net.py 文件源码

def build_model(nb_classes):
    base_model = InceptionV3(weights='imagenet', include_top=False)

    # add a global spatial average pooling layer
    x = base_model.output
    x = GlobalAveragePooling2D()(x)
    # let's add a fully-connected layer
    x = Dense(1024, activation='relu')(x)
    # and a logistic layer
    predictions = Dense(nb_classes, activation='softmax')(x)

    # this is the model we will train
    model = Model(input=base_model.input, output=predictions)

    # first: train only the top layers (which were randomly initialized)
    # i.e. freeze all convolutional InceptionV3 layers
    for layer in base_model.layers:
        layer.trainable = False

    # compile the model (should be done *after* setting layers to non-trainable)
    print "starting model compile"
    compile(model)
    print "model compile done"
    return model