OpenCV

Introductions

https://opencv.org/ https://github.com/opencv/opencv https://github.com/topics/opencv https://github.com/search?q=Awesome+opencv&type=Repositories

OpenCV (Open Source Computer Vision Library) is a library of programming functions mainly for real-time computer vision.1 Originally developed by Intel, it was later supported by Willow Garage, then Itseez (which was later acquired by Intel2). The library is cross-platform and licensed as free and open-source software under Apache License 2. Starting in 2011, OpenCV features GPU acceleration for real-time operations.3

Source: https://en.wikipedia.org/wiki/OpenCV

Put simply, one of the most commonly used image processing libraries is OpenCV.