基于Tsai两步法的共面圆标定程序。有误差分析。解压即可用。main为主程序。运行速度快。不同的图片修改main主程序即可。-Yuan Tsai two-step method based coplanar calibration procedures. Error analysis. Decompression can be used. main main program. Running fast. Different picture to modify the main main prog