画像モザイク効果アルゴリズム|python

import cv2
import numpy as np
img = cv2.imread('image0.jpg',1)
imgInfo = img.shape
height = imgInfo[0]
width = imgInfo[1]
for m in range(100,300):
	for n in range(100,200):
		#pixel->10*10
		if m%10==0 and n%10==0:
			for i in range(0,10):
				for j in range(0,10):
					(b,g,r) = img[m,n]
					img[i+m,j+n] = (b,g,r)
cv2.imshow('dst',dst)
cv2.waitKey(0)