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Tensorflow/tutoriel10/CIFAR_10_vgg.py

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+import tensorflow as tf
+import numpy as np
+import matplotlib.pyplot as plot
+import cv2
+import vgg
+from sklearn.utils import shuffle
+
+def read_cifar_file(file, images, labels):
+    shift=0
+    f=np.fromfile(file, dtype=np.uint8)
+    while shift!=f.shape[0]:
+        labels.append(np.eye(10)[f[shift]])
+        shift+=1
+        images.append(f[shift:shift+3*32*32].reshape(3, 32, 32).transpose(1, 2, 0)/255)
+        shift+=3*32*32
+
+taille_batch=100
+nbr_entrainement=50
+labels=['avion', 'automobile', 'oiseau', 'chat', 'cerf', 'chien', 'grenouille', 'cheval', 'bateau', 'camion']
+
+train_images=[]
+train_labels=[]
+read_cifar_file("cifar-10-batches-bin/data_batch_1.bin", train_images, train_labels)
+read_cifar_file("cifar-10-batches-bin/data_batch_2.bin", train_images, train_labels)
+read_cifar_file("cifar-10-batches-bin/data_batch_3.bin", train_images, train_labels)
+read_cifar_file("cifar-10-batches-bin/data_batch_4.bin", train_images, train_labels)
+read_cifar_file("cifar-10-batches-bin/data_batch_5.bin", train_images, train_labels)
+
+test_images=[]
+test_labels=[]
+read_cifar_file("cifar-10-batches-bin/test_batch.bin", test_images, test_labels)
+    
+images, labels, is_training, sortie, train, accuracy, save=vgg.vggnet(nbr_classes=10, learning_rate=0.01)
+
+def transform_img(img):
+    img=tf.image.random_flip_left_right(img)
+    img=tf.image.random_hue(img, 0.08)
+    img=tf.image.random_saturation(img, 0.6, 1.6)
+    img=tf.image.random_brightness(img, 0.05)
+    img=tf.image.random_contrast(img, 0.7, 1.3)
+    x=int(img.shape[0])
+    y=int(img.shape[1])
+    z=int(img.shape[2])
+    img=tf.image.random_crop(img, [int(x*0.90), int(y*0.90), z])
+    img=tf.image.resize_images(img, (x, y))
+    return(img)
+
+fichier=open("log", "a")
+with tf.Session() as s:
+    s.run(tf.global_variables_initializer())
+    tab_train=[]
+    tab_test=[]
+
+    train_images=np.array(train_images, dtype=np.float32)
+    train_images2=tf.map_fn(transform_img, train_images)
+    train_images3=tf.map_fn(transform_img, train_images)
+    train_images4=tf.map_fn(transform_img, train_images)
+    train_images=tf.concat([train_images, train_images2, train_images3, train_images4], axis=0)
+    train_labels=np.array(train_labels)
+    train_labels=tf.concat([train_labels, train_labels, train_labels, train_labels], axis=0)
+
+    train_images=s.run(train_images)
+    train_labels=s.run(train_labels)
+    train_images, train_labels=shuffle(train_images, train_labels)
+
+    for id_entrainement in np.arange(nbr_entrainement):        
+        print("> Entrainement", id_entrainement)
+        for batch in np.arange(0, len(train_images), taille_batch):
+            s.run(train, feed_dict={
+                images: train_images[batch:batch+taille_batch],
+                labels: train_labels[batch:batch+taille_batch],
+                is_training: True
+            })
+        print("  entrainement OK")
+        tab_accuracy_train=[]
+        for batch in np.arange(0, len(train_images), taille_batch):
+            p=s.run(accuracy, feed_dict={
+                images: train_images[batch:batch+taille_batch],
+                labels: train_labels[batch:batch+taille_batch],
+                is_training: False
+            })
+            tab_accuracy_train.append(p)
+        print("  train:", np.mean(tab_accuracy_train))
+        tab_accuracy_test=[]
+        for batch in np.arange(0, len(test_images), taille_batch):
+            p=s.run(accuracy, feed_dict={
+                images: test_images[batch:batch+taille_batch],
+                labels: test_labels[batch:batch+taille_batch],
+                is_training: False
+            })
+            tab_accuracy_test.append(p)
+        print("  test :", np.mean(tab_accuracy_test))
+        tab_train.append(1-np.mean(tab_accuracy_train))
+        tab_test.append(1-np.mean(tab_accuracy_test))
+        fichier.write("{:d}:{:f}:{:f}\n".format(id_entrainement, np.mean(tab_accuracy_train), np.mean(tab_accuracy_test)))
+    fichier.close()
+     
+

Tensorflow/tutoriel10/README.md

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+# Tutoriel tensorflow
+## Surapprentissage: complétion du dataset
+
+La vidéo de ce tutoriel est disponible à l'adresse suivante: https://www.youtube.com/watch?v=rLSnx0LiObo
+
+## CIFAR10
+
+N'oubliez pas de récuperer la base cifar10 (binary version) à l'adresse suivante:
+https://www.cs.toronto.edu/~kriz/cifar.html
+
+### Courbes d'erreur sur la base de validation:
+![graph apprentissage](https://github.com/L42Project/Tutoriels/blob/master/Tensorflow/tutoriel10/Figure_1.png)
+
+L'apprentissage prend 2h50 sur une GeForce 1080
+

Tensorflow/tutoriel10/vgg.py

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+import tensorflow as tf
+import numpy as np
+
+def convolution(couche_prec, taille_noyau, nbr_noyau):
+    w=tf.Variable(tf.random.truncated_normal(shape=(taille_noyau, taille_noyau, int(couche_prec.get_shape()[-1]), nbr_noyau)))
+    b=np.zeros(nbr_noyau)
+    result=tf.nn.conv2d(couche_prec, w, strides=[1, 1, 1, 1], padding='SAME')+b
+    return result
+        
+def fc(couche_prec, nbr_neurone):
+    w=tf.Variable(tf.random.truncated_normal(shape=(int(couche_prec.get_shape()[-1]), nbr_neurone), dtype=tf.float32))
+    b=tf.Variable(np.zeros(shape=(nbr_neurone)), dtype=tf.float32)
+    result=tf.matmul(couche_prec, w)+b
+    return result
+
+def vggnet(nbr_classes, learning_rate=1E-3, momentum=0.99):
+    ph_images=tf.placeholder(shape=(None, 32, 32, 3), dtype=tf.float32, name='images')
+    ph_labels=tf.placeholder(shape=(None, nbr_classes), dtype=tf.float32)
+    ph_is_training=tf.placeholder_with_default(False, (), name='is_training')
+    
+    result=convolution(ph_images, 3, 64)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.layers.dropout(result, 0.2, training=ph_is_training)
+    result=tf.nn.relu(result)
+    result=convolution(result, 3, 64)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.2, training=ph_is_training)
+    result=tf.nn.max_pool(result, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME')
+    
+    result=convolution(result, 3, 128)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.2, training=ph_is_training)
+    result=convolution(result, 3, 128)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.3, training=ph_is_training)
+    result=tf.nn.max_pool(result, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME')
+    
+    result=convolution(result, 3, 256)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.3, training=ph_is_training)
+    result=convolution(result, 3, 256)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.3, training=ph_is_training)
+    result=convolution(result, 3, 256)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.3, training=ph_is_training)
+    result=tf.nn.max_pool(result, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME')
+    
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.3, training=ph_is_training)
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.4, training=ph_is_training)
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.4, training=ph_is_training)
+    result=tf.nn.max_pool(result, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME')
+    
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.4, training=ph_is_training)
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.4, training=ph_is_training)
+    result=convolution(result, 3, 512)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.nn.relu(result)
+    result=tf.layers.dropout(result, 0.5, training=ph_is_training)
+    result=tf.nn.max_pool(result, ksize=[1, 2, 2, 1], strides=[1, 2, 2, 1], padding='SAME')
+    result=tf.contrib.layers.flatten(result)
+    
+    result=fc(result, 1024)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.layers.dropout(result, 0.5, training=ph_is_training)
+    result=tf.nn.relu(result)
+    result=fc(result, 1024)
+    result=tf.layers.batch_normalization(result, training=ph_is_training, momentum=momentum)
+    result=tf.layers.dropout(result, 0.5, training=ph_is_training)
+    result=tf.nn.relu(result)
+    result=fc(result, nbr_classes)
+    socs=tf.nn.softmax(result, name="sortie")
+    
+    loss=tf.nn.softmax_cross_entropy_with_logits_v2(labels=ph_labels, logits=result)
+    extra_update_ops=tf.get_collection(tf.GraphKeys.UPDATE_OPS)
+    with tf.control_dependencies(extra_update_ops):
+        train=tf.train.AdamOptimizer(learning_rate).minimize(loss)
+    accuracy=tf.reduce_mean(tf.cast(tf.equal(tf.argmax(socs, 1), tf.argmax(ph_labels, 1)), tf.float32))
+
+    return ph_images, ph_labels, ph_is_training, socs, train, accuracy, tf.train.Saver()
+