Dlib library A toolkit for Real-world machine learning, computer vision, and data analysis in C++ (with Python bindings).
DLib is an open source modern library with many machine learning algorithms and supporting functionality like threading and networking. In recent update it has a lot many new things .
What makes DLib unique is that it is designed for both research use and creating machine learning applications.
It has machine learning algorithms and supports functionality like threading and networking.
Today in Computer vision for Face related application use of dlib Hog or MMOD CNN is the one of fastest method.
Checkout Dlib page http://dlib.net/
GitHub https://github.com/davisking/dlib
