图像位平面分解

import cv2
import numpy as np
img=cv2.imread('C:/Users/xpp/Desktop/Lena.png',0)#原始图像
cv2.imshow("img",img)
r,c=img.shape#图像的行和列
x=np.zeros((r,c,8),dtype=np.uint8)#图像的行
r=np.zeros((r,c,8),dtype=np.uint8)#图像的列
for i in range(8):
    x[:,:,i]=2**i
    for i in range(8):
        r[:,:,i]=cv2.bitwise_and(img,x[:,:,i])#按与位运算
        mask=r[:,:,i]>0
        r[mask]=255
        cv2.imshow(str(i),r[:,:,i])
cv2.waitKey()
cv2.destroyAllWindows()