meanshift算法实现目标的跟踪，由视频序列文件中提取出第一帧，定义目标区域，进行跟踪，动态显示跟踪结果 比较简单 已验 无错-meanshift target tracking algorithm, the video sequence to extract the first frame of the file, define the target area, tracking, dynamic display has been tracking the results of relatively simple error-free inspection