Rebuild the library with Windows, GTK+ 2.x or Cocoa support

error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support

There are many methods online, and this one successfully solved my problem.

Rebuild the library with Windows, GTK+ 2.x or Cocoa support

1. pip installs opencv-contrib-python. Note that the opencv-contrib-python version must be consistent with the opencv version.
2. Run the following commands respectively:

Uninstall opencv-python-headless:

pip uninstall opencv-python-headless -y 

Update opencv version:

pip install opencv-python --upgrade