Image Library Documentation: OpenCV, SKImage, PIL

User Guide

Scikit Image: https://scikit-image.org/docs/dev/user_guide.html

OpenCV: https://docs.opencv.org/2.4/doc/user_guide/user_guide.html

https://opencv-python.readthedocs.io/en/latest/index.html

https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_tutorials.html

PIL: https://pillow.readthedocs.io/en/stable/