video.py 文件源码

def preprocess_frame(image, target_height=224, target_width=224):
    image = resize_frame(image, target_height, target_width)
    image = skimage.img_as_ubyte(image).astype(np.float32)
    # ???ILSVRC???????????BGR???
    image -= np.array([103.939, 116.779, 123.68])
    # ?BGR??????RGB????????????caffe????????RGB??
    image = image[:, :, ::-1]
    return image