说明：  ：利用机器视觉技术建立圆形零件检测系统，采用简单高效的标定方法和亚像素技术实现对圆孔和圆形零件的非接触精密测量
(: The use of machine vision technology to build a circular parts detection system, a simple and efficient calibration methods and technology to achieve sub-pixel on the round hole and round parts of the non-contact precision measurement)