where(tf.equal(x, 0.), tf.zeros_like(probs), probs)
return x * tf.log1p(-safe_domain) + tf.log(probs)
def build_losses(self):
"""Builds the training losses.
Inputs:
self.predicted_distributions
Outputs:
self.batch_losses
self.total_loss
"""
autoregressive_target = self.autoregressive_input
# Quantize the target if the output distribution is categorical.
if self.hparams.output_distribution.type == "categorical":
min_val = self.hparams.output_distribution.min_quantization_value
max_val = self.hparams.output_distribution.max_quantization_value
num_classes = self.hparams.output_distribution.num_classes
clipped_target = tf.keras.backend.clip(autoregressive_target, min_val,
max_val)
quantized_target = tf.floor(
(clipped_target - min_val) / (max_val - min_val) * num_classes)
# Deal with the corner case where clipped_target equals max_val by mapping
# the label num_classes to num_classes - 1. Essentially, this makes the
# final quantized bucket a closed interval while all the other quantized
# buckets are half-open intervals.
quantized_target = tf.where(
quantized_target >= num_classes,
tf.ones_like(quantized_target) * (num_classes - 1), quantized_target)
autoregressive_target = quantized_target
log_prob = self.predicted_distributions.log_prob(autoregressive_target)
weights = self.weights
if weights is None:
weights = tf.ones_like(log_prob)
weights_dim = len(weights.shape)
per_example_weight = tf.reduce_sum(
weights, axis=list(range(1, weights_dim)))
per_example_indicator = tf.to_float(tf.greater(per_example_weight, 0))
num_examples = tf.reduce_sum(per_example_indicator)
batch_losses = -log_prob * weights
losses_ndims = batch_losses.shape.ndims
per_example_loss_sum = tf.reduce_sum(
batch_losses, axis=list(range(1, losses_ndims)))
per_example_loss = tf.where(per_example_weight > 0,
per_example_loss_sum / per_example_weight,
tf.zeros_like(per_example_weight))
total_loss = tf.reduce_sum(per_example_loss) / num_examples
self.autoregressive_target = autoregressive_target
self.batch_losses = batch_losses
self.per_example_loss = per_example_loss
self.num_nonzero_weight_examples = num_examples
self.total_loss = total_loss
def __loss__(self):
"""
Calculate loss
:return:
"""
with tf.variable_scope("discriminator") as scope:
self.d_loss_real = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d, targets=tf.ones_like(self.predict_d)))
tf.summary.scalar('d_loss_real', self.d_loss_real, collections='D')
scope.reuse_variables()
self.d_loss_fake = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d_for_g, targets=tf.zeros_like(self.predict_d_for_g)))
tf.summary.scalar('d_loss_fake', self.d_loss_fake, collections='D')
self.d_loss = self.d_loss_fake + self.d_loss_real
tf.summary.scalar('d_loss', self.d_loss, collections='D')
# if len(self.regularization_values_d) > 0:
# reg_loss_d = self.reg_w * tf.reduce_sum(self.regularization_values_d)
self.reg_loss_d = self.get_weights_regularization(dump=self.FLAGS.dump_debug, collection='D')
self.d_loss_no_reg = self.d_loss
self.d_loss += self.reg_loss_d
if self.FLAGS.dump_debug:
tf.summary.scalar('d_loss_plus_reg', self.d_loss, collections='D')
tf.summary.scalar('d_loss_reg_only', self.reg_loss_d, collections='D')
# Generative loss
g_loss = tf.reduce_mean(
ops.binary_cross_entropy(preds=self.predict_d_for_g, targets=tf.ones_like(self.predict_d_for_g)))
tf.summary.scalar('g_loss', g_loss, collections='G')
# Context loss L2
mask_not = tf.cast(tf.logical_not(tf.cast(self.labels['mask'], tf.bool)), tf.float32)
real_diff = tf.contrib.layers.flatten(tf.multiply(self.predict_g['real'] - self.labels['real'], mask_not))
imag_diff = tf.contrib.layers.flatten(tf.multiply(self.predict_g['imag'] - self.labels['imag'], mask_not))
self.context_loss = tf.reduce_mean(tf.square(real_diff) + tf.square(imag_diff), name='Context_loss_mean')
print("You are using L2 loss")
tf.summary.scalar('g_loss_context_only', self.context_loss, collections='G')
self.g_loss = self.adv_loss_w * g_loss + self.FLAGS.gen_loss_context * self.context_loss
# self.g_loss = self.FLAGS.gen_loss_adversarial * g_loss + self.FLAGS.gen_loss_context * context_loss
tf.summary.scalar('g_loss_plus_context', self.g_loss, collections='G')
# if len(self.regularization_values) > 0:
# reg_loss_g = self.reg_w * tf.reduce_sum(self.regularization_values)
self.reg_loss_g = self.get_weights_regularization(dump=self.FLAGS.dump_debug, collection='G')
self.g_loss_no_reg = self.g_loss
self.g_loss += self.reg_loss_g
if self.FLAGS.dump_debug:
tf.summary.scalar('g_loss_plus_context_plus_reg', self.g_loss, collections='G')
tf.summary.scalar('g_loss_reg_only', self.reg_loss_g, collections='D')
tf.summary.scalar('diff-loss', tf.abs(self.d_loss - self.g_loss), collections='G')
def sensitivity(logits, labels):
predictions = tf.argmax(logits, axis=-1)
actuals = tf.argmax(labels, axis=-1)
nodule_actuals = tf.ones_like(actuals)
non_nodule_actuals = tf.zeros_like(actuals)
nodule_predictions = tf.ones_like(predictions)
non_nodule_predictions = tf.zeros_like(predictions)
tp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, nodule_actuals),
tf.equal(predictions, nodule_predictions)
),
tf.float32
)
)
tn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, non_nodule_actuals),
tf.equal(predictions, non_nodule_predictions)
),
tf.float32
)
)
fp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, non_nodule_actuals),
tf.equal(predictions, nodule_predictions)
),
tf.float32
)
)
fn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, nodule_actuals),
tf.equal(predictions, non_nodule_predictions)
),
tf.float32
)
)
false_positive_rate = fp_op / (fp_op + tn_op)
recall = tp_op / (tp_op + fn_op)
return recall, false_positive_rate
def pad_mask(seqs):
mask = tf.where(seqs == 0, tf.zeros_like(seqs),
tf.ones_like(seqs)) # 0 idx is padding
return tf.cast(tf.expand_dims(mask, axis=1) *
tf.expand_dims(mask, axis=2),
dtype=tf.bool) # [n, step, step]
def decoder(target, state, params):
mask = dtype.tf_to_float(tf.cast(target, tf.bool))
hidden_size = params.hidden_size
is_training = ('decoder' not in state)
if is_training:
target, mask = util.remove_invalid_seq(target, mask)
embed_name = "embedding" if params.shared_source_target_embedding \
else "tgt_embedding"
tgt_emb = tf.get_variable(embed_name,
[params.tgt_vocab.size(), params.embed_size])
tgt_bias = tf.get_variable("bias", [params.embed_size])
inputs = tf.gather(tgt_emb, target)
inputs = tf.nn.bias_add(inputs, tgt_bias)
# shift
if is_training:
inputs = tf.pad(inputs, [[0, 0], [1, 0], [0, 0]])
inputs = inputs[:, :-1, :]
else:
inputs = tf.cond(
tf.reduce_all(tf.equal(target, params.tgt_vocab.pad())),
lambda: tf.zeros_like(inputs), lambda: inputs)
mask = tf.ones_like(mask)
inputs = util.valid_apply_dropout(inputs, params.dropout)
with tf.variable_scope("decoder"):
init_state = state["decoder_initializer"]
if not is_training:
init_state = state["decoder"]["state"]
returns = rnn.cond_rnn(params.cell,
inputs,
state["encodes"],
hidden_size,
init_state=init_state,
mask=mask,
mem_mask=state["mask"],
ln=params.layer_norm,
sm=params.swap_memory,
one2one=False)
(_, hidden_state), (outputs, _), contexts, attentions = returns
feature = linear([outputs, contexts, inputs],
params.embed_size,
ln=params.layer_norm,
scope="pre_logits")
if 'dev_decode' in state:
feature = feature[:, -1, :]
feature = tf.tanh(feature)
feature = util.valid_apply_dropout(feature, params.dropout)
embed_name = "tgt_embedding" if params.shared_target_softmax_embedding \
else "softmax_embedding"
embed_name = "embedding" if params.shared_source_target_embedding \
else embed_name
softmax_emb = tf.get_variable(embed_name,
[params.tgt_vocab.size(), params.embed_size])
feature = tf.reshape(feature, [-1, params.embed_size])
logits = tf.matmul(feature, softmax_emb, False, True)
logits = tf.cast(logits, tf.float32)
soft_label, normalizer = util.label_smooth(target,
util.shape_list(logits)[-1],
factor=params.label_smooth)
centropy = tf.nn.softmax_cross_entropy_with_logits_v2(logits=logits,
labels=soft_label)
centropy -= normalizer
centropy = tf.reshape(centropy, tf.shape(target))
mask = tf.cast(mask, tf.float32)
per_sample_loss = tf.reduce_sum(centropy * mask, -1) / tf.reduce_sum(
mask, -1)
loss = tf.reduce_mean(per_sample_loss)
# these mask tricks mainly used to deal with zero shapes, such as [0, 1]
loss = tf.cond(tf.equal(tf.shape(target)[0], 0),
lambda: tf.constant(0, dtype=tf.float32), lambda: loss)
if not is_training:
state['decoder']['state'] = hidden_state
return loss, logits, state, per_sample_loss
def masked_conv_v2(u,
filter_1,
filter_2,
mask_1,
mask_2,
conductivity_1,
conductivity_2,
eps=0.01,
filter_banks=None):
'''not accurate still around the corner'''
# center
mask_filter = np.asarray(
[[1 / 4., 0., 1 / 4.], [0., 0., 0.], [1 / 4., 0., 1 / 4.]], 'float32')
mask_filter = tf.constant(mask_filter.reshape((3, 3, 1, 1)))
padded_mask_1 = tf.pad(mask_1, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC")
boundary_weight = tf.nn.conv2d(input=padded_mask_1,
filter=mask_filter,
strides=[1, 1, 1, 1],
padding='VALID')
w = 1000.
boundary_weight = 1 / 4. + 1 / 4. * tf.sigmoid(
w * (boundary_weight - 1.25 / 4.)) + 1 / 4. * tf.sigmoid(
w * (boundary_weight - 2.75 / 4.))
boundary_mask = tf.round(mask_1 + 0.1) + tf.round(mask_2 + 0.1) - 1
mat1_mask = (boundary_weight) * boundary_mask * (-8 / 3. * conductivity_1)
mat2_mask = (1 - boundary_weight) * boundary_mask * (-8 / 3. *
conductivity_2)
boundary_d_matrix = mat1_mask + mat2_mask
mat1_d_matrix = tf.round(mask_1 - 0.1) * (-8 / 3. * conductivity_1)
mat2_d_matrix = tf.round(mask_2 - 0.1) * (-8 / 3. * conductivity_2)
d_matrix = boundary_d_matrix + mat1_d_matrix + mat2_d_matrix
d_u = d_matrix * u
# surrounding
# not accurate only on the boundary, two parts from two different material
padded_u_1 = tf.pad(u * tf.round(mask_1 + eps),
[[0, 0], [1, 1], [1, 1], [0, 0]], "SYMMETRIC")
output_1 = tf.nn.conv2d(input=padded_u_1,
filter=filter_1,
strides=[1, 1, 1, 1],
padding='VALID')
padded_u_2 = tf.pad(u * tf.round(mask_2 + eps),
[[0, 0], [1, 1], [1, 1], [0, 0]], "SYMMETRIC")
output_2 = tf.nn.conv2d(input=padded_u_2,
filter=filter_2,
strides=[1, 1, 1, 1],
padding='VALID')
res1 = output_1 * mask_1 + output_2 * mask_2
# accurate only on the boundary, two parts from two different material
padded_u_1 = tf.pad(u * mask_1, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC")
output_1 = tf.nn.conv2d(input=padded_u_1,
filter=filter_1,
strides=[1, 1, 1, 1],
padding='VALID')
padded_u_2 = tf.pad(u * mask_2, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC")
output_2 = tf.nn.conv2d(input=padded_u_2,
filter=filter_2,
strides=[1, 1, 1, 1],
padding='VALID')
res2 = output_1 + output_2
LU_u = res1 * (tf.round(mask_1-0.1) + tf.round(mask_2-0.1)) + \
res2 * (tf.ones_like(mask_1) - tf.round(mask_1-0.1) - tf.round(mask_2-0.1))
result = d_u + LU_u
tmp = {
'result': result,
'res1': res1,
'res2': res2,
'LU_u': LU_u,
'd_matrix': d_matrix,
'd_u': d_u,
'boundary_d_matrix': boundary_d_matrix,
'boundary_weight': boundary_weight,
'mat1_d_matrix': mat1_d_matrix,
'mat2_d_matrix': mat2_d_matrix,
}
return tmp
def masked_conv_v3(u, filter_1, filter_2, mask_1, mask_2, conductivity_1,
conductivity_2, filter_banks):
'''
problematic in d_matrix corner and conv_corner
:param u:
:param filter_1:
:param filter_2:
:param mask_1:
:param mask_2:
:param conductivity_1:
:param conductivity_2:
:param filter_banks:
:return:
'''
boundary_mask = tf.round(mask_1 + 0.1) + tf.round(mask_2 + 0.1) - 1
boundary_d_matrix = boundary_mask * (-8 / 3. *
(conductivity_1 + conductivity_2) /
2.)
mat1_d_matrix = tf.round(mask_1 - 0.1) * (-8 / 3. * conductivity_1)
mat2_d_matrix = tf.round(mask_2 - 0.1) * (-8 / 3. * conductivity_2)
d_matrix = boundary_d_matrix + mat1_d_matrix + mat2_d_matrix
d_u = d_matrix * u
# padded_input = tf.pad(u * mask_1, [[0, 0], [1, 1], [1, 1], [0, 0]], "SYMMETRIC") # convolution with symmetric padding at boundary
# output_1 = tf.nn.conv2d(input=padded_input, filter=filter_banks['filter_1_side'], strides=[1, 1, 1, 1], padding='VALID')
# padded_input = tf.pad(u * mask_2, [[0, 0], [1, 1], [1, 1], [0, 0]], "SYMMETRIC") # convolution with symmetric padding at boundary
# output_2 = tf.nn.conv2d(input=padded_input, filter=filter_banks['filter_2_side'], strides=[1, 1, 1, 1], padding='VALID')
# side_conv_res = output_1 + output_2
padded_input = tf.pad(
u * tf.round(mask_1 + 0.1), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_1_side = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_1_side'],
strides=[1, 1, 1, 1],
padding='VALID')
padded_input = tf.pad(
u * tf.round(mask_2 + 0.1), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_2_side = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_2_side'],
strides=[1, 1, 1, 1],
padding='VALID')
res1 = output_1_side * mask_1 + output_2_side * mask_2
padded_input = tf.pad(
u * mask_1, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_1_side_refine = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_1_side'],
strides=[1, 1, 1, 1],
padding='VALID')
padded_input = tf.pad(
u * mask_2, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_2_side_refine = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_2_side'],
strides=[1, 1, 1, 1],
padding='VALID')
res2 = output_1_side_refine * mask_1 + output_2_side_refine * mask_1
side_conv_res = res1 * (tf.round(mask_1-0.1) + tf.round(mask_2-0.1)) + \
res2 * (tf.ones_like(mask_1) - tf.round(mask_1-0.1) - tf.round(mask_2-0.1))
padded_input = tf.pad(
u * tf.round(mask_1 + 0.1), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_1_corner = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_1_corner'],
strides=[1, 1, 1, 1],
padding='VALID')
padded_input = tf.pad(
u * tf.round(mask_2 + 0.1), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_2_corner = tf.nn.conv2d(input=padded_input,
filter=filter_banks['filter_2_corner'],
strides=[1, 1, 1, 1],
padding='VALID')
corner_conv_res = output_1_corner + output_2_corner
LU_u = corner_conv_res + side_conv_res
result = d_u + LU_u
tmp = {
'result': result,
'LU_u': LU_u,
'd_matrix': d_matrix,
'res1': res1,
'res2': res2,
'side_conv_res': side_conv_res,
'output_1_side': output_1_side,
'output_2_side': output_2_side,
'output_1_side_refine': output_1_side_refine,
'output_2_side_refine': output_2_side_refine,
'corner_conv_res': corner_conv_res,
'output_1_corner': output_1_corner,
'output_2_corner': output_2_corner,
}
return tmp
def do_dual_max_match(overlap_matrix,
low_thres,
high_thres,
ignore_between=True,
gt_max_first=True):
'''
overlap_matrix: num_gt * num_anchors
'''
with tf.name_scope('dual_max_match', [overlap_matrix]):
# first match from anchors' side
anchors_to_gt = tf.argmax(overlap_matrix, axis=0)
# the matching degree
match_values = tf.reduce_max(overlap_matrix, axis=0)
#positive_mask = tf.greater(match_values, high_thres)
less_mask = tf.less(match_values, low_thres)
between_mask = tf.logical_and(
tf.less(match_values, high_thres),
tf.greater_equal(match_values, low_thres))
negative_mask = less_mask if ignore_between else between_mask
ignore_mask = between_mask if ignore_between else less_mask
# fill all negative positions with -1, all ignore positions is -2
match_indices = tf.where(negative_mask,
-1 * tf.ones_like(anchors_to_gt),
anchors_to_gt)
match_indices = tf.where(ignore_mask, -2 * tf.ones_like(match_indices),
match_indices)
# negtive values has no effect in tf.one_hot, that means all zeros along that axis
# so all positive match positions in anchors_to_gt_mask is 1, all others are 0
anchors_to_gt_mask = tf.one_hot(tf.clip_by_value(
match_indices, -1, tf.cast(tf.shape(overlap_matrix)[0], tf.int64)),
tf.shape(overlap_matrix)[0],
on_value=1,
off_value=0,
axis=0,
dtype=tf.int32)
# match from ground truth's side
gt_to_anchors = tf.argmax(overlap_matrix, axis=1)
if gt_max_first:
# the max match from ground truth's side has higher priority
left_gt_to_anchors_mask = tf.one_hot(gt_to_anchors,
tf.shape(overlap_matrix)[1],
on_value=1,
off_value=0,
axis=1,
dtype=tf.int32)
else:
# the max match from anchors' side has higher priority
# use match result from ground truth's side only when the the matching degree from anchors' side is lower than position threshold
left_gt_to_anchors_mask = tf.cast(
tf.logical_and(
tf.reduce_max(anchors_to_gt_mask, axis=1, keep_dims=True) <
1,
tf.one_hot(gt_to_anchors,
tf.shape(overlap_matrix)[1],
on_value=True,
off_value=False,
axis=1,
dtype=tf.bool)), tf.int64)
# can not use left_gt_to_anchors_mask here, because there are many ground truthes match to one anchor, we should pick the highest one even when we are merging matching from ground truth side
left_gt_to_anchors_scores = overlap_matrix * tf.to_float(
left_gt_to_anchors_mask)
# merge matching results from ground truth's side with the original matching results from anchors' side
# then select all the overlap score of those matching pairs
selected_scores = tf.gather_nd(
overlap_matrix,
tf.stack([
tf.where(
tf.reduce_max(left_gt_to_anchors_mask, axis=0) > 0,
tf.argmax(left_gt_to_anchors_scores, axis=0),
anchors_to_gt),
tf.range(tf.cast(tf.shape(overlap_matrix)[1], tf.int64))
],
axis=1))
# return the matching results for both foreground anchors and background anchors, also with overlap scores
return tf.where(
tf.reduce_max(left_gt_to_anchors_mask, axis=0) > 0,
tf.argmax(left_gt_to_anchors_scores, axis=0),
match_indices), selected_scores
def _trainable_score_fn(context_features, example_features, mode):
del context_features, mode
input_layer = tf.ones_like(example_features["f1"])
return tf.compat.v1.layers.dense(input_layer, units=1)
def masking(self, inputs, q, k, mask_type='key'):
'''
inputs:
product from tf.matmul(Q_mh, tf.transpose(K_mh, [0, 2, 1]))
inputs.shape = (N, Tq, Tk)
q:
q.shape = (h*N, Tq, d_model/h)
k:
k.shape = (h*N, Tk, d_model/h)
type:
k, key, keys
the masking basing on k
q, query, queries
the masking basing on q
f, feature
the masking basing on the lower triangular identity matrix
Because need to prevent leftward information flow in the decoder to preserve the auto-regressive property,
they implement this inside of scaled dot-product attention by masking out all values in the input (minus infinity)
of the softmax which correspond to illegal connections.
'''
padding_num = -2**32 + 1
if mask_type in ("k", "key", "keys"):
# Generate masks
masks = tf.sign(tf.reduce_sum(tf.abs(k),
axis=-1)) # shape = (h*N, Tk)
masks = tf.expand_dims(masks, 1) # shape = (h*N, 1, Tk)
masks = tf.tile(masks,
[1, tf.shape(q)[1], 1]) # shape = (h*N, Tq, Tk)
# Apply masks to inputs
paddings = tf.ones_like(inputs) * padding_num
outputs = tf.where(tf.equal(masks, 0), paddings,
inputs) # shape = (h*N, Tq, Tk)
elif mask_type in ("q", "query", "queries"):
# Generate masks
masks = tf.sign(tf.reduce_sum(tf.abs(q),
axis=-1)) # shape = (h*N, Tq)
masks = tf.expand_dims(masks, -1) # shape = (h*N, Tq, 1)
masks = tf.tile(masks,
[1, 1, tf.shape(k)[1]]) # shape = (h*N, Tq, Tk)
# Apply masks to inputs
outputs = inputs * masks
elif mask_type in ("f", "future"):
diag_vals = tf.ones_like(inputs[0, :, :]) # shape = (Tq, Tk)
tril = tf.linalg.LinearOperatorLowerTriangular(
diag_vals).to_dense() # shape = (Tq, Tk)
masks = tf.tile(tf.expand_dims(
tril, 0), [tf.shape(inputs)[0], 1, 1]) # shape = (h*N, Tq, Tk)
paddings = tf.ones_like(masks) * padding_num
outputs = tf.where(tf.equal(masks, 0), paddings, inputs)
else:
print("Check if you entered type correctly!")
return outputs
def create_model(
bert_config,
is_training,
input_ids,
input_mask,
input_type_ids,
labels,
num_labels,
use_one_hot_embeddings,
tsa,
unsup_ratio,
global_step,
num_train_steps,
):
num_sample = input_ids.shape[0].value
if is_training:
assert num_sample % (1 + 2 * unsup_ratio) == 0
sup_batch_size = num_sample // (1 + 2 * unsup_ratio)
unsup_batch_size = sup_batch_size * unsup_ratio
else:
sup_batch_size = num_sample
unsup_batch_size = 0
model = modeling.AlbertModel(
config=bert_config,
is_training=True,
input_ids=input_ids,
input_mask=input_mask,
token_type_ids=input_type_ids,
use_one_hot_embeddings=use_one_hot_embeddings)
pooled = model.get_pooled_output()
clas_logits = hidden_to_logits(
hidden=pooled,
is_training=is_training,
num_classes=num_labels,
scope="classifier")
log_probs = tf.nn.log_softmax(clas_logits, axis=-1)
correct_label_probs = None
with tf.variable_scope("sup_loss"):
sup_log_probs = log_probs[:sup_batch_size]
one_hot_labels = tf.one_hot(labels, depth=num_labels, dtype=tf.float32)
tgt_label_prob = one_hot_labels
per_example_loss = -tf.reduce_sum(tgt_label_prob * sup_log_probs, axis=-1)
loss_mask = tf.ones_like(per_example_loss, dtype=per_example_loss.dtype)
correct_label_probs = tf.reduce_sum(
one_hot_labels * tf.exp(sup_log_probs), axis=-1)
if tsa:
tsa_start = 1. / num_labels
tsa_threshold = get_tsa_threshold(
tsa, global_step, num_train_steps,
tsa_start, end=1)
larger_than_threshold = tf.greater(
correct_label_probs, tsa_threshold)
loss_mask = loss_mask * (1 - tf.cast(larger_than_threshold, tf.float32))
else:
tsa_threshold = 1
loss_mask = tf.stop_gradient(loss_mask)
per_example_loss = per_example_loss * loss_mask
sup_loss = (tf.reduce_sum(per_example_loss) /
tf.maximum(tf.reduce_sum(loss_mask), 1))
unsup_loss_mask = None
if is_training and unsup_ratio > 0:
print("pooled:{} ".format(pooled))
print("clas_logits:{} ".format(clas_logits))
print("log_probs:{} ".format(log_probs))
with tf.variable_scope("unsup_loss"):
ori_start = sup_batch_size
ori_end = ori_start + unsup_batch_size
aug_start = sup_batch_size + unsup_batch_size
aug_end = aug_start + unsup_batch_size
ori_log_probs = log_probs[ori_start : ori_end]
aug_log_probs = log_probs[aug_start : aug_end]
unsup_loss_mask = 1
if FLAGS.uda_softmax_temp != -1:
tgt_ori_log_probs = tf.nn.log_softmax(
clas_logits[ori_start : ori_end] / FLAGS.uda_softmax_temp,
axis=-1)
tgt_ori_log_probs = tf.stop_gradient(tgt_ori_log_probs)
else:
tgt_ori_log_probs = tf.stop_gradient(ori_log_probs)
if FLAGS.uda_confidence_thresh != -1:
largest_prob = tf.reduce_max(tf.exp(ori_log_probs), axis=-1)
unsup_loss_mask = tf.cast(tf.greater(
largest_prob, FLAGS.uda_confidence_thresh), tf.float32)
unsup_loss_mask = tf.stop_gradient(unsup_loss_mask)
per_example_kl_loss = kl_for_log_probs(
tgt_ori_log_probs, aug_log_probs) * unsup_loss_mask
unsup_loss = tf.reduce_mean(per_example_kl_loss)
else:
unsup_loss = 0.
return (sup_loss, unsup_loss, clas_logits[:sup_batch_size],
per_example_loss, loss_mask,
tsa_threshold, unsup_loss_mask, correct_label_probs,pooled)
def recurseKdiag(self, Kdiag):
# angle is zero, hence the diagonal stays the same (if scaled relu is used)
return self.variance * Kdiag + self.bias_variance * tf.ones_like(Kdiag)
def _multiheadAttention(self,
rawKeys,
queries,
keys,
numUnits=None,
causality=False,
scope="multiheadAttention"):
# rawKeys 的作用是为了计算mask时用的，因为keys是加上了position embedding的，其中不存在padding为0的值
numHeads = self.config.model.numHeads #头数，目前设置为8
keepProp = self.config.model.keepProp #dropout数量
if numUnits is None: #若是没传入值，直接去输入数据的最后一维，即embedding size.embeddingSize = 200
numUnits = queries.get_shape().as_list()[-1]
# tf.layers.dense可以做多维tensor数据的非线性映射，在计算self-Attention时，一定要对这三个值进行非线性映射，
# 其实这一步就是论文中Multi-Head Attention中的对分割后的数据进行权重映射的步骤，我们在这里先映射后分割，原则上是一样的。
# Q, K, V的维度都是[batch_size, sequence_length, embedding_size]
Q = tf.layers.dense(queries, numUnits, activation=tf.nn.relu)
K = tf.layers.dense(keys, numUnits, activation=tf.nn.relu)
V = tf.layers.dense(keys, numUnits, activation=tf.nn.relu)
# 将数据按最后一维分割成num_heads个, 然后按照第一维拼接
# Q, K, V 的维度都是[batch_size * numHeads, sequence_length, embedding_size/numHeads]
Q_ = tf.concat(tf.split(Q, numHeads, axis=-1), axis=0)
K_ = tf.concat(tf.split(K, numHeads, axis=-1), axis=0)
V_ = tf.concat(tf.split(V, numHeads, axis=-1), axis=0)
# 计算keys和queries之间的点积，维度[batch_size * numHeads, queries_len, key_len], 后两维是queries和keys的序列长度
similary = tf.matmul(Q_, tf.transpose(K_, [0, 2, 1]))
# 对计算的点积进行缩放处理，除以向量长度的根号值
scaledSimilary = similary / (K_.get_shape().as_list()[-1]**0.5)
# 在我们输入的序列中会存在padding这个样的填充词，这种词应该对最终的结果是毫无帮助的，原则上说当padding都是输入0时，
# 计算出来的权重应该也是0，但是在transformer中引入了位置向量，当和位置向量相加之后，其值就不为0了，因此在添加位置向量
# 之前，我们需要将其mask为0。虽然在queries中也存在这样的填充词，但原则上模型的结果之和输入有关，而且在self-Attention中
# queryies = keys，因此只要一方为0，计算出的权重就为0。
# 具体关于key mask的介绍可以看看这里： https://github.com/Kyubyong/transformer/issues/3
# 利用tf，tile进行张量扩张， 维度[batch_size * numHeads, keys_len] keys_len = keys 的序列长度
keyMasks = tf.tile(rawKeys, [numHeads, 1])
# 增加一个维度，并进行扩张，得到维度[batch_size * numHeads, queries_len, keys_len]
keyMasks = tf.tile(tf.expand_dims(keyMasks, 1),
[1, tf.shape(queries)[1], 1])
# tf.ones_like生成元素全为1，维度和scaledSimilary相同的tensor, 然后得到负无穷大的值
paddings = tf.ones_like(scaledSimilary) * (-2**(32 + 1))
# tf.where(condition, x, y),condition中的元素为bool值，其中对应的True用x中的元素替换，对应的False用y中的元素替换
# 因此condition,x,y的维度是一样的。下面就是keyMasks中的值为0就用paddings中的值替换
maskedSimilary = tf.where(
tf.equal(keyMasks, 0), paddings,
scaledSimilary) # 维度[batch_size * numHeads, queries_len, key_len]
# 在计算当前的词时，只考虑上文，不考虑下文，出现在Transformer Decoder中。在文本分类时，可以只用Transformer Encoder。
# Decoder是生成模型，主要用在语言生成中
if causality:
diagVals = tf.ones_like(
maskedSimilary[0, :, :]) # [queries_len, keys_len]
tril = tf.contrib.linalg.LinearOperatorTriL(
diagVals).to_dense() # [queries_len, keys_len]
masks = tf.tile(tf.expand_dims(
tril, 0), [tf.shape(maskedSimilary)[0], 1, 1
]) # [batch_size * numHeads, queries_len, keys_len]
paddings = tf.ones_like(masks) * (-2**(32 + 1))
maskedSimilary = tf.where(
tf.equal(masks, 0), paddings, maskedSimilary
) # [batch_size * numHeads, queries_len, keys_len]
# 通过softmax计算权重系数，维度 [batch_size * numHeads, queries_len, keys_len]
weights = tf.nn.softmax(maskedSimilary)
# 加权和得到输出值, 维度[batch_size * numHeads, sequence_length, embedding_size/numHeads]
outputs = tf.matmul(weights, V_)
# 将多头Attention计算的得到的输出重组成最初的维度[batch_size, sequence_length, embedding_size]
outputs = tf.concat(tf.split(outputs, numHeads, axis=0), axis=2)
outputs = tf.nn.dropout(outputs, keep_prob=keepProp)
# 对每个subLayers建立残差连接，即H(x) = F(x) + x
outputs += queries
# normalization 层
outputs = self._layerNormalization(outputs)
return outputs
def build_model(self):
self.is_training = tf.placeholder(tf.bool, name='is_training')
self.images = tf.placeholder(tf.float32, [None] + self.image_shape,
name='real_images')
self.lowres_images = tf.reduce_mean(
tf.reshape(self.images, [
self.batch_size, self.lowres_size, self.lowres,
self.lowres_size, self.lowres, self.c_dim
]), [2, 4])
self.z = tf.placeholder(tf.float32, [None, self.z_dim], name='z')
self.z_sum = tf.summary.histogram("z", self.z)
self.G = self.generator(self.z)
self.lowres_G = tf.reduce_mean(
tf.reshape(self.G, [
self.batch_size, self.lowres_size, self.lowres,
self.lowres_size, self.lowres, self.c_dim
]), [2, 4])
self.D, self.D_logits = self.discriminator(self.images)
self.D_, self.D_logits_ = self.discriminator(self.G, reuse=True)
self.d_sum = tf.summary.histogram("d", self.D)
self.d__sum = tf.summary.histogram("d_", self.D_)
self.G_sum = tf.summary.image("G", self.G)
self.d_loss_real = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits,
labels=tf.ones_like(
self.D)))
self.d_loss_fake = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits_,
labels=tf.zeros_like(
self.D_)))
self.g_loss = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(logits=self.D_logits_,
labels=tf.ones_like(
self.D_)))
self.d_loss_real_sum = tf.summary.scalar("d_loss_real",
self.d_loss_real)
self.d_loss_fake_sum = tf.summary.scalar("d_loss_fake",
self.d_loss_fake)
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss_sum = tf.summary.scalar("g_loss", self.g_loss)
self.d_loss_sum = tf.summary.scalar("d_loss", self.d_loss)
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
self.saver = tf.train.Saver(max_to_keep=1)
# Completion.
self.mask = tf.placeholder(tf.float32, self.image_shape, name='mask')
self.lowres_mask = tf.placeholder(tf.float32,
self.lowres_shape,
name='lowres_mask')
self.contextual_loss = tf.reduce_sum(
tf.contrib.layers.flatten(
tf.abs(
tf.multiply(self.mask, self.G) -
tf.multiply(self.mask, self.images))), 1)
self.contextual_loss += tf.reduce_sum(
tf.contrib.layers.flatten(
tf.abs(
tf.multiply(self.lowres_mask, self.lowres_G) -
tf.multiply(self.lowres_mask, self.lowres_images))), 1)
self.perceptual_loss = self.g_loss
self.complete_loss = self.contextual_loss + self.lam * self.perceptual_loss
self.grad_complete_loss = tf.gradients(self.complete_loss, self.z)
def build_model(x, labels=None, reuse=False):
if reuse:
prefix = 'test_'
else:
prefix = 'train_'
with tf.variable_scope(tf.get_variable_scope(), reuse=reuse):
conv_pointers = [InputLayer(x, name='c_disc_inputs')]
for i, v in enumerate(CONVOLUTIONS):
if v < 0:
strides = (2, 2)
v *= -1
else:
strides = (1, 1)
curr_layer = BatchNormLayer(Conv2d(conv_pointers[-1],
CONVOLUTIONS[i], (5, 5),
strides=strides,
name='c_conv1_%s' % (i)),
act=tf.nn.leaky_relu,
is_train=True,
name='c_batch_norm%s' % (i))
if i < len(CONVOLUTIONS) - 1:
# conv_pointers.append(ConcatLayer([curr_layer, conv_pointers[-1]],
# 3, name = 'concat_layer%s'%(i)))
conv_pointers.append(curr_layer)
else:
conv_pointers.append(curr_layer)
# y_conv = DenseLayer(flat, m.fully_connected_size, act=tf.nn.relu,name = 'hidden_encode')
pre_max_pool = Conv2d(conv_pointers[-1],
1, (1, 1),
strides=(1, 1),
name='c_Final_Conv')
_, pm_width, pm_height, _ = pre_max_pool.outputs.get_shape()
max_pool_width, max_pool_height = pm_width / DIVIDEND, pm_height / DIVIDEND
max_pool = MaxPool2d(pre_max_pool,
filter_size=(max_pool_width, max_pool_height),
strides=(max_pool_width, max_pool_height),
name='c_Final_Pool')
if labels is None:
return tf.round(tf.sigmoid(max_pool.outputs))
logits = FlattenLayer(max_pool).outputs
final_guess = tf.round(tf.sigmoid(logits))
flat_labels = tf.contrib.layers.flatten(labels)
cross_entropy = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(labels=flat_labels,
logits=logits))
train_step = tf.train.AdamOptimizer(LEARNING_RATE).minimize(
cross_entropy)
accuracy_summary = tf.summary.scalar(
'Accuracy',
tf.reduce_mean(
tf.cast(tf.equal(flat_labels, final_guess), tf.float32)))
percent_found_summary_round = tf.summary.scalar(
'Percent Found Rounded', tf.reduce_mean(final_guess))
percent_found_summary = tf.summary.scalar(
'Percent Found Nonrounded', tf.reduce_mean(tf.sigmoid(logits)))
flat_labels = tf.cast(flat_labels, tf.float64)
final_guess = tf.cast(final_guess, tf.float64)
TP = tf.count_nonzero(final_guess * flat_labels, dtype=tf.float32)
TN = tf.count_nonzero((final_guess - 1) * (flat_labels - 1),
dtype=tf.float32)
FP = tf.count_nonzero(final_guess * (flat_labels - 1),
dtype=tf.float32)
FN = tf.count_nonzero((final_guess - 1) * flat_labels,
dtype=tf.float32)
true_positive = tf.divide(TP, TP + FP)
true_negative = tf.divide(TN, TN + FN)
# accuracy = tf.divide(TP + TN, TN + FN + TP + FP)
# accuracy_summary = tf.summary.scalar('Accuracy', accuracy)
true_positive_summary = tf.summary.scalar('True Positive',
true_positive)
true_negative_summary = tf.summary.scalar('True Negative',
true_negative)
# resized_label = tf.image.resize_images(labels,size = (BASE_INPUT_SHAPE[0], BASE_INPUT_SHAPE[1]))
# resized_output = tf.image.resize_images(tf.sigmoid(max_pool.outputs),size = (BASE_INPUT_SHAPE[0], BASE_INPUT_SHAPE[1]))
# tiled_labels = tf.tile(tf.expand_dims(resized_label, axis = -1), [1,1,1,3])
# tiled_outputs = tf.tile(resized_output, [1,1,1,3])
image_summary = tf.summary.image(
"Example",
tf.concat([
tf.sigmoid(max_pool.outputs),
tf.expand_dims(labels, axis=-1),
tf.ones_like(max_pool.outputs)
],
axis=2),
max_outputs=MAX_OUTPUTS) #show fake image
# image_summary_2 = tf.summary.image("Example_2", x,max_outputs = MAX_OUTPUTS)#show fake image
# image_summary_merge = tf.summary.merge([image_summary,image_summary_2])
cross_entropy_summary = tf.summary.scalar('Loss', cross_entropy)
real_summary = tf.summary.merge([
cross_entropy_summary, accuracy_summary,
percent_found_summary_round, percent_found_summary,
true_negative_summary, true_positive_summary
])
return real_summary, image_summary, train_step
def _init_graph(self):
#初始化Tensorflow计算图，包括输入数据，变量，模型，损失和优化
self.graph = tf.Graph()
with self.graph.as_default(): # 默认使用cpu:
tf.set_random_seed(self.random_seed)
# 输入数据
self.train_features = tf.placeholder(tf.int32, shape=[None, None], name="train_features") # None * features_M
self.train_labels = tf.placeholder(tf.float32, shape=[None, 1], name="train_labels") # None * 1
self.dropout_keep = tf.placeholder(tf.float32, shape=[None], name="dropout_keep")
self.train_phase = tf.placeholder(tf.bool, name="train_phase")
# 变量
self.weights = self._initialize_weights()
# 模型定义
self.nonzero_embeddings = tf.nn.embedding_lookup(self.weights['feature_embeddings'], self.train_features) # None * M' * K; M'即fields, K即em_factor
#Pair-wise Interation Layer
element_wise_product_list = []
for i in range(0, self.fields):
for j in range(i+1, self.fields):
element_wise_product_list.append(tf.multiply(self.nonzero_embeddings[:,i,:], self.nonzero_embeddings[:,j,:]))
#将一个list变为一个tensor，上述list由M'*(M'-1)个None * K的tensor组成
self.element_wise_product = tf.stack(element_wise_product_list) # (M'*(M'-1)) * None * K
self.element_wise_product = tf.transpose(self.element_wise_product, perm=[1,0,2], name="element_wise_product") # None * (M'*(M'-1)) * K
self.interactions = tf.reduce_sum(self.element_wise_product, 2, name="interactions") # None * (M'*(M'-1))
# _________ 注意力机制部分 _____________
num_interactions = int(self.fields*(self.fields-1)/2)
if self.attention:
self.attention_mul = tf.reshape(tf.matmul(tf.reshape(self.element_wise_product, shape=[-1, self.em_factor]), \
self.weights['attention_W']), shape=[-1, num_interactions, self.attention_factor])
#上式中第一个reshape的目的size由None * (M'*(M'-1)) * K 变为 (None*(M'*(M'-1))) * K, 因为后面的权重为二维tensor
#第一个reshpae再讲size变回None * (M'*(M'-1)) * attention_factor
self.attention_exp = tf.exp(tf.reduce_sum(tf.multiply(self.weights['attention_p'], tf.nn.relu(self.attention_mul + \
self.weights['attention_b'])), 2, keep_dims=True)) # None * (M'*(M'-1)) * 1
self.attention_sum = tf.reduce_sum(self.attention_exp, 1, keep_dims=True) # None * 1 * 1
self.attention_out = tf.div(self.attention_exp, self.attention_sum, name="attention_out") # None * (M'*(M'-1)) * 1
#attention不使用dropout和bn处理，对该网络的权重使用L2正则化
# _________ 基于注意力机制的池化层 _____________
if self.attention:
self.AFM = tf.reduce_sum(tf.multiply(self.attention_out, self.element_wise_product), 1, name="afm") # None * K
else:
self.AFM = tf.reduce_sum(self.element_wise_product, 1, name="afm") # None * K
#对attention后的输出执行BN操作
if self.bn:
self.AFM = self.batch_norm_layer(self.AFM, train_phase=self.train_phase, scope_bn='bn_fm')
#对attention后的输出执行dropout操作
self.AFM = tf.nn.dropout(self.AFM, self.dropout_keep[0]) # dropout
# ___________ 输出层 ___________________
self.Bilinear = tf.matmul(self.AFM, self.weights['prediction']) # None * 1
#Bilinear = tf.reduce_sum(self.Bilinear, 1, keep_dims=True) # None * 1
self.Feature_bias = tf.reduce_sum(tf.nn.embedding_lookup(self.weights['feature_bias'], self.train_features) , 1) # None * 1
Bias = self.weights['bias'] * tf.ones_like(self.train_labels) # None * 1
self.out = tf.add_n([self.Bilinear, self.Feature_bias, Bias], name="out_afm") # None * 1
# 计算损失
if self.attention and self.lamda_attention > 0:
self.loss = tf.nn.l2_loss(tf.subtract(self.train_labels, self.out)) + tf.contrib.layers.l2_regularizer(self.lamda_attention)(self.weights['attention_W']) # regulizer
else:
self.loss = tf.nn.l2_loss(tf.subtract(self.train_labels, self.out))
if self.lamde_em > 0:
self.loss = self.loss + tf.contrib.layers.l2_regularizer(self.lamda_em)(self.weights['feature_embeddings']) # regulizer
# 优化方法
if self.optimizer_type == 'AdamOptimizer':
self.optimizer = tf.train.AdamOptimizer(learning_rate=self.learning_rate, beta1=0.9, beta2=0.999, epsilon=1e-8).minimize(self.loss)
elif self.optimizer_type == 'AdagradOptimizer':
self.optimizer = tf.train.AdagradOptimizer(learning_rate=self.learning_rate, initial_accumulator_value=1e-8).minimize(self.loss)
elif self.optimizer_type == 'GradientDescentOptimizer':
self.optimizer = tf.train.GradientDescentOptimizer(learning_rate=self.learning_rate).minimize(self.loss)
elif self.optimizer_type == 'MomentumOptimizer':
self.optimizer = tf.train.MomentumOptimizer(learning_rate=self.learning_rate, momentum=0.95).minimize(self.loss)
# 初始化
self.saver = tf.train.Saver()
init = tf.global_variables_initializer()
self.sess = tf.Session()
self.sess.run(init)
# 参数数目
total_parameters = 0
for variable in self.weights.values():
shape = variable.get_shape() # shape is an array of tf.Dimension
variable_parameters = 1
for dim in shape:
variable_parameters *= dim.value
total_parameters += variable_parameters
if self.verbose > 0:
print ("#params: %d" %total_parameters)
def __init__(
self, sequence_length, num_classes,
embedding_size, filter_sizes, num_filters, l2_reg_lambda=0.0):
# Placeholders for input, output, dropout
self.input_x = tf.placeholder(tf.float32, [None, sequence_length, embedding_size], name = "input_x")
self.input_y = tf.placeholder(tf.float32, [None, num_classes], name = "input_y")
self.dropout_keep_prob = tf.placeholder(tf.float32, name = "dropout_keep_prob")
# Keeping track of l2 regularization loss (optional)
l2_loss = tf.constant(0.0)
# Embedding layer
# self.embedded_chars = [None(batch_size), sequence_size, embedding_size]
# self.embedded_chars = [None(batch_size), sequence_size, embedding_size, 1(num_channels)]
self.embedded_chars = self.input_x
self.embedded_chars_expended = tf.expand_dims(self.embedded_chars, -1)
# Create a convolution + maxpool layer for each filter size
pooled_outputs = []
for i, filter_size in enumerate(filter_sizes):
with tf.name_scope("conv-maxpool-%s" % filter_size):
# Convolution layer
filter_shape = [filter_size, embedding_size, 1, num_filters]
W = tf.Variable(tf.truncated_normal(filter_shape, stddev=0.1), name="W")
b = tf.Variable(tf.constant(0.1, shape=[num_filters]), name="b")
conv = tf.nn.conv2d(
self.embedded_chars_expended,
W,
strides=[1,1,1,1],
padding="VALID",
name="conv")
# Apply nonlinearity
h = tf.nn.relu(tf.nn.bias_add(conv, b), name = "relu")
# Maxpooling over the outputs
pooled = tf.nn.max_pool(
h,
ksize=[1, sequence_length - filter_size + 1, 1, 1],
strides=[1,1,1,1],
padding="VALID",
name="pool")
pooled_outputs.append(pooled)
# Combine all the pooled features
num_filters_total = num_filters * len(filter_sizes)
self.h_pool = tf.concat(pooled_outputs, 3)
self.h_pool_flat = tf.reshape(self.h_pool, [-1, num_filters_total])
# Add dropout
with tf.name_scope("dropout"):
self.h_drop = tf.nn.dropout(self.h_pool_flat, self.dropout_keep_prob)
# Final (unnomalized) scores and predictions
with tf.name_scope("output"):
W = tf.get_variable(
"W",
shape = [num_filters_total, num_classes],
initializer = tf.contrib.layers.xavier_initializer())
b = tf.Variable(tf.constant(0.1, shape=[num_classes], name = "b"))
l2_loss += tf.nn.l2_loss(W)
l2_loss += tf.nn.l2_loss(b)
self.scores = tf.nn.xw_plus_b(self.h_drop, W, b, name = "scores")
self.predictions = tf.argmax(self.scores, 1, name = "predictions")
predictions = self.predictions
# Calculate Mean cross-entropy loss
with tf.name_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits(logits = self.scores, labels = self.input_y)
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * l2_loss
# Accuracy
with tf.name_scope("accuracy"):
correct_predictions = tf.equal(self.predictions, tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions, "float"), name = "accuracy")
actuals = tf.argmax(self.input_y, 1)
ones_like_actuals = tf.ones_like(actuals)
zeros_like_actuals = tf.zeros_like(actuals)
ones_like_predictions = tf.ones_like(self.predictions)
zeros_like_predictions = tf.zeros_like(self.predictions)
tp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, ones_like_actuals),
tf.equal(predictions, ones_like_predictions)
),
"float"
)
)
tn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, zeros_like_actuals),
tf.equal(predictions, zeros_like_predictions)
),
"float"
)
)
fp_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, zeros_like_actuals),
tf.equal(predictions, ones_like_predictions)
),
"float"
)
)
fn_op = tf.reduce_sum(
tf.cast(
tf.logical_and(
tf.equal(actuals, ones_like_actuals),
tf.equal(predictions, zeros_like_predictions)
),
"float"
)
)
tpr = tp_op/(tp_op + fn_op)
print(self.predictions)
print(self.predictions.shape)
print(tf.argmax(self.input_y, 1))
self.recall = tpr
self.f1_score = (2 * (self.accuracy * self.recall)) / (self.accuracy + self.recall)
def multihead_attention(queries, keys, num_units = None, num_heads = 8, dropout_rate = 0, is_training = True, causality = False, scope = "multihead_attention", reuse = None): ''' Implement multihead attention Args: queries: [Tensor], A 3-dimensions tensor with shape of [N, T_q, S_q] keys: [Tensor], A 3-dimensions tensor with shape of [N, T_k, S_k] num_units: [Int], Attention size num_heads: [Int], Number of heads dropout_rate: [Float], A ratio of dropout is_training: [Boolean], If true, controller of mechanism for dropout causality: [Boolean], If true, units that reference the future are masked scope: [String], Optional scope for "variable_scope" reuse: [Boolean], If to reuse the weights of a previous layer by the same name Returns: A 3-dimensions tensor with shape of [N, T_q, S] ''' with tf.variable_scope(scope, reuse = reuse): if num_units is None: # length of sentence num_units = queries.get_shape().as_list()[-1] # Linear layers in Figure 2(right) # shape = [N, T_q, S] Q = tf.layers.dense(queries, num_units, activation = tf.nn.relu) # shape = [N, T_k, S] K = tf.layers.dense(keys, num_units, activation = tf.nn.relu) # shape = [N, T_k, S] V = tf.layers.dense(keys, num_units, activation = tf.nn.relu) # Split and concat # shape = [N*h, T_q, S/h] Q_ = tf.concat(tf.split(Q, num_heads, axis = 2), axis = 0) # shape = [N*h, T_k, S/h] K_ = tf.concat(tf.split(K, num_heads, axis = 2), axis = 0) # shape = [N*h, T_k, S/h] V_ = tf.concat(tf.split(V, num_heads, axis = 2), axis = 0) # shape = [N*h, T_q, T_k] outputs = tf.matmul(Q_, tf.transpose(K_, [0, 2, 1])) # Scale outputs = outputs / (K_.get_shape().as_list()[-1] ** 0.5) # Masking # shape = [N, T_k] key_masks = tf.sign(tf.abs(tf.reduce_sum(keys, axis = -1))) # shape = [N*h, T_k] key_masks = tf.tile(key_masks, [num_heads, 1]) # shape = [N*h, T_q, T_k] key_masks = tf.tile(tf.expand_dims(key_masks, 1), [1, tf.shape(queries)[1], 1]) # If key_masks == 0 outputs = [1]*length(outputs) paddings = tf.ones_like(outputs) * (-math.pow(2, 32) + 1) # shape = [N*h, T_q, T_k] outputs = tf.where(tf.equal(key_masks, 0), paddings, outputs) if causality: # reduce dims : shape = [T_q, T_k] diag_vals = tf.ones_like(outputs[0, :, :]) # shape = [T_q, T_k] # use triangular matrix to ignore the affect from future words # like : [[1,0,0] # [1,2,0] # [1,2,3]] tril = tf.contrib.linalg.LinearOperatorTriL(diag_vals).to_dense() # shape = [N*h, T_q, T_k] masks = tf.tile(tf.expand_dims(tril, 0), [tf.shape(outputs)[0], 1, 1]) paddings = tf.ones_like(masks) * (-math.pow(2, 32) + 1) # shape = [N*h, T_q, T_k] outputs = tf.where(tf.equal(masks, 0), paddings, outputs) # Output Activation outputs = tf.nn.softmax(outputs) # Query Masking # shape = [N, T_q] query_masks = tf.sign(tf.abs(tf.reduce_sum(queries, axis = -1))) # shape = [N*h, T_q] query_masks = tf.tile(query_masks, [num_heads, 1]) # shape = [N*h, T_q, T_k] query_masks = tf.tile(tf.expand_dims(query_masks, -1), [1, 1, tf.shape(keys)[1]]) outputs *= query_masks # Dropouts outputs = tf.layers.dropout(outputs, rate = dropout_rate, training = tf.convert_to_tensor(is_training)) # Weighted sum # shape = [N*h, T_q, S/h] outputs = tf.matmul(outputs, V_) # Restore shape # shape = [N, T_q, S] outputs = tf.concat(tf.split(outputs, num_heads, axis = 0), axis = 2) # Residual connection outputs += queries # Normalize # shape = [N, T_q, S] outputs = normalize(outputs) return outputs
def __call__(self, inputVector, bhPhase=True, trainable=True):
print "priornet - " + self._nameScope
with tf.variable_scope(self._nameScope, reuse=self._reuse):
ratio = np.power(
float(self._outputDim) / float(self._inputDim),
1.0 / float(self._hiddenLayerNum))
layerDim = self._inputDim
print inputVector.shape
hidden = 2.0 * inputVector - 1.0
print "mean prior"
for i in range(self._hiddenLayerNum - 1):
layerDim = layerDim * ratio
hidden = tf.layers.dense(inputs=hidden,
units=int(layerDim),
activation=None,
use_bias=True,
trainable=self._trainable)
hidden = tf.layers.batch_normalization(
hidden, training=self._training, trainable=self._trainable)
hidden = tf.layers.dropout(hidden,
rate=0.5,
training=self._training)
if self._coreAct != None:
hidden = self._coreAct(hidden)
print hidden.shape
meanPrior = tf.layers.dense(inputs=hidden,
units=self._outputDim,
activation=None,
use_bias=True,
trainable=self._trainable)
if self._lastAct != None:
meanPrior = self._lastAct(meanPrior)
print meanPrior.shape
if self._constLogVar == None:
print "logVar prior"
layerDim = self._inputDim
print inputVector.shape
hidden = 2.0 * inputVector - 1.0
for i in range(self._hiddenLayerNum - 1):
layerDim = layerDim * ratio
hidden = tf.layers.dense(inputs=hidden,
units=int(layerDim),
activation=None,
use_bias=True,
trainable=self._trainable)
hidden = tf.layers.batch_normalization(
hidden,
training=self._training,
trainable=self._trainable)
hidden = tf.layers.dropout(hidden,
rate=0.5,
training=self._training)
if self._coreAct != None:
hidden = self._coreAct(hidden)
print hidden.shape
logVarPrior = tf.layers.dense(inputs=hidden,
units=self._outputDim,
activation=None,
use_bias=True,
trainable=self._trainable)
if self._lastAct != None:
logVarPrior = self._lastAct(logVarPrior)
print logVarPrior.shape
elif self._constLogVar == self._constLogVar:
print "logVar prior : constant " + str(self._constLogVar)
logVarPrior = self._constLogVar * tf.ones_like(meanPrior)
else:
logVarPrior = None
self._reuse = True
self.variables = tf.get_collection(tf.GraphKeys.GLOBAL_VARIABLES,
scope=self._nameScope)
self.update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS,
scope=self._nameScope)
self.saver = tf.train.Saver(var_list=self.variables)
return meanPrior, logVarPrior
def build_model(self):
if self.y_dim:
self.y = tf.placeholder(tf.float32, [self.batch_size, self.y_dim],
name='y')
if self.is_crop:
image_dims = [self.output_height, self.output_width, self.c_dim]
else:
image_dims = [self.input_height, self.input_width, self.c_dim]
self.inputs = tf.placeholder(tf.float32,
[self.batch_size] + image_dims,
name='real_images')
self.sample_inputs = tf.placeholder(tf.float32,
[self.sample_num] + image_dims,
name='sample_inputs')
inputs = self.inputs
sample_inputs = self.sample_inputs
'''
Possible way of change z's dimension
'''
self.z = tf.placeholder(tf.float32, [None, self.z_dim], name='z')
self.z_sum = histogram_summary("z", self.z)
if self.y_dim:
self.G = self.generator(self.z, self.y)
self.D, self.D_logits = self.discriminator(inputs, self.y)
self.sampler = self.sampler(self.z, self.y)
self.D_, self.D_logits_ = self.discriminator(self.G,
self.y,
reuse=True)
else:
self.G = self.generator(self.z)
self.D, self.D_logits = self.discriminator(inputs)
self.sampler = self.sampler(self.z)
self.D_, self.D_logits_ = self.discriminator(self.G, reuse=True)
self.d_sum = histogram_summary("d", self.D)
self.d__sum = histogram_summary("d_", self.D_)
self.G_sum = image_summary("G", self.G)
def sigmoid_cross_entropy_with_logits(x, y):
try:
return tf.nn.sigmoid_cross_entropy_with_logits(logits=x,
labels=y)
except:
return tf.nn.sigmoid_cross_entropy_with_logits(logits=x,
targets=y)
self.d_loss_real = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits,
tf.ones_like(self.D)))
self.d_loss_fake = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits_,
tf.zeros_like(self.D_)))
self.g_loss = tf.reduce_mean(
sigmoid_cross_entropy_with_logits(self.D_logits_,
tf.ones_like(self.D_)))
self.d_loss_real_sum = scalar_summary("d_loss_real", self.d_loss_real)
self.d_loss_fake_sum = scalar_summary("d_loss_fake", self.d_loss_fake)
self.d_loss = self.d_loss_real + self.d_loss_fake
self.g_loss_sum = scalar_summary("g_loss", self.g_loss)
self.d_loss_sum = scalar_summary("d_loss", self.d_loss)
t_vars = tf.trainable_variables()
self.d_vars = [var for var in t_vars if 'd_' in var.name]
self.g_vars = [var for var in t_vars if 'g_' in var.name]
# Wasserstein-GAN
# self.d_loss_real = tf.reduce_mean(self.D_logits)
# self.d_loss_fake = tf.reduce_mean(self.D_logits_)
# self.g_loss = -tf.reduce_mean(self.D_logits_)
# self.d_loss = self.d_loss_real - self.d_loss_fake
self.saver = tf.train.Saver()
def __init__(self, z_dim, h_dim, learning_rate, scale, generator_output_layer): self.z_dim = z_dim self.h_dim = h_dim self.g_net = Generator(z_dim, h_dim, generator_output_layer) self.d_net = Discriminator(h_dim) self.training = tf.placeholder(tf.bool, []) self.with_text = tf.placeholder(tf.float32, [None]) self.x = tf.placeholder(tf.float32, [None, 64, 64, 3]) self.x_w_ = tf.placeholder(tf.float32, [None, 64, 64, 3]) self.z = tf.placeholder(tf.float32, [None, self.z_dim]) # true h self.h = tf.placeholder(tf.float32, [None, h_dim]) # false h self.h_ = tf.placeholder(tf.float32, [None, h_dim]) # false image self.x_ = self.g_net(self.z, self.h, self.training) # true image, true h self.d = self.d_net(self.x, self.h, self.training, reuse=False) # fake image, true h self.d_ = self.d_net(self.x_, self.h, self.training) # wrong image, true h self.d_w_ = self.d_net(self.x_w_, self.h, self.training) # true image, false h self.d_h_ = self.d_net(self.x, self.h_, self.training) # self.g_loss = - tf.reduce_mean(self.d_) #+ tf.reduce_mean(tf.square(self.x - self.x_)) # self.d_loss = tf.reduce_mean(self.d) \ # - ( 1 * tf.reduce_mean(self.d_) + 1 * tf.reduce_mean(self.d_h_) + 1 * tf.reduce_mean(self.d_w_)) / (1 + 1 + 1) self.g_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=self.d_, labels=tf.ones_like(self.d_))) self.d_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=self.d, labels=tf.ones_like(self.d))) \ + (tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=self.d_, labels=tf.zeros_like(self.d_))) + \ tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=self.d_w_, labels=tf.zeros_like(self.d_w_))) +\ tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=self.d_h_, labels=tf.zeros_like(self.d_h_))) ) / 3 self.d_opt, self.g_opt = None, None with tf.control_dependencies(tf.get_collection(tf.GraphKeys.UPDATE_OPS)): self.d_opt = tf.train.AdamOptimizer(learning_rate=learning_rate, beta1=0.5, beta2=0.9)\ .minimize(self.d_loss, var_list=self.d_net.vars) self.g_opt = tf.train.AdamOptimizer(learning_rate=learning_rate, beta1=0.5, beta2=0.9)\ .minimize(self.g_loss, var_list=self.g_net.vars)
def loss_layer(self, feature_map_i, y_true, anchors):
'''
calc loss function from a certain scale
input:
feature_map_i: feature maps of a certain scale. shape: [N, 13, 13, 3*(5 + num_class)] etc.
y_true: y_ture from a certain scale. shape: [N, 13, 13, 3, 5 + num_class + 1] etc.
anchors: shape [9, 2]
'''
# size in [h, w] format! don't get messed up!
grid_size = tf.shape(feature_map_i)[1:3]
# the downscale ratio in height and weight
ratio = tf.cast(self.img_size / grid_size, tf.float32)
# N: batch_size
N = tf.cast(tf.shape(feature_map_i)[0], tf.float32)
x_y_offset, pred_boxes, pred_conf_logits, pred_prob_logits = self.reorg_layer(
feature_map_i, anchors)
###########
# get mask
###########
# shape: take 416x416 input image and 13*13 feature_map for example:
# [N, 13, 13, 3, 1]
object_mask = y_true[..., 4:5]
# the calculation of ignore mask if referred from
# https://github.com/pjreddie/darknet/blob/master/src/yolo_layer.c#L179
ignore_mask = tf.TensorArray(tf.float32, size=0, dynamic_size=True)
def loop_cond(idx, ignore_mask):
return tf.less(idx, tf.cast(N, tf.int32))
def loop_body(idx, ignore_mask):
# shape: [13, 13, 3, 4] & [13, 13, 3] ==> [V, 4]
# V: num of true gt box of each image in a batch
valid_true_boxes = tf.boolean_mask(
y_true[idx, ..., 0:4], tf.cast(object_mask[idx, ..., 0],
'bool'))
# shape: [13, 13, 3, 4] & [V, 4] ==> [13, 13, 3, V]
iou = self.box_iou(pred_boxes[idx], valid_true_boxes)
# shape: [13, 13, 3]
best_iou = tf.reduce_max(iou, axis=-1)
# shape: [13, 13, 3]
ignore_mask_tmp = tf.cast(best_iou < 0.5, tf.float32)
# finally will be shape: [N, 13, 13, 3]
ignore_mask = ignore_mask.write(idx, ignore_mask_tmp)
return idx + 1, ignore_mask
_, ignore_mask = tf.while_loop(cond=loop_cond,
body=loop_body,
loop_vars=[0, ignore_mask])
ignore_mask = ignore_mask.stack()
# shape: [N, 13, 13, 3, 1]
ignore_mask = tf.expand_dims(ignore_mask, -1)
# shape: [N, 13, 13, 3, 2]
pred_box_xy = pred_boxes[..., 0:2]
pred_box_wh = pred_boxes[..., 2:4]
# get xy coordinates in one cell from the feature_map
# numerical range: 0 ~ 1
# shape: [N, 13, 13, 3, 2]
true_xy = y_true[..., 0:2] / ratio[::-1] - x_y_offset
pred_xy = pred_box_xy / ratio[::-1] - x_y_offset
# get_tw_th
# numerical range: 0 ~ 1
# shape: [N, 13, 13, 3, 2]
true_tw_th = y_true[..., 2:4] / anchors
pred_tw_th = pred_box_wh / anchors
# for numerical stability
true_tw_th = tf.where(condition=tf.equal(true_tw_th, 0),
x=tf.ones_like(true_tw_th),
y=true_tw_th)
pred_tw_th = tf.where(condition=tf.equal(pred_tw_th, 0),
x=tf.ones_like(pred_tw_th),
y=pred_tw_th)
true_tw_th = tf.log(tf.clip_by_value(true_tw_th, 1e-9, 1e9))
pred_tw_th = tf.log(tf.clip_by_value(pred_tw_th, 1e-9, 1e9))
# box size punishment:
# box with smaller area has bigger weight. This is taken from the yolo darknet C source code.
# shape: [N, 13, 13, 3, 1]
box_loss_scale = 2. - (
y_true[..., 2:3] / tf.cast(self.img_size[1], tf.float32)) * (
y_true[..., 3:4] / tf.cast(self.img_size[0], tf.float32))
############
# loss_part
############
# mix_up weight
# [N, 13, 13, 3, 1]
mix_w = y_true[..., -1:]
# shape: [N, 13, 13, 3, 1]
xy_loss = tf.reduce_sum(
tf.square(true_xy - pred_xy) * object_mask * box_loss_scale *
mix_w) / N
wh_loss = tf.reduce_sum(
tf.square(true_tw_th - pred_tw_th) * object_mask * box_loss_scale *
mix_w) / N
# shape: [N, 13, 13, 3, 1]
conf_pos_mask = object_mask
conf_neg_mask = (1 - object_mask) * ignore_mask
conf_loss_pos = conf_pos_mask * tf.nn.sigmoid_cross_entropy_with_logits(
labels=object_mask, logits=pred_conf_logits)
conf_loss_neg = conf_neg_mask * tf.nn.sigmoid_cross_entropy_with_logits(
labels=object_mask, logits=pred_conf_logits)
# TODO: may need to balance the pos-neg by multiplying some weights
conf_loss = conf_loss_pos + conf_loss_neg
if self.use_focal_loss:
alpha = 1.0
gamma = 2.0
# TODO: alpha should be a mask array if needed
focal_mask = alpha * tf.pow(
tf.abs(object_mask - tf.sigmoid(pred_conf_logits)), gamma)
conf_loss *= focal_mask
conf_loss = tf.reduce_sum(conf_loss * mix_w) / N
# shape: [N, 13, 13, 3, 1]
# whether to use label smooth
if self.use_label_smooth:
delta = 0.01
label_target = (
1 - delta) * y_true[..., 5:-1] + delta * 1. / self.class_num
else:
label_target = y_true[..., 5:-1]
class_loss = object_mask * tf.nn.sigmoid_cross_entropy_with_logits(
labels=label_target, logits=pred_prob_logits) * mix_w
class_loss = tf.reduce_sum(class_loss) / N
return xy_loss, wh_loss, conf_loss, class_loss
def mask_attn_score(score, memory_sequence_length, score_mask_value=-1e8):
score_mask = tf.sequence_mask(memory_sequence_length,
maxlen=score.shape[1])
score_mask_values = score_mask_value * tf.ones_like(score)
return tf.where(score_mask, score, score_mask_values)
def masked_conv_v1(u,
filter_1,
filter_2,
mask_1,
mask_2,
conductivity_1,
conductivity_2,
eps=0.01,
filter_banks=None):
'''
convolution with two different kernels
:param u: input image
:param filter_1:
:param filter_2:
:param mask_1: region where filter_1 is applied, with value (0.5-eps,0.5+eps) on the boundary
:param mask_2: region where filter_2 is applied, with value (0.5-eps,0.5+eps) on the boundary
:param eps: some numerical consideration
:return:
'''
boundary_mask = tf.round(mask_1 + 0.1) + tf.round(mask_2 + 0.1) - 1
boundary_d_matrix = boundary_mask * (-8 / 3. *
(conductivity_1 + conductivity_2) /
2.)
mat1_d_matrix = tf.round(mask_1 - 0.1) * (-8 / 3. * conductivity_1)
mat2_d_matrix = tf.round(mask_2 - 0.1) * (-8 / 3. * conductivity_2)
d_matrix = boundary_d_matrix + mat1_d_matrix + mat2_d_matrix
padded_input = tf.pad(
u * tf.round(mask_1 + eps), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_1 = tf.nn.conv2d(input=padded_input,
filter=filter_1,
strides=[1, 1, 1, 1],
padding='VALID')
padded_input = tf.pad(
u * tf.round(mask_2 + eps), [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_2 = tf.nn.conv2d(input=padded_input,
filter=filter_2,
strides=[1, 1, 1, 1],
padding='VALID')
res1 = output_1 * mask_1 + output_2 * mask_2
padded_input = tf.pad(
u * mask_1, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_1 = tf.nn.conv2d(input=padded_input,
filter=filter_1,
strides=[1, 1, 1, 1],
padding='VALID')
padded_input = tf.pad(
u * mask_2, [[0, 0], [1, 1], [1, 1], [0, 0]],
"SYMMETRIC") # convolution with symmetric padding at boundary
output_2 = tf.nn.conv2d(input=padded_input,
filter=filter_2,
strides=[1, 1, 1, 1],
padding='VALID')
res2 = output_1 + output_2
LU_u = res1 * (tf.round(mask_1) + tf.round(mask_2)) + \
res2 * (tf.ones_like(mask_1) - tf.round(mask_1) - tf.round(mask_2))
result = LU_u + (d_matrix * u)
tmp = {
'd_matrix': d_matrix,
'LU_u': LU_u,
'result': result,
}
return tmp
def _build_model(self):
# define some placeholders
self.real_data = tf.compat.v1.placeholder(tf.float32, [
self.batch_size, self.time_step, self.pitch_range,
self.input_c_dim + self.output_c_dim
],
name='real_A_and_B')
if self.model != 'base':
self.real_mixed = tf.compat.v1.placeholder(
tf.float32, [
self.batch_size, self.time_step, self.pitch_range,
self.input_c_dim
],
name='real_A_and_B_mixed')
self.real_A = self.real_data[:, :, :, :self.input_c_dim]
self.real_B = self.real_data[:, :, :,
self.input_c_dim:self.input_c_dim +
self.output_c_dim]
self.gaussian_noise = tf.compat.v1.placeholder(tf.float32, [
self.batch_size, self.time_step, self.pitch_range, self.input_c_dim
],
name='gaussian_noise')
# Generator: A - B - A
self.fake_B = self.generator(self.real_A,
self.options,
False,
name="generatorA2B")
self.fake_A_ = self.generator(self.fake_B,
self.options,
False,
name="generatorB2A")
# Generator: B - A - B
self.fake_A = self.generator(self.real_B,
self.options,
True,
name="generatorB2A")
self.fake_B_ = self.generator(self.fake_A,
self.options,
True,
name="generatorA2B")
# to binary
self.real_A_binary = to_binary(self.real_A, 0.5)
self.real_B_binary = to_binary(self.real_B, 0.5)
self.fake_A_binary = to_binary(self.fake_A, 0.5)
self.fake_B_binary = to_binary(self.fake_B, 0.5)
self.fake_A__binary = to_binary(self.fake_A_, 0.5)
self.fake_B__binary = to_binary(self.fake_B_, 0.5)
# Discriminator: Fake
self.DB_fake = self.discriminator(self.fake_B + self.gaussian_noise,
self.options,
reuse=False,
name="discriminatorB")
self.DA_fake = self.discriminator(self.fake_A + self.gaussian_noise,
self.options,
reuse=False,
name="discriminatorA")
# Discriminator: Real
self.DA_real = self.discriminator(self.real_A + self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorA")
self.DB_real = self.discriminator(self.real_B + self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorB")
self.fake_A_sample = tf.compat.v1.placeholder(tf.float32, [
self.batch_size, self.time_step, self.pitch_range, self.input_c_dim
],
name='fake_A_sample')
self.fake_B_sample = tf.compat.v1.placeholder(tf.float32, [
self.batch_size, self.time_step, self.pitch_range, self.input_c_dim
],
name='fake_B_sample')
self.DA_fake_sample = self.discriminator(self.fake_A_sample +
self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorA")
self.DB_fake_sample = self.discriminator(self.fake_B_sample +
self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorB")
if self.model != 'base':
# Discriminator: All
self.DA_real_all = self.discriminator(self.real_mixed +
self.gaussian_noise,
self.options,
reuse=False,
name="discriminatorA_all")
self.DA_fake_sample_all = self.discriminator(
self.fake_A_sample + self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorA_all")
self.DB_real_all = self.discriminator(self.real_mixed +
self.gaussian_noise,
self.options,
reuse=False,
name="discriminatorB_all")
self.DB_fake_sample_all = self.discriminator(
self.fake_B_sample + self.gaussian_noise,
self.options,
reuse=True,
name="discriminatorB_all")
# Generator loss
self.cycle_loss = self.L1_lambda * abs_criterion(self.real_A, self.fake_A_) \
+ self.L1_lambda * abs_criterion(self.real_B, self.fake_B_)
self.g_loss_a2b = self.criterionGAN(
self.DB_fake, tf.ones_like(self.DB_fake)) + self.cycle_loss
self.g_loss_b2a = self.criterionGAN(
self.DA_fake, tf.ones_like(self.DA_fake)) + self.cycle_loss
self.g_loss = self.g_loss_a2b + self.g_loss_b2a - self.cycle_loss
# Discriminator loss
self.db_loss_real = self.criterionGAN(self.DB_real,
tf.ones_like(self.DB_real))
self.db_loss_fake = self.criterionGAN(
self.DB_fake_sample, tf.zeros_like(self.DB_fake_sample))
self.db_loss = (self.db_loss_real + self.db_loss_fake) / 2
self.da_loss_real = self.criterionGAN(self.DA_real,
tf.ones_like(self.DA_real))
self.da_loss_fake = self.criterionGAN(
self.DA_fake_sample, tf.zeros_like(self.DA_fake_sample))
self.da_loss = (self.da_loss_real + self.da_loss_fake) / 2
self.d_loss = self.da_loss + self.db_loss
if self.model != 'base':
self.db_all_loss_real = self.criterionGAN(
self.DB_real_all, tf.ones_like(self.DB_real_all))
self.db_all_loss_fake = self.criterionGAN(
self.DB_fake_sample_all,
tf.zeros_like(self.DB_fake_sample_all))
self.db_all_loss = (self.db_all_loss_real +
self.db_all_loss_fake) / 2
self.da_all_loss_real = self.criterionGAN(
self.DA_real_all, tf.ones_like(self.DA_real_all))
self.da_all_loss_fake = self.criterionGAN(
self.DA_fake_sample_all,
tf.zeros_like(self.DA_fake_sample_all))
self.da_all_loss = (self.da_all_loss_real +
self.da_all_loss_fake) / 2
self.d_all_loss = self.da_all_loss + self.db_all_loss
self.D_loss = self.d_loss + self.gamma * self.d_all_loss
# Define all summaries
self.g_loss_a2b_sum = tf.compat.v1.summary.scalar(
"g_loss_a2b", self.g_loss_a2b)
self.g_loss_b2a_sum = tf.compat.v1.summary.scalar(
"g_loss_b2a", self.g_loss_b2a)
self.g_loss_sum = tf.compat.v1.summary.scalar("g_loss", self.g_loss)
self.cycle_loss_sum = tf.compat.v1.summary.scalar(
"cycle_loss", self.cycle_loss)
self.g_sum = tf.compat.v1.summary.merge([
self.g_loss_a2b_sum, self.g_loss_b2a_sum, self.g_loss_sum,
self.cycle_loss_sum
])
self.db_loss_sum = tf.compat.v1.summary.scalar("db_loss", self.db_loss)
self.da_loss_sum = tf.compat.v1.summary.scalar("da_loss", self.da_loss)
self.d_loss_sum = tf.compat.v1.summary.scalar("d_loss", self.d_loss)
self.db_loss_real_sum = tf.compat.v1.summary.scalar(
"db_loss_real", self.db_loss_real)
self.db_loss_fake_sum = tf.compat.v1.summary.scalar(
"db_loss_fake", self.db_loss_fake)
self.da_loss_real_sum = tf.compat.v1.summary.scalar(
"da_loss_real", self.da_loss_real)
self.da_loss_fake_sum = tf.compat.v1.summary.scalar(
"da_loss_fake", self.da_loss_fake)
if self.model != 'base':
self.d_all_loss_sum = tf.compat.v1.summary.scalar(
"d_all_loss", self.d_all_loss)
self.D_loss_sum = tf.compat.v1.summary.scalar(
"D_loss", self.d_loss)
self.d_sum = tf.compat.v1.summary.merge([
self.da_loss_sum, self.da_loss_real_sum, self.da_loss_fake_sum,
self.db_loss_sum, self.db_loss_real_sum, self.db_loss_fake_sum,
self.d_loss_sum, self.d_all_loss_sum, self.D_loss_sum
])
else:
self.d_sum = tf.compat.v1.summary.merge([
self.da_loss_sum, self.da_loss_real_sum, self.da_loss_fake_sum,
self.db_loss_sum, self.db_loss_real_sum, self.db_loss_fake_sum,
self.d_loss_sum
])
# Test
self.test_A = tf.compat.v1.placeholder(
tf.float32,
[None, self.time_step, self.pitch_range, self.input_c_dim],
name='test_A')
self.test_B = tf.compat.v1.placeholder(
tf.float32,
[None, self.time_step, self.pitch_range, self.output_c_dim],
name='test_B')
# A - B - A
self.testB = self.generator(self.test_A,
self.options,
True,
name="generatorA2B")
self.testA_ = self.generator(self.testB,
self.options,
True,
name='generatorB2A')
# B - A - B
self.testA = self.generator(self.test_B,
self.options,
True,
name="generatorB2A")
self.testB_ = self.generator(self.testA,
self.options,
True,
name='generatorA2B')
# to binary
self.test_A_binary = to_binary(self.test_A, 0.5)
self.test_B_binary = to_binary(self.test_B, 0.5)
self.testA_binary = to_binary(self.testA, 0.5)
self.testB_binary = to_binary(self.testB, 0.5)
self.testA__binary = to_binary(self.testA_, 0.5)
self.testB__binary = to_binary(self.testB_, 0.5)
t_vars = tf.compat.v1.trainable_variables()
self.d_vars = [var for var in t_vars if 'discriminator' in var.name]
self.g_vars = [var for var in t_vars if 'generator' in var.name]
for var in t_vars:
print(var.name)
def _apply_transposed(self, is_train, x):
w_init = get_keras_initialization(self.w_init)
r_init = None if self.recurrent_init is None else get_keras_initialization(
self.recurrent_init)
x_size = x.shape.as_list()[-1]
if x_size is None:
raise ValueError("Last dimension must be defined (have shape %s)" %
str(x.shape))
if self._kind == "GRU":
cell = cudnn_rnn_ops.CudnnGRU(self.n_layers,
self.n_units,
x_size,
input_mode="linear_input")
elif self._kind == "LSTM":
cell = cudnn_rnn_ops.CudnnLSTM(self.n_layers,
self.n_units,
x_size,
input_mode="linear_input")
else:
raise ValueError()
n_params = cell.params_size().eval()
weights, biases = cell.params_to_canonical(tf.zeros([n_params]))
def init(shape, dtype=None, partition_info=None):
# This a bit hacky, since the api for these models is akward. We have to compute the shape of
# the weights / biases by calling `cell.params_to_canonical` with a unused tensor, and then
# use .eval() to actually get the shape. Then we can apply the user-requested initialzers
if self._kind == "LSTM":
is_recurrent = [
False, False, False, False, True, True, True, True
]
is_forget_bias = [
False, True, False, False, False, True, False, False
]
else:
is_recurrent = [False, False, False, True, True, True]
is_forget_bias = [False] * 6
init_biases = [
tf.constant(self.lstm_bias / 2.0, tf.float32,
(self.n_units, )) if z else tf.zeros(self.n_units)
for z in is_forget_bias
]
init_weights = []
for w, r in zip(weights, is_recurrent):
if r and r_init is not None:
init_weights.append(
tf.reshape(
r_init((self.n_units, self.n_units), w.dtype),
tf.shape(w)))
else:
init_weights.append(w_init(tf.shape(w).eval(), w.dtype))
out = cell.canonical_to_params(init_weights, init_biases)
out.set_shape((n_params, ))
return out
parameters = tf.get_variable("gru_parameters",
n_params,
tf.float32,
initializer=init)
if self.keep_recurrent < 1:
# Not super well test, try to figure out which indices in `parameters` are recurrent weights and drop them
# this is implementing drop-connect for the recurrent weights
is_recurrent = weights[:len(weights) // 2] + [
tf.ones_like(w) for w in weights[len(weights) // 2:]
]
recurrent_mask = cell.canonical_to_params(
is_recurrent, biases) # ones at recurrent weights
recurrent_mask = 1 - recurrent_mask * (
1 - self.keep_recurrent
) # ones are non-recurrent param, keep_prob elsewhere
parameters = tf.cond(
is_train, lambda: tf.floor(
tf.random_uniform(
(n_params, )) + recurrent_mask) * parameters,
lambda: parameters)
if self._kind == "LSTM":
if self.learn_initial_states:
raise NotImplementedError()
else:
initial_state_h = tf.zeros(
(self.n_layers, tf.shape(x)[1], self.n_units), tf.float32)
initial_state_c = tf.zeros(
(self.n_layers, tf.shape(x)[1], self.n_units), tf.float32)
out = cell(x, initial_state_h, initial_state_c, parameters, True)
else:
if self.learn_initial_states:
initial_state = tf.get_variable("initial_state", self.n_units,
tf.float32,
tf.zeros_initializer())
initial_state = tf.tile(
tf.expand_dims(tf.expand_dims(initial_state, 0), 0),
[self.n_layers, tf.shape(x)[1], 1])
else:
initial_state = tf.zeros(
(self.n_layers, tf.shape(x)[1], self.n_units), tf.float32)
out = cell(x, initial_state, parameters, True)
return out
def main(layers):
np.random.seed(seed)
tf.set_random_seed(seed)
# We load the original dataset
data = np.load(original_file)
# =========================================================================
# Parameters of the complete system
# =========================================================================
# We obtain the features and the targets
X = data[ :, range(data.shape[ 1 ] - 1) ]
y = data[ :, data.shape[ 1 ] - 1 ]
data_size = X.shape[ 0 ]
size_train = data_size - n_size_test
total_training_data = size_train
X_train = X[0 : size_train, : ]
y_train = np.vstack(y[ 0 : size_train ])
X_test = X[size_train : data_size, : ]
y_test = np.vstack(y[ size_train : data_size ])
# Normalize the values
meanXTrain = np.mean(X_train, axis = 0)
stdXTrain = np.std(X_train, axis = 0)
meanyTrain = np.mean(y_train)
stdyTrain = np.std(y_train)
X_train = (X_train - meanXTrain) / stdXTrain
y_train = (y_train - meanyTrain) / stdyTrain
X_test = (X_test - meanXTrain) / stdXTrain
std_targets = stdyTrain
mean_targets = meanyTrain
# Create the model
dim_data = X_train.shape[ 1 ]
# Placeholders for data and number of samples
x = tf.placeholder(tf.float32, [ None, dim_data ])
y_ = tf.placeholder(tf.float32, [ None, 1 ])
n_samples = tf.placeholder(tf.int32, [ 1 ])[ 0 ]
n_layers_nn = n_layers_gen = n_layers_disc = layers
if n_layers_nn == 2:
total_weights = n_units_nn * (dim_data + n_units_nn) + n_units_nn # Number of weights for the 2 hidden layers case
else:
total_weights = (dim_data + 1) * n_units_nn # Total number of weights used
generator = create_generator(n_units_gen, noise_comps_gen, total_weights, n_layers_gen)
discriminator = create_discriminator(n_units_disc, total_weights, n_layers_disc)
main_NN = create_main_NN(n_units_nn, n_layers_nn)
weights = compute_output_generator(generator, tf.shape(x)[ 0 ], n_samples, noise_comps_gen)
# Obtain the moments of the weights and pass the values through the disc
mean_w , var_w = tf.nn.moments(weights, axes = [0, 1])
mean_w = tf.stop_gradient(mean_w)
var_w = tf.stop_gradient(var_w)
# Normalize real weights
norm_weights = (weights - mean_w) / tf.sqrt(var_w)
# Generate samples of a normal distribution with the moments of the weights
w_gaussian = tf.random_normal(shape = tf.shape(weights), mean = 0, stddev = 1, seed = seed)
# Obtain the T(z,x) for the real and the sampled weights
T_real = compute_output_discriminator(discriminator, norm_weights, layers)
T_sampled = compute_output_discriminator(discriminator, w_gaussian, layers)
# Calculate the cross entropy loss for the discriminator
d_loss_real = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=T_real, labels=tf.ones_like(T_real)))
d_loss_sampled = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=T_sampled, labels=tf.zeros_like(T_sampled)))
cross_entropy_per_point = (d_loss_real + d_loss_sampled) / 2.0
# Obtain the KL and ELBO
logr = -0.5 * tf.reduce_sum(norm_weights**2 + tf.log(var_w) + np.log(2.0 * np.pi), [ 2 ])
logz = -0.5 * tf.reduce_sum((weights)**2 / tf.exp(main_NN['log_vars_prior']) + main_NN['log_vars_prior'] + np.log(2.0 * np.pi), [ 2 ])
KL = T_real + logr - logz
res_train, error, log_prob_data, results_mean, results_std = compute_outputs_main_NN(main_NN, x, y_, mean_targets, std_targets, weights, \
n_samples, dim_data)
# Make the estimates of the ELBO for the primary classifier
ELBO = (tf.reduce_sum(res_train) - tf.reduce_mean(KL) * tf.cast(tf.shape(x)[ 0 ], tf.float32) / \
tf.cast(total_training_data, tf.float32)) * tf.cast(total_training_data, tf.float32) / tf.cast(tf.shape(x)[ 0 ], tf.float32)
neg_ELBO = -ELBO
main_loss = neg_ELBO
mean_ELBO = ELBO
# KL y res_train have shape batch_size x n_samples
mean_KL = tf.reduce_mean(KL)
# Create the variable lists to be updated
vars_primal = get_variables_generator(generator) + get_variables_main_NN(main_NN)
vars_dual = get_variables_discriminator(discriminator)
train_step_primal = tf.train.AdamOptimizer(primal_rate).minimize(main_loss, var_list = vars_primal)
train_step_dual = tf.train.AdamOptimizer(dual_rate).minimize(cross_entropy_per_point, var_list = vars_dual)
config = tf.ConfigProto(intra_op_parallelism_threads=1, inter_op_parallelism_threads=1, \
allow_soft_placement=True, device_count = {'CPU': 1})
with tf.Session(config = config) as sess:
sess.run(tf.global_variables_initializer())
total_ini = time.time()
# Change the value of alpha to begin exploring using the second value given
for epoch in range(n_epochs):
L = 0.0
ce_estimate = 0.0
kl = 0.0
for i_batch in range(int(np.ceil(size_train / n_batch))):
ini = time.clock()
ini_ref = time.time()
ini_train = time.clock()
last_point = np.minimum(n_batch * (i_batch + 1), size_train)
batch = [ X_train[ i_batch * n_batch : last_point, : ] , y_train[ i_batch * n_batch : last_point, ] ]
sess.run(train_step_dual, feed_dict={x: batch[ 0 ], y_: batch[ 1 ], n_samples: n_samples_train})
sess.run(train_step_primal, feed_dict={x: batch[ 0 ], y_: batch[ 1 ], n_samples: n_samples_train})
L_tmp, kl_tmp, ce_estimate_tmp = sess.run([ mean_ELBO, mean_KL, cross_entropy_per_point] , feed_dict={x: batch[ 0 ], y_: batch[ 1 ], n_samples: n_samples_train})
L += L_tmp
kl += kl_tmp
ce_estimate += ce_estimate_tmp
fini_train = time.clock()
if i_batch % n_batches_to_report == 0 and not (i_batch == 0 and epoch == 0):
sys.stdout.write('\n')
ini_test = time.time()
###################################################
# CRPS by the ensemble method for each test value #
###################################################
# crps_raw = np.empty(len(labels))
# for i in range(len(labels)): crps_raw[i] = crps_ensemble(labels[i,0], results[i,:])
# mean_crps_ensemble = np.mean(crps_raw)
# np.savetxt('results_AADM/' + str(alpha) + 'raw_CRPS_' + str(split) + ".txt", crps_raw)
# np.savetxt('results_AADM/' + str(alpha) + 'mean_CRPS_' + str(split) + ".txt", [ mean_crps ])
###########################################
# Exact CRPS for the mixture of gaussians #
###########################################
# np.savetxt('results_AADM/' + str(alpha) + 'raw_exact_CRPS_' + str(split) + ".txt", crps_exact)
# np.savetxt('results_AADM/' + str(alpha) + 'mean_exact_CRPS_' + str(split) + ".txt", [ mean_crps_exact ])
# We do the test evaluation for the error metrics
SE = 0.0
LL = 0.0
mean_crps_exact = 0.0
n_batches_to_process = int(np.ceil(X_test.shape[ 0 ] / n_batch))
for i in range(n_batches_to_process):
last_point = np.minimum(n_batch * (i + 1), X_test.shape[ 0 ])
batch = [ X_test[ i * n_batch : last_point, : ] , y_test[ i * n_batch : last_point, ] ]
SE_tmp, LL_tmp, labels, res_mean, res_std = sess.run([ error, log_prob_data, y_, results_mean, results_std ], \
feed_dict={x: batch[0], y_: batch[1], n_samples: n_samples_test})
SE += SE_tmp
LL += LL_tmp
# Exact CRPS
shape_quad = res_mean.shape
res_var = res_std ** 2
crps_exact = np.empty([ shape_quad[0] ])
for i in range(shape_quad[0]):
means_vec = res_mean[i, :]
vars_vec = res_var[i, :]
means_diff = np.empty([shape_quad[1], shape_quad[1]])
vars_sum = np.empty([shape_quad[1], shape_quad[1]])
ru, cu = np.triu_indices(means_vec.size,1)
rl, cl = np.tril_indices(means_vec.size,1)
means_diff[ru, cu] = means_vec[ru] - means_vec[cu]
means_diff[rl, cl] = means_vec[rl] - means_vec[cl]
vars_sum[ru, cu] = vars_vec[ru] + vars_vec[cu]
vars_sum[rl, cl] = vars_vec[rl] + vars_vec[cl]
# Term only depending on the means and vars
fixed_term = 1 / 2 * np.mean(aux_crps(means_diff, vars_sum))
# Term that depends on the real value of the data
dev_mean = labels[i, 0] - means_vec
data_term = np.mean(aux_crps(dev_mean, vars_vec))
crps_exact[i] = data_term - fixed_term
mean_crps_exact += np.mean(crps_exact)
RMSE = np.sqrt(SE / float(X_test.shape[ 0 ]))
TestLL = (LL / float(X_test.shape[ 0 ]))
mean_CRPS = (mean_crps_exact / float(X_test.shape[ 0 ]) )
fini_test = time.time()
fini = time.clock()
fini_ref = time.time()
total_fini = time.time()
with open("results_AADM_airlines/res_avb_airlines.txt", "a") as res_file:
string = ('AVB batch %g datetime %s epoch %d ELBO %g CROSS-ENT %g KL %g real_time %g cpu_time %g ' + \
'train_time %g test_time %g total_time %g LL %g RMSE %g CRPS_exact %g ') % (i_batch, str(datetime.now()), epoch, \
L / n_batches_to_report, ce_estimate / n_batches_to_report, kl / n_batches_to_report, (fini_ref - \
ini_ref), (fini - ini), (fini_train - ini_train), (fini_test - ini_test), (total_fini - total_ini), TestLL, \
RMSE, mean_CRPS)
res_file.write(string + "\n")
print(string)
sys.stdout.flush()
L = 0.0
ce_estimate = 0.0
kl = 0.0
def custom_loss(y_true, y_pred):
mask_shape = tf.shape(y_true)[:4]
cell_x = tf.to_float(
tf.reshape(tf.tile(tf.range(GRID_W), [GRID_H]),
(1, GRID_H, GRID_W, 1, 1)))
cell_y = tf.transpose(cell_x, (0, 2, 1, 3, 4))
cell_grid = tf.tile(tf.concat([cell_x, cell_y], -1),
[BATCH_SIZE, 1, 1, 5, 1])
coord_mask = tf.zeros(mask_shape)
conf_mask = tf.zeros(mask_shape)
class_mask = tf.zeros(mask_shape)
seen = tf.Variable(0.)
total_AP = tf.Variable(0.)
"""
Adjust prediction
"""
### adjust x and y
pred_box_xy = tf.sigmoid(y_pred[..., :2]) + cell_grid
### adjust w and h
pred_box_wh = tf.exp(y_pred[..., 2:4]) * np.reshape(
ANCHORS, [1, 1, 1, BOX, 2])
### adjust confidence
pred_box_conf = tf.sigmoid(y_pred[..., 4])
### adjust class probabilities
pred_box_class = y_pred[..., 5:]
"""
Adjust ground truth
"""
### adjust x and y
true_box_xy = y_true[..., 0:2] # relative position to the containing cell
### adjust w and h
true_box_wh = y_true[
..., 2:4] # number of cells accross, horizontally and vertically
### adjust confidence
true_wh_half = true_box_wh / 2.
true_mins = true_box_xy - true_wh_half
true_maxes = true_box_xy + true_wh_half
pred_wh_half = pred_box_wh / 2.
pred_mins = pred_box_xy - pred_wh_half
pred_maxes = pred_box_xy + pred_wh_half
intersect_mins = tf.maximum(pred_mins, true_mins)
intersect_maxes = tf.minimum(pred_maxes, true_maxes)
intersect_wh = tf.maximum(intersect_maxes - intersect_mins, 0.)
intersect_areas = intersect_wh[..., 0] * intersect_wh[..., 1]
true_areas = true_box_wh[..., 0] * true_box_wh[..., 1]
pred_areas = pred_box_wh[..., 0] * pred_box_wh[..., 1]
union_areas = pred_areas + true_areas - intersect_areas
iou_scores = tf.truediv(intersect_areas, union_areas)
true_box_conf = iou_scores * y_true[..., 4]
### adjust class probabilities
true_box_class = tf.to_int32(y_true[..., 5])
"""
Determine the masks
"""
### coordinate mask: simply the position of the ground truth boxes (the predictors)
coord_mask = tf.expand_dims(y_true[..., 4], axis=-1) * COORD_SCALE
### confidence mask: penelize predictors + penalize boxes with low IOU
# penalize the confidence of the boxes, which have IOU with some ground truth box < 0.6
true_xy = true_boxes[..., 0:2]
true_wh = true_boxes[..., 2:4]
true_wh_half = true_wh / 2.
true_mins = true_xy - true_wh_half
true_maxes = true_xy + true_wh_half
pred_xy = tf.expand_dims(pred_box_xy, 4)
pred_wh = tf.expand_dims(pred_box_wh, 4)
pred_wh_half = pred_wh / 2.
pred_mins = pred_xy - pred_wh_half
pred_maxes = pred_xy + pred_wh_half
intersect_mins = tf.maximum(pred_mins, true_mins)
intersect_maxes = tf.minimum(pred_maxes, true_maxes)
intersect_wh = tf.maximum(intersect_maxes - intersect_mins, 0.)
intersect_areas = intersect_wh[..., 0] * intersect_wh[..., 1]
true_areas = true_wh[..., 0] * true_wh[..., 1]
pred_areas = pred_wh[..., 0] * pred_wh[..., 1]
union_areas = pred_areas + true_areas - intersect_areas
iou_scores = tf.truediv(intersect_areas, union_areas)
best_ious = tf.reduce_max(iou_scores, axis=4)
conf_mask = conf_mask + tf.to_float(
best_ious < 0.6) * (1 - y_true[..., 4]) * NO_OBJECT_SCALE
# penalize the confidence of the boxes, which are reponsible for corresponding ground truth box
conf_mask = conf_mask + y_true[..., 4] * OBJECT_SCALE
### class mask: simply the position of the ground truth boxes (the predictors)
class_mask = y_true[..., 4] * tf.gather(CLASS_WEIGHTS,
true_box_class) * CLASS_SCALE
"""
Warm-up training
"""
no_boxes_mask = tf.to_float(coord_mask < COORD_SCALE / 2.)
seen = tf.assign_add(seen, 1.)
true_box_xy, true_box_wh, coord_mask = tf.cond(
tf.less(seen, WARM_UP_BATCHES), lambda: [
true_box_xy + (0.5 + cell_grid) * no_boxes_mask,
true_box_wh + tf.ones_like(true_box_wh) * np.reshape(
ANCHORS, [1, 1, 1, BOX, 2]) * no_boxes_mask,
tf.ones_like(coord_mask)
], lambda: [true_box_xy, true_box_wh, coord_mask])
"""
Finalize the loss
"""
nb_coord_box = tf.reduce_sum(tf.to_float(coord_mask > 0.0))
nb_conf_box = tf.reduce_sum(tf.to_float(conf_mask > 0.0))
nb_class_box = tf.reduce_sum(tf.to_float(class_mask > 0.0))
loss_xy = tf.reduce_sum(tf.square(true_box_xy - pred_box_xy) *
coord_mask) / (nb_coord_box + 1e-6) / 2.
loss_wh = tf.reduce_sum(tf.square(true_box_wh - pred_box_wh) *
coord_mask) / (nb_coord_box + 1e-6) / 2.
loss_conf = tf.reduce_sum(
tf.square(true_box_conf - pred_box_conf) * conf_mask) / (nb_conf_box +
1e-6) / 2.
loss_class = tf.nn.sparse_softmax_cross_entropy_with_logits(
labels=true_box_class, logits=pred_box_class)
loss_class = tf.reduce_sum(loss_class * class_mask) / (nb_class_box + 1e-6)
loss = loss_xy + loss_wh + loss_conf + loss_class
# nb_true_box = tf.reduce_sum(y_true[..., 4])
# nb_pred_box = tf.reduce_sum(tf.to_float(true_box_conf > 0.5))
# total_AP = tf.assign_add(total_AP, nb_pred_box/nb_true_box)
# loss = tf.Print(loss, [loss_xy, loss_wh, loss_conf, loss_class, loss, total_AP/seen], message='DEBUG', summarize=1000)
return loss
def symbols_to_logits_fn(ids, i, cache):
"""Generate logits for next potential IDs.
Args:
ids: Current decoded sequences. int tensor with shape [batch_size *
beam_size, i + 1].
i: Loop index.
cache: dictionary of values storing the encoder output, encoder-decoder
attention bias, and previous decoder attention values.
Returns:
Tuple of
(logits with shape [batch_size * beam_size, vocab_size],
updated cache values)
"""
# Set decoder input to the last generated IDs
decoder_input = ids[:, -1:]
# Preprocess decoder input by getting embeddings and adding timing signal.
# decoder_input = self.embedding_softmax_layer(decoder_input)
source_decoder_input = decoder_input
decoder_input = self.embedding_lookup(decoder_input)
embedding_mask = tf.cast(tf.not_equal(source_decoder_input, 0),
self.embedding_lookup.embeddings.dtype)
decoder_input *= tf.expand_dims(embedding_mask, -1)
if self._padded_decode:
timing_signal_shape = timing_signal.shape.as_list()
decoder_input += tf.slice(timing_signal, [i, 0],
[1, timing_signal_shape[1]])
bias_shape = decoder_self_attention_bias.shape.as_list()
self_attention_bias = tf.slice(
decoder_self_attention_bias, [0, 0, i, 0],
[bias_shape[0], bias_shape[1], 1, bias_shape[3]])
else:
decoder_input += timing_signal[i:i + 1]
self_attention_bias = decoder_self_attention_bias[:, :, i:i +
1, :i + 1]
decoder_shape = tf_utils.get_shape_list(decoder_input,
expected_rank=3)
batch_size = decoder_shape[0]
decoder_length = decoder_shape[1]
attention_bias = cache.get("encoder_decoder_attention_bias")
attention_bias = tf.where(attention_bias < 0,
tf.zeros_like(attention_bias),
tf.ones_like(attention_bias))
attention_bias = tf.squeeze(attention_bias, axis=[1])
attention_mask = tf.tile(attention_bias, [1, decoder_length, 1])
self_attention_bias = tf.where(self_attention_bias < 0,
tf.zeros_like(self_attention_bias),
tf.ones_like(self_attention_bias))
self_attention_bias = tf.squeeze(self_attention_bias, axis=[1])
self_attention_mask = tf.tile(self_attention_bias,
[batch_size, 1, 1])
decoder_outputs = self.decoder_layer(
decoder_input,
cache.get("encoder_outputs"),
memory_mask=self_attention_mask,
target_mask=attention_mask,
cache=cache,
decode_loop_step=i if self._padded_decode else None)
logits = self._embedding_linear(self.embedding_lookup.embeddings,
decoder_outputs)
logits = tf.squeeze(logits, axis=[1])
return logits, cache
print("---------00000000000000000-----")
# use 2.0.8 keara, otherwise, get_session() will fail due to graph is empty. don't know why.
session = keras.backend.get_session()
print("---------1111111111111111111111111111--------")
print(device_A + ",,,,,,," + device_B)
with tf.device(device_A):
ipa = tf.placeholder(dtype=tf.float32, shape=(None, 1))
ip1 = tf.placeholder(dtype=tf.float32, shape=(None, None, None, 1))
ip3 = tf.placeholder(dtype=tf.float32, shape=(None, None, None, 3))
ip4 = tf.placeholder(dtype=tf.float32, shape=(None, None, None, 4))
ip3x = tf.placeholder(dtype=tf.float32, shape=(None, None, None, 3))
baby = load_model('baby.net')
baby_place = tf.concat([- 512 * tf.ones_like(ip4[:, :, :, 3:4]), 128 * tf.ones_like(ip4[:, :, :, 3:4]), 128 * tf.ones_like(ip4[:, :, :, 3:4])], axis=3)
baby_yuv = RGB2YUV(ip4[:, :, :, 0:3])
baby_alpha = tf.where(x=tf.zeros_like(ip4[:, :, :, 3:4]), y=tf.ones_like(ip4[:, :, :, 3:4]), condition=tf.less(ip4[:, :, :, 3:4], 128))
baby_hint = baby_alpha * baby_yuv + (1 - baby_alpha) * baby_place
baby_op = YUV2RGB(baby(tf.concat([ip1, baby_hint], axis=3)))
baby_finder = tf.add(baby_op, baby_op, name="baby_finder")
girder = load_model('girder.net')
gird_op = (1 - girder([1 - ip1 / 255.0, ip4, 1 - ip3 / 255.0])) * 255.0
gird_finder = tf.add(gird_op, gird_op, name="gird_finder")
reader = load_model('reader.net')
features = reader(ip3 / 255.0)
featuresx = reader(ip3x / 255.0)
head = load_model('head.net')
def main(argv=None):
import os
os.environ['CUDA_VISIBLE_DEVICES'] = FLAGS.gpu_list
try:
os.makedirs(FLAGS.output_dir)
except OSError as e:
if e.errno != 17:
raise
"""
if FLAGS.use_vacab and os.path.exists("./vocab.txt"):
bk_tree = BKTree(levenshtein, list_words('./vocab.txt'))
# bk_tree = bktree.Tree()
"""
with tf.get_default_graph().as_default():
input_images = tf.placeholder(tf.float32,
shape=[None, None, None, 3],
name='input_images')
input_feature_map = tf.placeholder(tf.float32,
shape=[None, None, None, 32],
name='input_feature_map')
input_transform_matrix = tf.placeholder(tf.float32,
shape=[None, 6],
name='input_transform_matrix')
input_box_mask = []
input_box_mask.append(tf.placeholder(tf.int32,
shape=[None],
name='input_box_masks_0'))
input_box_widths = tf.placeholder(tf.int32,
shape=[None],
name='input_box_widths')
input_seq_len = input_box_widths[tf.argmax(input_box_widths, 0)] * tf.ones_like(input_box_widths)
global_step = tf.get_variable('global_step',
[],
initializer=tf.constant_initializer(0),
trainable=False)
shared_feature, f_score, f_geometry = detect_part.model(input_images)
pad_rois = roi_rotate_part.roi_rotate_tensor_pad(input_feature_map,
input_transform_matrix,
input_box_mask,
input_box_widths)
recognition_logits = recognize_part.build_graph(pad_rois,
input_box_widths)
_, dense_decode = recognize_part.decode(recognition_logits,
input_box_widths)
variable_averages = tf.train.ExponentialMovingAverage(0.997, global_step)
saver = tf.train.Saver(variable_averages.variables_to_restore())
with tf.Session(config=tf.ConfigProto(allow_soft_placement=True)) as sess:
ckpt_state = tf.train.get_checkpoint_state(FLAGS.checkpoint_path)
model_path = os.path.join(FLAGS.checkpoint_path,
os.path.basename(ckpt_state.model_checkpoint_path))
print('Restore from {}'.format(model_path))
saver.restore(sess, model_path)
im_fn_list = get_images()
df = pd.DataFrame()
for iteration, im_fn in enumerate(im_fn_list):
if iteration%50 == 0: print(iteration,os.path.basename(im_fn).split('.')[0])
else : print(iteration,os.path.basename(im_fn).split('.')[0][-6:], end =" ")
im = cv2.imread(im_fn)[:, :, ::-1]
start_time = time.time()
im_resized, (ratio_h, ratio_w) = resize_image(im)
# im_resized_d, (ratio_h_d, ratio_w_d) = resize_image_detection(im)
timer = {'detect': 0, 'restore': 0, 'nms': 0, 'recog': 0}
start = time.time()
shared_feature_map, score, geometry = sess.run([shared_feature,
f_score,
f_geometry],
feed_dict={input_images: [im_resized]})
boxes, timer = detect(score_map=score,
geo_map=geometry,
timer=timer)
timer['detect'] = time.time() - start
start = time.time() # reset for recognition
if boxes is not None and boxes.shape[0] != 0:
res_file_path = os.path.join(FLAGS.output_dir,
'res_' + '{}.txt'.format(os.path.basename(im_fn).split('.')[0]))
input_roi_boxes = boxes[:, :8].reshape(-1, 8)
recog_decode_list = []
# Here avoid too many text area leading to OOM
for batch_index in range(input_roi_boxes.shape[0] // 32 + 1): # test roi batch size is 32
start_slice_index = batch_index * 32
end_slice_index = (batch_index + 1) * 32 if input_roi_boxes.shape[0] >= (batch_index + 1) * 32 else input_roi_boxes.shape[0]
tmp_roi_boxes = input_roi_boxes[start_slice_index:end_slice_index]
boxes_masks = [0] * tmp_roi_boxes.shape[0]
transform_matrixes, box_widths = get_project_matrix_and_width(tmp_roi_boxes)
# max_box_widths = max_width * np.ones(boxes_masks.shape[0]) # seq_len
# Run end to end
recog_decode = sess.run(dense_decode,
feed_dict={input_feature_map: shared_feature_map,
input_transform_matrix: transform_matrixes,
input_box_mask[0]: boxes_masks,
input_box_widths: box_widths})
recog_decode_list.extend([r for r in recog_decode])
timer['recog'] = time.time() - start
# Preparing for draw boxes
boxes = boxes[:, :8].reshape((-1, 4, 2))
boxes[:, :, 0] /= ratio_w
boxes[:, :, 1] /= ratio_h
if len(recog_decode_list) != boxes.shape[0]:
print("detection and recognition result are not equal!")
exit(-1)
with open(res_file_path, 'w') as f:
for i, box in enumerate(boxes):
# to avoid submitting errors
box = sort_poly(box.astype(np.int32))
if np.linalg.norm(box[0] - box[1]) < 5 or np.linalg.norm(box[3]-box[0]) < 5:
continue
recognition_result = ground_truth_to_word(recog_decode_list[i])
"""
if FLAGS.use_vacab:
fix_result = bktree_search(bk_tree, recognition_result.upper())
if len(fix_result) != 0:
recognition_result = fix_result[0][1]
"""
f.write('{},{},{},{},{},{},{},{},{},{}\r\n'.format(
#im_fn,
os.path.basename(im_fn).split('.')[0][-6:],
box[0, 0],
box[0, 1],
box[1, 0],
box[1, 1],
box[2, 0],
box[2, 1],
box[3, 0],
box[3, 1],
recognition_result
))
df = df.append({'f_name': os.path.basename(im_fn).split('.')[0][-6:],
'box_0_0': box[0, 0],
'box_0_1': box[0, 1],
'box_1_0': box[1, 0],
'box_1_1': box[1, 1],
'box_2_0': box[2, 0],
'box_2_1': box[2, 1],
'box_3_0': box[3, 0],
'box_3_1': box[3, 1],
'rec_txt': recognition_result},
ignore_index=True)
df.to_csv('/content/file1.csv')
#print(box.astype(np.int32).reshape((-1, 1, 2)))
# Draw bounding box
cv2.polylines(im[:, :, ::-1],
[box.astype(np.int32).reshape((-1, 1, 2))],
True,
color=(255, 255, 0),
thickness=1)
# Draw recognition results area
text_area = box.copy()
text_area[2, 1] = text_area[1, 1]
text_area[3, 1] = text_area[0, 1]
text_area[0, 1] = text_area[0, 1] - 15
text_area[1, 1] = text_area[1, 1] - 15
cv2.fillPoly(im[:, :, ::-1],
[text_area.astype(np.int32).reshape((-1, 1, 2))],
color=(0, 255, 0))
im_txt = cv2.putText(im[:, :, ::-1],
recognition_result,
(box[0, 0], box[0, 1]),
font,
0.5,
(0, 0, 255),
1)
else:
res_file = os.path.join(FLAGS.output_dir,
'res_' + '{}.txt'.format(
os.path.basename(im_fn).split('.')[0]))
f = open(res_file, "w")
im_txt = None
f.close()
#print('{} : detect {:.0f}ms, restore {:.0f}ms, nms {:.0f}ms, recog {:.0f}ms'.format(
# im_fn,
# timer['detect']*1000,
# timer['restore']*1000,
# timer['nms']*1000,
# timer['recog']*1000))
duration = time.time() - start_time
#print('[timing] {}'.format(duration))
if FLAGS.write_images:
img_path = os.path.join(FLAGS.output_dir,
os.path.basename(im_fn))
def multihead_attention(queries,
keys,
num_units=None,
num_heads=8,
dropout=0,
causality=False,
scope="multihead_attention",
reuse=None):
'''Applies multihead attention.
Args:
queries: A 3d tensor with shape of [N, T_q, C_q].
keys: A 3d tensor with shape of [N, T_k, C_k].
num_units: A scalar. Attention size.
dropout_rate: A floating point number.
is_training: Boolean. Controller of mechanism for dropout.
causality: Boolean. If true, units that reference the future are masked.
num_heads: An int. Number of heads.
scope: Optional scope for `variable_scope`.
reuse: Boolean, whether to reuse the weights of a previous layer
by the same name.
Returns
A 3d tensor with shape of (N, T_q, C)
'''
with tf.variable_scope(scope, reuse=reuse):
print("use multihead_attention")
# Set the fall back option for num_units
if num_units is None:
num_units = queries.get_shape().as_list()[-1]
# Linear projections
Q = tf.layers.dense(queries, num_units, activation=tf.nn.relu) # (N, T_q, C)
K = tf.layers.dense(keys, num_units, activation=tf.nn.relu) # (N, T_k, C)
V = tf.layers.dense(keys, num_units, activation=tf.nn.relu) # (N, T_k, C)
# Split and concat
Q_ = tf.concat(tf.split(Q, num_heads, axis=2), axis=0) # (h*N, T_q, C/h)
K_ = tf.concat(tf.split(K, num_heads, axis=2), axis=0) # (h*N, T_k, C/h)
V_ = tf.concat(tf.split(V, num_heads, axis=2), axis=0) # (h*N, T_k, C/h)
# Multiplication
outputs = tf.matmul(Q_, tf.transpose(K_, [0, 2, 1])) # (h*N, T_q, T_k)
# Scale
outputs = outputs / (K_.get_shape().as_list()[-1] ** 0.5)
# Key Masking
key_masks = tf.sign(tf.abs(tf.reduce_sum(keys, axis=-1))) # (N, T_k)
key_masks = tf.tile(key_masks, [num_heads, 1]) # (h*N, T_k)
key_masks = tf.tile(tf.expand_dims(key_masks, 1), [1, tf.shape(queries)[1], 1]) # (h*N, T_q, T_k)
paddings = tf.ones_like(outputs) * (-2 ** 32 + 1)
outputs = tf.where(tf.equal(key_masks, 0), paddings, outputs) # (h*N, T_q, T_k)
# Causality = Future blinding
if causality:
diag_vals = tf.ones_like(outputs[0, :, :]) # (T_q, T_k)
tril = tf.contrib.linalg.LinearOperatorTriL(diag_vals).to_dense() # (T_q, T_k)
masks = tf.tile(tf.expand_dims(tril, 0), [tf.shape(outputs)[0], 1, 1]) # (h*N, T_q, T_k)
paddings = tf.ones_like(masks) * (-2 ** 32 + 1)
outputs = tf.where(tf.equal(masks, 0), paddings, outputs) # (h*N, T_q, T_k)
# Activation
outputs = tf.nn.softmax(outputs) # (h*N, T_q, T_k)
# Query Masking
query_masks = tf.sign(tf.abs(tf.reduce_sum(queries, axis=-1))) # (N, T_q)
query_masks = tf.tile(query_masks, [num_heads, 1]) # (h*N, T_q)
query_masks = tf.tile(tf.expand_dims(query_masks, -1), [1, 1, tf.shape(keys)[1]]) # (h*N, T_q, T_k)
outputs *= query_masks # broadcasting. (N, T_q, C)
# Dropouts
outputs = tf.nn.dropout(outputs,dropout)
# Weighted sum
outputs = tf.matmul(outputs, V_) # ( h*N, T_q, C/h)
# Restore shape
outputs = tf.concat(tf.split(outputs, num_heads, axis=0), axis=2) # (N, T_q, C)
# Residual connection
outputs += queries
# Normalize
outputs = normalize(outputs) # (N, T_q, C)
return outputs
def get_losses(d_out_real, d_out_fake, x_real_onehot, x_fake_onehot_appr,
gen_o, discriminator, config):
batch_size = config['batch_size']
gan_type = config['gan_type']
if gan_type == 'standard': # the non-satuating GAN loss
d_loss_real = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_real, labels=tf.ones_like(d_out_real)))
d_loss_fake = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_fake, labels=tf.zeros_like(d_out_fake)))
d_loss = d_loss_real + d_loss_fake
g_loss = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_fake, labels=tf.ones_like(d_out_fake)))
elif gan_type == 'JS': # the vanilla GAN loss
d_loss_real = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_real, labels=tf.ones_like(d_out_real)))
d_loss_fake = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_fake, labels=tf.zeros_like(d_out_fake)))
d_loss = d_loss_real + d_loss_fake
g_loss = -d_loss_fake
elif gan_type == 'KL': # the GAN loss implicitly minimizing KL-divergence
d_loss_real = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_real, labels=tf.ones_like(d_out_real)))
d_loss_fake = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_fake, labels=tf.zeros_like(d_out_fake)))
d_loss = d_loss_real + d_loss_fake
g_loss = tf.reduce_mean(-d_out_fake)
elif gan_type == 'hinge': # the hinge loss
d_loss_real = tf.reduce_mean(tf.nn.relu(1.0 - d_out_real))
d_loss_fake = tf.reduce_mean(tf.nn.relu(1.0 + d_out_fake))
d_loss = d_loss_real + d_loss_fake
g_loss = -tf.reduce_mean(d_out_fake)
elif gan_type == 'tv': # the total variation distance
d_loss = tf.reduce_mean(tf.tanh(d_out_fake) - tf.tanh(d_out_real))
g_loss = tf.reduce_mean(-tf.tanh(d_out_fake))
elif gan_type == 'wgan-gp': # WGAN-GP
d_loss = tf.reduce_mean(d_out_fake) - tf.reduce_mean(d_out_real)
GP = gradient_penalty(discriminator, x_real_onehot, x_fake_onehot_appr,
config)
d_loss += GP
g_loss = -tf.reduce_mean(d_out_fake)
elif gan_type == 'LS': # LS-GAN
d_loss_real = tf.reduce_mean(tf.squared_difference(d_out_real, 1.0))
d_loss_fake = tf.reduce_mean(tf.square(d_out_fake))
d_loss = d_loss_real + d_loss_fake
g_loss = tf.reduce_mean(tf.squared_difference(d_out_fake, 1.0))
elif gan_type == 'RSGAN': # relativistic standard GAN
d_loss = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_real - d_out_fake,
labels=tf.ones_like(d_out_real)))
g_loss = tf.reduce_mean(
tf.nn.sigmoid_cross_entropy_with_logits(
logits=d_out_fake - d_out_real,
labels=tf.ones_like(d_out_fake)))
else:
raise NotImplementedError("Divergence '%s' is not implemented" %
gan_type)
log_pg = tf.reduce_mean(tf.log(gen_o +
EPS)) # [1], measures the log p_g(x)
return log_pg, g_loss, d_loss
