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 relat