基于线结构光的三维测量系统转轴快速标定方法  

A fast approach for calibrating 3-D coordinate measuring system rotation axis based on line-structure light

作　　者：李鹏飞[1] 张文涛[1] 熊显名[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《微型机与应用》2015年第4期73-75,共3页Microcomputer & Its Applications

基　　金：桂林市科学研究与技术开发课题(20130122-1);广西科学研究与技术开发课题(桂科合1346010-5)

摘　　要：为了标定基于线结构光的三维测量系统中的旋转轴,提出了一种基于圆锥体参照物的快速标定方法。将一个圆锥体的参照物固定放置在旋转平台上,控制旋转台每隔一定角度旋转一次,分别采集每个位置的图像,对图像预处理后,提取圆锥体的亚像素边缘,通过拟合圆锥体边缘直线,计算得到两条边缘直线的空间直线方程,并利用Levenberg-Marquardt迭代法计算出空间中距离两条边缘直线最近的点作为圆锥体的顶点,然后根据得到的所有顶点拟合出所在的空间平面及空间圆的圆心,根据平面的法向量和圆心点建立起旋转轴的直线方程,完成旋转台的转轴标定。实验结果表明,该标定方法具有较高的标定精度。In order to calibrate the 3-D coordinate measuring system rotation axis based on line-structure light, this paper presents a fast calibration method based on circular cone reference. Placing a cone on the rotary platform, controling rotary table at a degree rotation time, collecting the picture of each position, extractiing the cone sub-piexl edge after preprocessing the image, fitting the straight edge, calculating the line space straight equation of edge and the space distance between two edge line neareast point as the apex of a cone by using Levenberg-Marquardt iterative method, then fitting space plane and center of space circle according to the obtained all vertex, establishing the rotating shaft of linear equation refer ring to the normal vector and center, and finally completing the rotating shaft station calibration. According to the experiment results, the calibration method has higher calibration precision.

关 键 词：圆锥体 线结构光 旋转台 标定 

分 类 号：TN911.73[电子电信—通信与信息系统]