背景差和帧差法实现运动人体的跟踪，具有搞噪声和消除大部分阴影功能-Background difference and frame difference method to achieve motion tracking of the human body, has engaged in the shadow of the noise and the elimination of most of the functionality

运动目标检测和跟踪，用的是水平集方法和二次帧差法实现-Moving target detection and tracking