该程序可以实现对于手势的跟踪和手的张开和闭合的识别以及在手张开的时候的上,下,左,右4个移动方向的识别,在单纯背景下的效果比较好.-The program can be achieved for the hand gesture tracking and identification of open and closed and open hand, when the up, down, left and right identify the direction of movement 4, i