datasets.py 文件源码

def extract_vgg16_features(x):
    from keras.preprocessing.image import img_to_array, array_to_img
    from keras.applications.vgg16 import preprocess_input, VGG16
    from keras.models import Model

    # im_h = x.shape[1]
    im_h = 224
    model = VGG16(include_top=True, weights='imagenet', input_shape=(im_h, im_h, 3))
    # if flatten:
    #     add_layer = Flatten()
    # else:
    #     add_layer = GlobalMaxPool2D()
    # feature_model = Model(model.input, add_layer(model.output))
    feature_model = Model(model.input, model.get_layer('fc1').output)
    print('extracting features...')
    x = np.asarray([img_to_array(array_to_img(im, scale=False).resize((im_h,im_h))) for im in x])
    x = preprocess_input(x)  # data - 127. #data/255.#
    features = feature_model.predict(x)
    print('Features shape = ', features.shape)

    return features