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')

from PIL import Image

import math

import operator

from functools import reduce

def image_contrast(img1, img2):

    image1 = Image.open(img1)

    image2 = Image.open(img2)

    h1 = image1.histogram()

    h2 = image2.histogram()

    result = math.sqrt(reduce(operator.add,  list(map(lambda a,b: (a-b)**2, h1, h2)))/len(h1) )

    return result

if __name__ == '__main__':

    img1 = "./1.png"  # 指定图片路径

    img2 = "./2.png"

    result = image_contrast(img1,img2)

    print(result)