利用opencv库函数打开摄像头，点击保存图片按钮就可以保存图片，点击测距按钮就可以测试出点高度及点宽度还有距离。点击关闭摄像头即可关闭摄像头，点击推出程序即可退出程序。-Using the opencv library function to open the camera, click the save picture button to save the picture, click the distance button can test the point height and poi