face recognition manufacturers < / a > on the mainstream technology of face recognition

The mainstream face recognition technology can be divided into three categories: Geometric feature-based method, template based method and model-based method

　　1. The method based on geometric features is early and traditional, which usually needs to be combined with other algorithms to have better results

　　2. Template based methods can be divided into correlation based matching method, feature face method, linear discriminant analysis method, singular value decomposition method, neural network method, dynamic connection matching method and so on

　　3. Model based methods include hidden Markov model, active shape model and active appearance model