CODEWITHSUNDEEP
pythonopencv
Amarth Gûl
Amarth Gûl

Reputation: 1080

openCV waitKey() can't get proper keyboard input

I followed a tutorial, and tried to make the program quit when I press q, but that doesn't work, it quits no matter which key I press, that's the code:

twi = cv2.imread('large.png')
cv2.namedWindow('image', cv2.WINDOW_NORMAL)
cv2.imshow('image', twi)
key = cv2.waitKey(0)
if key == ord('q'):
    cv2.destroyAllWindows()

And I've tried to add &0xFF:

key = cv2.waitKey(0)&0xFF

Still not working, what is wrong with it? Can I fix it?

=============Update============

I added print(key) to that, when pressing q, variable key is 113, and ord('q') is 113 either, can't understand why it doesn't work...

=============Solved=============

(Seems that I forget how if works...)

Upvotes: 1

Views: 3803

Answers (1)

ikkuh
ikkuh

Reputation: 4603

Continuously calling cv2.waitKey(0) when it doesn't return the key value for the q key might work:

while cv2.waitKey(0) != ord('q'):
    pass
cv2.destroyAllWindows()

Upvotes: 6

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