How to solve the problem that only the process remains when you press cross on the imshow screen of OpenCV
environment
Python 3.7.8 　OpenCV 3.4.2
problem
For example, this image of Lena.
Normally, display the image with the following code and press the appropriate key to close the window. However, when I press the close button, the window closes but the python process remains running.
open.py
import cv2
img = cv2.imread("lena.jpg ")
#Display image
cv2.imshow("img", img)
cv2.waitKey(0)
cv2.destroyAllWindows()
Solution
It's basically the same as Other method, but with a little shorter code and everything as before. Originality is also compatible with the key input of.
python
import cv2
img = cv2.imread("lena.jpg ")
while(1):
cv2.imshow('img', img)
key = cv2.waitKey(100) & 0xff
if key != 255 or cv2.getWindowProperty('img', cv2.WND_PROP_AUTOSIZE) == -1:
cv2.destroyAllWindows()
exit()
I hope it helps those who are in trouble with the same thing.
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