OpenCV的研究2

#!/usr/bin/env python
#-*- coding:utf-8 -*-
import numpy as np
import cv2
img = cv2.imread('img/nxp.png',cv2.IMREAD_UNCHANGED)
cv2.imshow('image',img)
k = cv2.waitKey(0)
if k == ord('s'): # wait for 's' key to save and exit
    cv2.imwrite('1.png',img)
    cv2.destroyAllWindows()
else:
    cv2.destroyAllWindows()