Then we are reading the image that is to be displayed as the output on the screen until a keyboard event takes place, using imread() function. In the above program, the necessary module cv2 is imported. The output is shown in the snapshot above. We are then using the waitKey() function to display the image as the output on the screen until a keyboard event occurs. #using waitKey() function to display the image as the output on the screen until a keyboard event takes place Imageread = cv.imread('C:/Users/admin/Desktop/images/educba.jpg')
#reading the image that is to be displayed as the output on the screen until a keyboard event takes place, using imread() function In python, the OpenCV program demonstrates the waitKey() function to display an image as the output of the program until a key is pressed on the keyboard. Given below are the examples of OpenCV waitKey: Example #1 The waitKey() function returns -1 if no keyboard events happen within the time specified in milliseconds as an argument to the waitKey() function.As a result, the image or video to be displayed is displayed as long as no key is pressed on the keyboard. By passing the value 0 or any negative value as an argument to the waitKey() function, the currently running thread waits infinitely for the keyboard events to happen.The image or video to be displayed using waitKey() function disappears once the delay time specified in milliseconds as an argument to the waitKey() function is over.The time for which the currently running thread should wait for the keyboard events to happen is specified in milliseconds and passed as an argument to the waitKey() function.To display a given image or a frame from a given video for a certain amount of time, we make use of a function called waitKey() function in OpenCV.
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