In [1]:

    

import cv2


    

In [2]:

    

img_org = cv2.imread('data/src/lena.jpg')
img_q95 = cv2.imread('data/src/lena_q95.jpg')
img_q50 = cv2.imread('data/src/lena_q50.jpg')


    

In [3]:

    

print(cv2.PSNR(img_org, img_q95))


    

    




39.02455758374567

In [4]:

    

print(cv2.PSNR(img_org, img_q50))


    

    




30.34829234238757

In [5]:

    

print(cv2.PSNR(img_org, img_org))


    

    




361.20199909921956

In [6]:

    

print(cv2.PSNR(img_org, img_q95, R=255))


    

    




39.02455758374567