The actual monitoring scenes are usually complex and alterable. It is a challenge to detect and track the moving objects accurately, and it is also a basis for the following procedures in intelligent visual surveillance system such as multicamera integration, behavior understanding and description. 实际的场景往往是错综复杂、变化无常的,而能准确地对运动目标进行检测与跟踪,是智能视觉监控系统中多摄像机融合、行为理解和描述等后续处理的基础。