cv3.io.wait_key

cv3.io.wait_key(t)[source]

Wait for a keyboard event.

Parameters:: t (int) – Delay in milliseconds. If 0, it waits indefinitely for a key stroke.
Returns:: The code of the pressed key, or -1 if no key was pressed before the timeout.
Return type:: int

Note

This function is a wrapper around cv2.waitKey() that masks the return value with 0xFF to ensure consistent behavior across different platforms.

Example

>>> import cv3
>>> # Wait for a key press for 1 second
>>> key = cv3.wait_key(1000)
>>> if key != -1:
...     print(f'Key pressed: {key}')