• opencv-python: https://pypi.org/project/opencv-python/
• opencv-contrib-python: https://pypi.org/project/opencv-contrib-python/
• opencv-python-headless: https://pypi.org/project/opencv-python-headless/
• opencv-contrib-python-headless: https://pypi.org/project/opencv-contrib-python-headless/

OpenCV version 3.4.4.

Thanks to Ivan Pozdeev for following fixes and enhancements: #135, #136, #141, #144, #145, #146, #147, #149, #150