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waitKey() contains the whole image drawing functionality / event loop, imshow() only copies an image pointer, so it's not only about processing keyboard input

no, you cannot replace or avoid it.

waitKey() contains the whole image drawing functionality / event loop, imshow() only copies an image pointer, so it's not only about processing keyboard input

no, as long as you use imshow(), you cannot replace or avoid it.

waitKey() contains the whole image drawing functionality / event loop, imshow() only copies an image pointer, so it's not only about processing keyboard input