utils.py 文件源码

def load_image_from_buf(buf):
    """Reads an image from a buffer in memory. Image is being converted to grayscale and resized."""
    if len(buf) == 0:
        raise ImageLoaderError()
    image = cv2.imdecode(numpy.frombuffer(buf, numpy.uint8), cv2.IMREAD_GRAYSCALE)
    if image is None:
        raise ImageLoaderError()
    return convert_image(image)