def __init__(self, X, multi_label: bool, nbChannels: int,
nbCategories: int, _keep_proba):
self.leNet_bottom = bricks.LeNet_bottom(X, nbChannels)
""""""
"""on récupère la sortie de leNet_bottom"""
h_pool2 = self.leNet_bottom.pool2
'''
On connecte les 7*7*64 neurones à une nouvelle couche de 1024 neurons
fc signifie : fully connected.
'''
W_fc1 = ing.weight_variable([7 * 7 * 64, 1024])
b_fc1 = ing.bias_variable([1024])
h_pool2_flat = tf.reshape(h_pool2, [-1, 7 * 7 * 64])
h_fc1 = tf.nn.relu(tf.matmul(h_pool2_flat, W_fc1) + b_fc1)
"""dropout pour éviter le sur-apprentissage"""
h_fc1_drop = tf.nn.dropout(h_fc1, _keep_proba)
''' on connecte les 1024 neurons avec nbCategories neurones de sorties'''
W_fc2 = ing.weight_variable([1024, nbCategories])
b_fc2 = ing.bias_variable([nbCategories])
if multi_label:
''' sigmoid produit un vecteur dont chaque composante est une proba'''
self.Y = tf.nn.sigmoid(tf.matmul(h_fc1_drop, W_fc2) + b_fc2)
else:
'''softmax produit un vecteur de probabilité (la somme des composantes fait 1)'''
self.Y = tf.nn.softmax(tf.matmul(h_fc1_drop, W_fc2) + b_fc2)
def __init__(self, multi_label, nbChannels, nbCategories):
self._X = tf.placeholder(name="X", dtype=tf.float32)
self._Y = tf.placeholder(name="Y", dtype=tf.float32)
self.learning_rate = tf.get_variable("learning_rate",
initializer=1e-4,
trainable=False)
self.keep_proba = tf.get_variable("keep_proba",
initializer=1.,
trainable=False)
self.threshold = tf.get_variable("threshold",
initializer=0.5,
trainable=False)
self.hat = Hat_multi_vs_mono(self._X, multi_label, nbChannels,
nbCategories, self.keep_proba)
"""la loss et l'accuracy sont calculée de manière très différentes quand c'est du multi-label"""
if multi_label:
self._loss = ing.crossEntropy_multiLabel(self._Y, self.hat.Y)
Y_hat_binary = tf.cast(
tf.greater(self.hat.Y, self.threshold), tf.float32
) #ing.make_binary_with_threshold(self._Y_hat,self.threshold)
""" l'accuracy dépend d'un threshold. Attention, une accuracy proche de 1 n'est pas forcément bonne:
Ex: Y_hat_binary = [ 0,0,0,0,0,0,0,0,0,1]
Y_hat = [ 1,0,0,0,0,0,0,0,0,0]
---> accuracy = 80 %
alors que le modèle n'a rien compris.
"""
self._accuracy = tf.reduce_mean(
tf.cast(tf.equal(Y_hat_binary, self._Y), tf.float32))
else:
self._loss = ing.crossEntropy(self._Y, self.hat.Y)
Y_cat = tf.argmax(self._Y, dimension=1)
Y_cat_hat = tf.argmax(self.hat.Y, dimension=1)
self._accuracy = tf.reduce_mean(
tf.cast(tf.equal(Y_cat, Y_cat_hat), tf.float32))
self._minimizer = tf.train.AdamOptimizer(self.learning_rate).minimize(
self._loss)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose = True
def __init__(self, nbChannels: int, nbCategories: int, nbRegressor: int):
h_img, w_img = 28, 28
self.inputSize = (h_img, w_img, nbChannels)
self.nbRegressor = nbRegressor
self.nbCategories = nbCategories
self._X = tf.placeholder(name="X",
dtype=tf.float32,
shape=(None, h_img, w_img, nbChannels))
tf.summary.image("X", self._X, max_outputs=12)
self._Y_class = tf.placeholder(name="Y_class",
dtype=tf.float32,
shape=(None, nbCategories))
self._Y_reg = tf.placeholder(name="Y_reg",
dtype=tf.float32,
shape=(None, nbRegressor))
self.learning_rate = tf.get_variable("learning_rate",
initializer=1e-2,
trainable=False)
self.keep_proba = tf.get_variable("keep_proba",
initializer=1.,
trainable=False)
self.hat = Hat_bounding(self._X, self.keep_proba, nbChannels,
nbCategories, nbRegressor)
#self._Y_class_hat, self._Y_reg_hat = xToY.getYclass_Yreg(self._X, self.keep_proba)
self._loss_class = 20. * ing.crossEntropy(self._Y_class,
self.hat.Y_prob, True)
self._loss_reg = tf.reduce_mean((self._Y_reg - self.hat.Y_bound)**2)
self._accuracy = tf.reduce_mean(
tf.cast(tf.equal(self.hat.Y_cat,
tf.argmax(self._Y_class, dimension=1)),
dtype=tf.float32))
self._minimizer = tf.train.AdamOptimizer(1e-4).minimize(
self._loss_class + self._loss_reg)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose = True
tf.summary.scalar("loss_class", self._loss_class)
tf.summary.scalar("loss_reg", self._loss_reg)
tf.summary.scalar("accuracy", self._accuracy)
self._summary = tf.summary.merge_all()
def __init__(self, X, _keep_proba, nbChannels: int, nbCategories: int,
nbRegressor: int):
leNet_bottom = bricks.LeNet_bottom(X, nbChannels)
"""on récupère la sortie de leNet_bottom"""
h_pool2 = leNet_bottom.pool2
W_fc1 = ing.weight_variable([7 * 7 * 64, 1024])
b_fc1 = ing.bias_variable([1024])
h_pool2_flat = tf.reshape(h_pool2, [-1, 7 * 7 * 64])
h_fc1 = tf.nn.relu(tf.matmul(h_pool2_flat, W_fc1) + b_fc1)
h_fc1_drop = tf.nn.dropout(h_fc1, _keep_proba)
''' on connecte les 1024 neurons avec nbCategories neurones de sorties'''
W_fc2 = ing.weight_variable([1024, nbCategories])
b_fc2 = ing.bias_variable([nbCategories])
self.Y_prob = tf.nn.softmax(tf.matmul(h_fc1_drop, W_fc2) + b_fc2)
self.Y_cat = tf.arg_max(self.Y_prob, dimension=1)
''' on connecte les 1024 neurons avec nbRegressor neurones de sorties'''
W_fc_reg = ing.weight_variable([1024, nbRegressor])
b_fc_reg = ing.bias_variable([nbRegressor])
tf.summary.histogram("b_fc2", b_fc2)
tf.summary.histogram("b_fc1", b_fc1)
tf.summary.histogram("W_fc2", W_fc2)
tf.summary.histogram("W_fc1", W_fc1)
self.Y_bound = tf.matmul(h_fc1_drop, W_fc_reg) + b_fc_reg
def __init__(self, h_img: int, w_img: int, nbChannels: int, nbCategories,
favoritism):
(self.batch_size, self.h_img, self.w_img,
self.nbChannels) = (None, h_img, w_img, nbChannels)
self.nbCategories = nbCategories
self._X = tf.placeholder(name="X",
dtype=tf.float32,
shape=(None, h_img, w_img, nbChannels))
"""les annotations : une image d'entier, chaque entier correspond à une catégorie"""
self._Y_cat = tf.placeholder(
dtype=tf.int32,
shape=[None, h_img, w_img],
name="Y",
)
self.keep_proba = tf.get_variable("keep_proba",
initializer=1.,
trainable=False)
self.learning_rate = tf.get_variable("learning_rate",
initializer=1e-3,
trainable=False)
self.hat = Hat_fullyConv(self._X, nbChannels, nbCategories,
self.keep_proba, favoritism)
""" une version 'déjà' prête de la loss """
#self._loss = tf.reduce_mean((tf.nn.sparse_softmax_cross_entropy_with_logits(logits=self.hat.Y_logits,labels=self._Y_cat)))
""" la version 'à la main' """
self._loss = ing.crossEntropy(
tf.one_hot(self._Y_cat, self.nbCategories), self.hat.Y_proba)
self._accuracy = tf.reduce_mean(
tf.cast(tf.equal(self._Y_cat, self.hat.Y_cat), tf.float32))
"""la cat 0 est la plus présente (c'est le fond de l'image).
le classement trivial revient à classer tous les pixels en 0"""
self._accuracy_trivial = tf.reduce_mean(
tf.cast(tf.equal(0, self.hat.Y_cat), tf.float32))
""" optimizer, monitoring des gradients """
self._optimizer = tf.train.AdamOptimizer(self.learning_rate)
self._grads_vars = self._optimizer.compute_gradients(self._loss)
for index, grad in enumerate(self._grads_vars):
tf.summary.histogram(
"{}-grad".format(self._grads_vars[index][1].name),
self._grads_vars[index][0])
tf.summary.histogram(
"{}-var".format(self._grads_vars[index][1].name),
self._grads_vars[index][1])
""" la minimisation est faite via cette op: """
self._minimizer = self._optimizer.apply_gradients(self._grads_vars)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose = True
tf.summary.scalar("loss", self._loss)
tf.summary.scalar("accuracy", self._accuracy)
max_outputs = 5
tf.summary.image("input_image", self._X, max_outputs=max_outputs)
tf.summary.image("ground_truth",
tf.expand_dims(tf.cast(self._Y_cat, tf.float32), 3),
max_outputs=max_outputs)
for cat in range(1, self.nbCategories):
tf.summary.image("hat_proba cat 1",
tf.expand_dims(self.hat.Y_proba[:, :, :, cat], 3),
max_outputs=max_outputs)
self._summary = tf.summary.merge_all()
def __init__(self, X, nbChannels: int, nbCategories: int, keep_prob,
favoritism):
""""""
"""on récupère le réseau très simple: leNet_bottom"""
leNet = bricks.LeNet_bottom(X, nbChannels)
"""la sorties est un volume 7*7*64. """
""" DANS LA SUITE: on recopie leNet, mais en remplaçant les fully-connected par des convolutions 1*1 """
""" on transforme le layer d'avant en un volume 7*7*1024 par des conv 1*1"""
with tf.variable_scope("smallConv0"):
W = ing.weight_variable([1, 1, 64, 1024], name="W")
b = ing.bias_variable([1024], name="b")
conv = tf.nn.conv2d(
leNet.Y, W, strides=[1, 1, 1, 1], padding="SAME") + b
relu = tf.nn.relu(conv, name="relu")
relu_dropout = tf.nn.dropout(relu,
keep_prob=keep_prob,
name="dropout")
""" on transforme le layer d'avant en un volume 7*7*nbCategories par des conv 1*1"""
with tf.variable_scope("smallConv1"):
W = ing.weight_variable([1, 1, 1024, nbCategories], name="W")
b = ing.bias_variable([nbCategories], name="b")
conv = tf.nn.conv2d(
relu_dropout, W, strides=[1, 1, 1, 1], padding="SAME") + b
relu = tf.nn.relu(conv, name="relu")
relu_dropout = tf.nn.dropout(relu,
keep_prob=keep_prob,
name="dropout")
""" DANS LA SUITE : on dilate les images 7*7 pour revenir à la résolution initiale 28*28 """
""" 7*7*nbCategories ---> 14*14*32 """
with tf.variable_scope("dilate0"):
""" [height, width, output_channels, in_channels=nbCategories] """
W = tf.Variable(initial_value=ing.get_bilinear_initial_tensor(
[4, 4, 32, nbCategories], 2),
name='W')
b = ing.bias_variable([32], name="b")
upConv0 = ing.up_convolution(relu_dropout, W, 2, 2) + b
"""on y ajoute le milieu de leNet (14*14*32 aussi)"""
fuse_1 = upConv0 + leNet.pool1
ing.summarizeW_asImage(W)
"""on dilate maintenant fuse_1 pour atteindre la résolution des images d'origine
14*14*32 ----> 28*28*nbCategories
"""
with tf.variable_scope("dilate1"):
W = tf.Variable(initial_value=ing.get_bilinear_initial_tensor(
[4, 4, nbCategories, 32], 2),
name='W')
b = ing.bias_variable([nbCategories], name="b")
ing.summarizeW_asImage(W)
""" les logits (on y applique pas le softmax car plus loin on utilisera la loss tf.nn.sparse_softmax_cross_entropy_with_logits) """
self.Y_logits = ing.up_convolution(fuse_1, W, 2, 2) + b
self.Y_proba = tf.nn.softmax(self.Y_logits)
""" chaque pixel reçoit la catégorie qui a la plus forte probabilité, en tenant compte du favoritisme."""
self.Y_cat = tf.cast(
tf.argmax(self.Y_proba * favoritism,
dimension=3,
name="prediction"), tf.int32)
def __init__(self, X: tf.Tensor, nbChannels: int):
self.nbChannels = nbChannels
nbSummaryOutput = 4
""""""
''' couche de convolution 1'''
with tf.variable_scope("conv1"):
W_conv1 = ing.weight_variable([5, 5, self.nbChannels, 32],
name="W")
b_conv1 = ing.bias_variable([32], name="b")
self.filtred1 = tf.nn.relu(ing.conv2d_basic(X, W_conv1, b_conv1))
""" shape=(?,14*14,nbChannels) """
self.pool1 = ing.max_pool_2x2(self.filtred1)
ing.summarizeW_asImage(W_conv1)
tf.summary.image("filtred",
self.filtred1[:, :, :, 0:1],
max_outputs=nbSummaryOutput)
''' couche de convolution 2'''
with tf.variable_scope("conv2"):
W_conv2 = ing.weight_variable([5, 5, 32, 64], name="W")
b_conv2 = ing.bias_variable([64], name="b")
self.filtred2 = tf.nn.relu(
ing.conv2d_basic(self.pool1, W_conv2, b_conv2))
""" shape=(?,7*7,nbChannels) """
self.pool2 = ing.max_pool_2x2(self.filtred2)
ing.summarizeW_asImage(W_conv2)
tf.summary.image("filtred",
self.filtred2[:, :, :, 0:1],
max_outputs=12)
"""un alias pour la sortie"""
self.Y = self.pool2
def __init__(self, h_img: int, w_img: int, nbChannels: int, nbCategories,
favoritism, depth0, depth1):
self.nbConsecutiveOptForOneFit = 1
self.summaryEither_cat_proba = 0
(self.batch_size, self.h_img, self.w_img,
self.nbChannels) = (None, h_img, w_img, nbChannels)
self.nbCategories = nbCategories
""" PLACEHOLDER """
self._X = tf.placeholder(name="X",
dtype=tf.float32,
shape=(None, h_img, w_img, nbChannels))
"""les annotations : une image d'entier, chaque entier correspond à une catégorie"""
self._Y_proba = tf.placeholder(
dtype=tf.float32,
shape=[None, h_img, w_img, nbCategories],
name="Y")
self._itr = tf.placeholder(name="itr", dtype=tf.float32)
self.keep_proba = tf.get_variable("keep_proba",
initializer=1.,
trainable=False)
self.learning_rate = tf.get_variable("learning_rate",
initializer=1e-2,
trainable=False)
self.hat = Hat_fullyConv(self._X, nbChannels, nbCategories,
self.keep_proba, favoritism, depth0, depth1)
""" les loss qu'on suivra sur le long terme. Le *10 c'est juste pour mieux interpréter """
self._loss_instances = -10 * matching_IoU_batch(
self._Y_proba[:, :, :, 1:], self.hat.Y_proba[:, :, :, 1:])
self._loss_background = -10 * just_IoU_batch(
self._Y_proba[:, :, :, 0], self.hat.Y_proba[:, :, :, 0])
self._penalty = 10 * sobel_penalty(self.hat.Y_proba, self.nbCategories)
""" si le coef devant la _loss_background est trop grand, la loss_instance reste bloquée à 0.
mais s'il est trop petit le background se transforme en damier !"""
self._loss = self._loss_instances + tf.nn.sigmoid(
self._itr - 5) * self._loss_background + 5. * self._penalty
tf.summary.scalar("loss", self._loss)
tf.summary.scalar("loss instances", self._loss_instances)
tf.summary.scalar("loss background", self._loss_background)
tf.summary.scalar("penalty", self._penalty)
""" optimizer, monitoring des gradients """
adam_opt = tf.train.AdamOptimizer(self.learning_rate)
_grads_vars = adam_opt.compute_gradients(self._loss)
for index, grad in enumerate(_grads_vars):
tf.summary.histogram("{}-grad".format(_grads_vars[index][0].name),
_grads_vars[index][0])
tf.summary.histogram("{}-var".format(_grads_vars[index][1].name),
_grads_vars[index][1])
if len(_grads_vars[index][0].get_shape().as_list()) == 4:
ing.summarizeW_asImage(_grads_vars[index][0])
self._summary = tf.summary.merge_all()
""" la minimisation est faite via cette op: """
self.step_op = adam_opt.apply_gradients(_grads_vars)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose = True
max_outputs = 4
tf.summary.image("input_image", self._X, max_outputs=max_outputs)
if self.summaryEither_cat_proba == 0:
output = tf.expand_dims(tf.cast(self.hat.Y_cat, dtype=tf.float32),
3)
output_color = ing.colorize(
output, vmin=0.0, vmax=self.nbCategories,
cmap='plasma') #'viridis', 'plasma', 'inferno', 'magma'
tf.summary.image("Y_hat", output_color)
else:
for cat in range(0, self.nbCategories):
tf.summary.image("hat_proba cat" + str(cat),
tf.expand_dims(self.hat.Y_proba[:, :, :, cat],
3),
max_outputs=max_outputs)
self._summary = tf.summary.merge_all()
def __init__(self, encoder:Encoder, Y_last_dim:int, keep_prob:float, favoritism:tuple, depth0:int, depth1:int):
""""""
""" on transforme le layer d'avant en un volume 7*7*depth0 par des conv 1*1"""
with tf.variable_scope("smallConv0"):
W = ing.weight_variable([1, 1, 64, depth0], name="W")
b= ing.bias_variable([depth0], name="b")
conv = tf.nn.conv2d(encoder.Y, W, strides=[1, 1, 1, 1], padding="SAME") + b
relu = tf.nn.relu(conv, name="relu")
relu_dropout = tf.nn.dropout(relu, keep_prob=keep_prob,name="dropout")
""" on transforme le layer d'avant en un volume 7*7*nbCategories par des conv 1*1"""
with tf.variable_scope("smallConv1"):
W = ing.weight_variable([1, 1, depth0,depth1], name="W")
b = ing.bias_variable([depth1], name="b")
conv = tf.nn.conv2d(relu_dropout, W, strides=[1, 1, 1, 1], padding="SAME") + b
relu = tf.nn.relu(conv, name="relu")
relu_dropout = tf.nn.dropout(relu, keep_prob=keep_prob, name="dropout")
""" DANS LA SUITE : on dilate les images 7*7 pour revenir à la résolution initiale 28*28 """
""" 7*7*depth1 ---> 14*14*32 """
with tf.variable_scope("dilate0"):
""" [height, width, output_channels, in_channels=nbCategories] """
W = tf.Variable(initial_value=ing.get_bilinear_initial_tensor([4, 4, 32, depth1],2),name='W')
b = ing.bias_variable([32], name="b")
upConv0 = ing.up_convolution(relu_dropout, W, 2, 2) + b
"""on y ajoute le milieu de leNet (14*14*32 aussi)"""
fuse_1 = upConv0 + encoder.pool1
ing.summarizeW_asImage(W)
"""on dilate maintenant fuse_1 pour atteindre la résolution des images d'origine
14*14*32 ----> 28*28*nbCategories
"""
with tf.variable_scope("dilate1"):
W = tf.Variable(initial_value=ing.get_bilinear_initial_tensor([4, 4, Y_last_dim, 32], 2), name='W')
b = ing.bias_variable([Y_last_dim], name="b")
ing.summarizeW_asImage(W)
""" les logits (on y applique pas le softmax car plus loin on peut éventuellement utiliser tf.nn.sparse_softmax_cross_entropy_with_logits) """
self.Y_logits = ing.up_convolution(fuse_1,W,2,2) +b
self.Y_proba= tf.nn.softmax(self.Y_logits)
if favoritism is None: favoritism=1
""" chaque pixel reçoit la catégorie qui a la plus forte probabilité, en tenant compte du favoritisme."""
self.Y_cat = tf.cast(tf.argmax(self.Y_proba*favoritism, dimension=3, name="prediction"),tf.int32)
def __init__(self,h_img:int,w_img:int,nbChannels:int,nbCategories,nbRegressor,favoritism,depth0,depth1):
self.nbConsecutiveOptForOneFit=1
self.summaryEither_cat_proba=0
self.nbRegressor=nbRegressor
(self.batch_size,self.h_img, self.w_img, self.nbChannels)=(None,h_img,w_img,nbChannels)
self.nbCategories=nbCategories
""" PLACEHOLDER """
self._X = tf.placeholder(name="X", dtype=tf.float32,shape=(None,h_img,w_img,nbChannels))
"""les annotations : une image d'entier, chaque entier correspond à une catégorie"""
self._Y_cat = tf.placeholder(dtype=tf.int32, shape=[None, h_img, w_img], name="Y_cat" )
self._Y_reg = tf.placeholder(dtype=tf.float32, shape=[None, h_img, w_img,nbRegressor], name="Y_cat" )
self._itr = tf.placeholder(name="itr", dtype=tf.float32)
self.keep_proba=tf.get_variable("keep_proba",initializer=1.,trainable=False)
self.learning_rate=tf.get_variable("learning_rate",initializer=1e-2,trainable=False)
"""la sorties est un volume 7*7*64. """
encoder = Encoder(self._X, nbChannels)
self.hat=Decoder(encoder, nbCategories, self.keep_proba, favoritism, depth0, depth1)
self.hat_reg=Decoder(encoder, self.nbRegressor, self.keep_proba, favoritism, depth0, depth1)
""" les loss qu'on suivra sur le long terme. Les coef, c'est juste pour avoir des grandeurs faciles à lire """
self.where=tf.cast((self._Y_cat!=0),dtype=tf.float32)
self._loss_reg = 0.1 * tf.reduce_mean(self.where*(self._Y_reg-self.hat_reg.Y_logits)**2)
self._loss_cat =tf.reduce_mean((tf.nn.sparse_softmax_cross_entropy_with_logits(logits=self.hat.Y_logits, labels=self._Y_cat)))
self._penalty=10*sobel_penalty(self.hat.Y_proba,self.nbCategories)
""" si le coef devant la _loss_background est trop grand, la loss_instance reste bloquée à 0.
mais s'il est trop petit le background se transforme en damier !"""
self._loss=self._loss_cat + self._loss_reg
tf.summary.scalar("log loss", tf.log(self._loss))
tf.summary.scalar("log loss reg", tf.log(self._loss_reg))
tf.summary.scalar("log loss cat", tf.log(self._loss_cat))
tf.summary.scalar("log penalty", tf.log(self._penalty))
""" optimizer, monitoring des gradients """
adam_opt = tf.train.AdamOptimizer(self.learning_rate)
_grads_vars = adam_opt.compute_gradients(self._loss)
# for index, grad in enumerate(_grads_vars):
# tf.summary.histogram("{}-grad".format(_grads_vars[index][0].name), _grads_vars[index][0])
# tf.summary.histogram("{}-var".format(_grads_vars[index][1].name), _grads_vars[index][1])
# if len(_grads_vars[index][0].get_shape().as_list())==4:
# ing.summarizeW_asImage(_grads_vars[index][0])
self._summary = tf.summary.merge_all()
""" la minimisation est faite via cette op: """
self.step_op = adam_opt.apply_gradients(_grads_vars)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose=True
max_outputs=8
tf.summary.image("input_image", self._X, max_outputs=max_outputs)
if self.summaryEither_cat_proba==0:
output = tf.expand_dims(tf.cast(self.hat.Y_cat,dtype=tf.float32),3)
output_color = ing.colorize(output, vmin=0.0, vmax=self.nbCategories, cmap='plasma') #'viridis', 'plasma', 'inferno', 'magma'
tf.summary.image("Y_hat",output_color)
for i in range(self.nbRegressor):
output2 = tf.expand_dims(tf.cast(self.hat_reg.Y_logits[:,:,:,i], dtype=tf.float32), 3)
""" maxNbStrate depend of the size of cells. """
output_color2 = ing.colorize(output2, vmin=None, vmax=None,cmap='plasma') # 'viridis', 'plasma', 'inferno', 'magma'
tf.summary.image("Y_reg_hat"+str(i), output_color2)
else :
for cat in range(0,self.nbCategories):
tf.summary.image("hat_proba cat"+str(cat), tf.expand_dims(self.hat.Y_proba[:,:,:,cat],3), max_outputs=max_outputs)
self._summary=tf.summary.merge_all()
def __init__(self, h_img: int, w_img: int, nbChannels: int, nbCategories,
favoritism, depth0, depth1):
self.nbConsecutiveOptForOneFit = 1
self.summaryEither_cat_proba = 0
(self.batch_size, self.h_img, self.w_img,
self.nbChannels) = (None, h_img, w_img, nbChannels)
self.nbCategories = nbCategories
""" PLACEHOLDER """
self._X = tf.placeholder(name="X",
dtype=tf.float32,
shape=(None, h_img, w_img, nbChannels))
"""les annotations : une image d'entier, chaque entier correspond à une catégorie"""
self._Y_cat = tf.placeholder(dtype=tf.float32,
shape=[None, h_img, w_img, nbCategories],
name="Y_cat")
self._Y_background = tf.placeholder(dtype=tf.float32,
shape=[None, h_img, w_img, 2],
name="Y_background")
self._itr = tf.placeholder(name="itr", dtype=tf.int32)
self.keep_proba = tf.get_variable("keep_proba",
initializer=1.,
trainable=False)
self.learning_rate = tf.get_variable("learning_rate",
initializer=1e-2,
trainable=False)
"""la sorties est un volume 7*7*64. """
encoder = Encoder(self._X, nbChannels)
self.hat = Decoder(encoder, nbCategories, self.keep_proba, favoritism,
depth0, depth1, True)
self.hat_background = Decoder(encoder, 2, self.keep_proba, favoritism,
depth0, depth1, False)
""" les loss qu'on suivra sur le long terme. Les coef, c'est juste pour avoir des grandeurs faciles à lire """
where = tf.cast((self._Y_background[:, :, :, 1] == 1),
dtype=tf.float32)
self._loss_background = -tf.reduce_mean(
self._Y_background * tf.log(self.hat_background.Y_proba + 1e-10))
self._loss_cat = ing.crossEntropy_multiLabel(self._Y_cat,
self.hat.Y_proba)
self._penalty = 10 * sobel_penalty(self.hat.Y_proba, self.nbCategories)
""" si le coef devant la _loss_background est trop grand, la loss_instance reste bloquée à 0.
mais s'il est trop petit le background se transforme en damier !"""
self._loss = self._loss_cat #+self._loss_background
tf.summary.scalar("loss", self._loss)
tf.summary.scalar("loss cat", self._loss_cat)
tf.summary.scalar("loss background", self._loss_background)
tf.summary.scalar("penalty", self._penalty)
tf.summary.histogram("hat_Y_cat", self.hat.Y_proba)
shape = self.hat.Y_proba[0, :, :, :].get_shape().as_list()
tf.summary.scalar(
"zero of Y_hat_proba",
tf.count_nonzero(self.hat.Y_proba[0, :, :, :]) -
shape[0] * shape[1] * shape[2])
""" optimizer, monitoring des gradients """
adam_opt = tf.train.AdamOptimizer(self.learning_rate)
_grads_vars = adam_opt.compute_gradients(self._loss)
# for index, grad in enumerate(_grads_vars):
# tf.summary.histogram("{}-grad".format(_grads_vars[index][0].name), _grads_vars[index][0])
# tf.summary.histogram("{}-var".format(_grads_vars[index][1].name), _grads_vars[index][1])
# if len(_grads_vars[index][0].get_shape().as_list())==4:
# ing.summarizeW_asImage(_grads_vars[index][0])
self._summary = tf.summary.merge_all()
""" la minimisation est faite via cette op: """
self.step_op = adam_opt.apply_gradients(_grads_vars)
self.rien = tf.ones(1)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
self.verbose = True
max_outputs = 8
tf.summary.image("input_image", self._X, max_outputs=max_outputs)
self._Y_cat_sum = tf.reduce_sum(self._Y_cat, axis=3)
if self.summaryEither_cat_proba == 0:
output = tf.expand_dims(
tf.cast(self.hat.Y_cat_sum, dtype=tf.float32), 3)
output_color = ing.colorize(output,
vmin=0.0,
vmax=self.nbCategories,
cmap='plasma')
tf.summary.image("Y hat strates",
output_color,
max_outputs=max_outputs)
# output = tf.expand_dims(tf.cast(self._Y_cat_sum,dtype=tf.float32),3)
# output_color = ing.colorize(output, vmin=0.0, vmax=self.nbCategories, cmap='plasma') #'viridis', 'plasma', 'inferno', 'magma'
# tf.summary.image("ground truth",output_color)
#
# output = tf.expand_dims(tf.cast(self.hat.Y_cat_sum, dtype=tf.float32), 3)
# output_color = ing.colorize(output, vmin=None, vmax=None,
# cmap='plasma') # 'viridis', 'plasma', 'inferno', 'magma'
# tf.summary.image("hat strates", output_color)
#
#
# output = tf.expand_dims(tf.cast(self.hat_background.Y_proba[:,:,:,0], dtype=tf.float32), 3)
# output_color = ing.colorize(output, vmin=0.0, vmax=self.nbCategories,
# cmap='plasma') # 'viridis', 'plasma', 'inferno', 'magma'
# tf.summary.image("hat background", output_color)
else:
for cat in range(0, self.nbCategories):
tf.summary.image("hat_proba cat" + str(cat),
tf.expand_dims(self.hat.Y_proba[:, :, :, cat],
3),
max_outputs=max_outputs)
self._summary = tf.summary.merge_all()