本文总结了三篇论文的知识，并且存在前置依赖关系。这三篇论文分别是：
RobustReal-time Face Detection
Fast Rotation Invariant Multi-View FaceDetection Based on Real Adaboost
Tracking in Low Frame Rate Video: ACascade Particle Filter with Discriminative Observers of Different Lifespans
这三篇论文我以ppt的形式做了如下总结：