此代码基于c++标准库，opencv和pcl点云库，可实现对摄像头调参，调用摄像头视频并读取画面中点的三维坐标获取点云数据-This code is based on c++ standard library, opencv and pcl point cloud library, can achieve the camera tuning, call the camera video and read the middle of the screen coordinates of the three points to obtain point cloud data