回答

可以通过直方图

#!/usr/local/python3/bin/python3
# -*- coding: utf-8 -*
from PIL import Image
 
# 将图片转化为RGB
def make_regalur_image(img, size=(64, 64)):
    gray_image = img.resize(size).convert('RGB')
    return gray_image
 
# 计算直方图
def hist_similar(lh, rh):
    assert len(lh) == len(rh)
    hist = sum(1 - (0 if l == r else float(abs(l-r))/max(l,r))for l, r in zip(lh, rh))/len(lh)
    return hist
 
# 计算相似度
def calc_similar(li, ri):
    calc_sim = hist_similar(li.histogram(), ri.histogram())
    return calc_sim
 
if __name__ == '__main__':
    image1 = Image.open('/data/wwwroot/default/asset/testimg1.png')
    image1 = make_regalur_image(image1)
    image2 = Image.open('/data/wwwroot/default/asset/testimg2.png')
    image2 = make_regalur_image(image2)
    print("相似度",calc_similar(image1, image2))