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June 11, 2021

What does waitKey do in OpenCV?

What does waitKey do in OpenCV?

waitKey() is a keyboard binding function. Its argument is the time in milliseconds. The function waits for specified milliseconds for any keyboard event. If you press any key in that time, the program continues.

What happens if we pass 0 to waitKey () function for playing video?

waitKey(0) will pause your screen because it will wait infinitely for keyPress on your keyboard and will not refresh the frame( cap. read() ) using your WebCam. waitKey(1) will wait for keyPress for just 1 millisecond and it will continue to refresh and read frame from your webcam using cap.

What is CV waitKey?

The cv::waitKey(n) function in OpenCV is used to introduce a delay of n milliseconds while rendering images to windows. When used as cv::waitKey(0) it returns the key pressed by the user on the active window.

What is cv2 waitKey ()?

waitKey() is a keyboard binding function. The function waits for specified milliseconds for any keyboard event. The function waitKey() waits for a key event for a “delay” (here, 30 milliseconds). …