https://www.cnblogs.com/botoo/p/8416315.html

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from PIL import Image
from PIL import ImageChops 

def compare_images(path_one, path_two, diff_save_location):
    """
    比较图片，如果有不同则生成展示不同的图片
 
    @参数一: path_one: 第一张图片的路径
    @参数二: path_two: 第二张图片的路径
    @参数三: diff_save_location: 不同图的保存路径
    """
    image_one = Image.open(path_one)
    image_two = Image.open(path_two)
    try: 
        diff = ImageChops.difference(image_one, image_two)
 

        if diff.getbbox() is None:
        # 图片间没有任何不同则直接退出
            print("【+】We are the same!")
        else:
            diff.save(diff_save_location)
    except ValueError as e:
        text = ("表示图片大小和box对应的宽度不一致，参考API说明：Pastes another image into this image."
                "The box argument is either a 2-tuple giving the upper left corner, a 4-tuple defining the left, upper, "
                "right, and lower pixel coordinate, or None (same as (0, 0)). If a 4-tuple is given, the size of the pasted "
                "image must match the size of the region.使用2纬的box避免上述问题")
        print("【{0}】{1}".format(e,text))

 
if __name__ == '__main__':
    compare_images('1.png',
                   '2.png',
                   '我们不一样.png')