主要完成的工作是在监控的场景中检测出运动的物体，去除干扰的背景，只留下感兴趣的目标即目标提取。目标提取,运动信息提取,PCA和诊间差分方法。-The major work done to monitor the scene in the moving objects detected, remove the background interference, leaving only the object extraction target of interest. Object extraction, motion information extraction, PCA, and consultation between the difference method.