Error: cv2.error: OpenCV(4.5.4) /tmp/pip-req-build-w88qv8vs/opencv/modules/highgui/src/window.cpp:1006: error: (-215:Assertion failed) size.width>0 && size.height>0 in function ‘imshow’
Check if there is a problem with the image path:

It is found that None ==> You cannot use “～” to formulate the path, just modify it to the full path: