dlib - Machine Learning Toolkit

dlib is a modern C++ toolkit that provides a wide array of machine learning algorithms and tools, exposed via a Python API. It is widely used for computer vision tasks such as state-of-the-art facial recognition, object detection, and image processing, as well as general machine learning applications including SVMs, clustering, and regression. The library is actively maintained, with frequent patch releases and occasional minor or major version bumps, the current version being 20.0.1.