运用meahshift实现对视频序列中运动目标进行动态跟踪， 跟踪目标位置大小通过对话窗口可任意设置， 内有测试视频，可直接观察跟踪演示效果-Video sequences using meahshift achieve dynamic tracking of moving targets, track the size of the target location, through dialogue window can be arbitrarily set within the t