程序中用opencv进行图像处理，通过虚拟键盘控制方向玩文件夹内的贪吃蛇游戏，实现最短路径规划及撞到墙或者撞到自身时的方向控制。-Opencv image processing procedures used by the direction of the virtual keyboard control to play the game Snake within a folder, to achieve the shortest path planning and hit the wall o