视频跟踪是视频信息处理的一个重要研究方向。交通信息管理、公安刑事侦查过程中人的跟踪占有很大比例。基于人脸特征的视频跟踪主要研究视频信息中人脸特征的提取，人脸特征的对比算法，人的运动的分析方法，及跟踪方法，跟踪结果的表示。-　　　criminal investigation,anti-terrorism and military installations. Consequently, to recognize person identity speedy and exactly in large-scale crowd has become an important way to protect the public social security, guarantee national harmony and reinforce pre-warning capability in public safety.This paper designs a real time automatic face detection, tracking and recognition system for video, which can detect, track faces and recognize human identity within the scope of video. The system consists of three parts, which are multi-face detection, multi-face tracking and identity recognition.

　　　For face detection, this paper presents an face detection algorithm called Adaboost-ASM face detection algorithm, combines Adaboost face detection algorithm with the adaptive shape model (ASM), to solve the problem that Adaboost face detection algorithm recognizes the non-face region and complex region as a face region mistakenly.Finally, the Adaboost-ASM algorithm achieves the real time face