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Tensorflow/tutoriel9/CIFAR_10_vgg.py

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+import tensorflow as tf
+import numpy as np
+from sklearn.utils import shuffle
+import matplotlib.pyplot as plot
+import cv2
+import vgg
+
+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=200
+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)
+
+fichier=open("log", "a")
+with tf.Session() as s:
+    s.run(tf.global_variables_initializer())
+    tab_train=[]
+    tab_test=[]
+    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()
+     
+