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- model.predict_generator(test_generator)
- data = img.astype(float)/255
- model.predict(data)
- def Get_generator_data(dir,img_width, img_height, batch_size):
- datagen = ImageDataGenerator(rescale=1. / 255)
- train_generator = datagen.flow_from_directory(
- dir,
- target_size=(img_width, img_height),
- batch_size=batch_size,
- class_mode='categorical',
- shuffle=False)
- return train_generator
- def create_model(outNeron, size):
- # Загружаем предварительно обученную нейронную сеть VGG16
- vgg16_net = VGG16(weights='imagenet', include_top=False,
- input_shape=(size, size, 3))
- # "Замораживаем" веса предварительно обученной нейронной сети VGG16
- vgg16_net.trainable = False
- # Создаем составную нейронную сеть на основе VGG16
- # Создаем последовательную модель Keras
- model = Sequential()
- # Добавляем в модель сеть VGG16 вместо слоя
- model.add(vgg16_net)
- # Добавляем в модель новый классификатор
- model.add(Flatten())
- model.add(Dense(256))
- model.add(Activation('relu'))
- model.add(Dropout(0.5))
- model.add(Dense(outNeron))
- model.add(Activation('softmax'))
- return model
- def Train_Model (model, train_generator, nb_train_samples, batch_size, val_generator, nb_validation_samples):
- сheckpoint = ModelCheckpoint('save/mnist-dense.hdf5',
- monitor='val_acc',
- save_best_only=True)
- # Компилируем составную нейронную сеть
- model.compile(loss=losses.categorical_crossentropy,
- optimizer=Adam(lr=1e-5),
- metrics=['accuracy'])
- # Обучаем модель с использованием генераторов
- model.fit_generator(
- train_generator,
- steps_per_epoch=nb_train_samples // batch_size,
- epochs=35,
- validation_data=val_generator,
- validation_steps=nb_validation_samples // batch_size,
- callbacks=[сheckpoint])
- Layer (type) Output Shape Param #
- =================================================================
- vgg16 (Model) (None, 1, 1, 512) 14714688
- _________________________________________________________________
- flatten (Flatten) (None, 512) 0
- _________________________________________________________________
- dense (Dense) (None, 256) 131328
- _________________________________________________________________
- activation (Activation) (None, 256) 0
- _________________________________________________________________
- dropout (Dropout) (None, 256) 0
- _________________________________________________________________
- dense_1 (Dense) (None, 4) 1028
- _________________________________________________________________
- activation_1 (Activation) (None, 4) 0
- =================================================================
- Total params: 14,847,044
- Trainable params: 132,356
- Non-trainable params: 14,714,688
- _________________________________________________________________
- None
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