Handling non-key or mouse events

edit savecancel

you do not have to "kill imshow()". all you have to do is "catch" the event you're looking for, and make it break the loop.

a typical program looks like this:

while True:
     img = cv2.imread("some_random.png")
     # some processing

     if my_event_happened:  # insert your event here!
            break

     cv2 imshow("I", img)
     cv2.waitKey(20)

note, that you still need the waitKey() call for showing the image !

also, take a look at the py gui tutorials .