inpainting.py 文件源码

def is_greyscale(im):
    """
    Check if image is monochrome (1 channel or 3 identical channels)
    """
    if im.mode not in ("L", "RGB"):
        raise ValueError("Unsuported image mode")

    if im.mode == "RGB":
        rgb = im.split()
        if ImageChops.difference(rgb[0],rgb[1]).getextrema()[1]!=0:
            return False
        if ImageChops.difference(rgb[0],rgb[2]).getextrema()[1]!=0:
            return False
    return True