Algorithms for user detection and authentication based on face analysis

Nowadays, there are many methods for identifying people, but most common and probably the oldest one is identification based on face recognition. Even though for people this method is natural, for computers it is a very challenging and complex problem. This paper describes one the known approaches for face recognition, which uses principal component analysis to compare and recognize faces. Obviously, a before face is recognized, it has to be detected. For process of detection, method based on Haar features is used.