中国激光, 2009, 36 (1): 182, 网络出版: 2009-02-10   

线结构光三维轮廓测量系统的标定方法

Calibration Method for Three-Dimensional Measurement System Based on Linear-Structure Light
作者单位
西安交通大学机械制造系统工程国家重点实验室, 陕西 西安 710049
摘要
在线结构光360°三维轮廓测量方法中, 采用多图像传感器系统可实现物体整体轮廓及局部形貌细节同时高精度测量。为了实现测量系统多传感器同时标定, 提出一种线结构光多传感器三维轮廓测量系统的标定方法。以直接线性变换法为系统标定模型, 设计含有多特征点的靶标控制场来解算系统模型参数, 应用二元全区间插值误差校正方法对物方坐标计算误差进行校正, 实现对整个测量系统的标定。并提出了一种基于二维离散傅里叶变换的多分辨率标定靶标特征点提取的新方法。论述了线结构光四传感器测量系统的标定过程。实验结果表明这种标定方法可实现多传感器测量系统高精度同时标定。
Abstract
Several cameras are used in three-dimensional(3D) measurement system with linear-structure light, to measure whole profile and partial detail of complex object with high-precision and 360° measurement range. A measurement system , which is composed of four cameras, has been developed . A new calibration method is presented to calibrate the cameras simultaneously. It uses direct linear transformation model and a self-designed drone control field with many control points to calculate the model parameters, and adopts duality interpolation to rectify the 3D coordinates of measured object . The calibration process of the system is particularly described . Furthermore, a novel method, which is based on two-dimensional discrete Fourier transform, to extract multi-resolution control points on drone is introduced. The result shows the method can calibrate several cameras synchronously for multi-sensor measurement system.

张维光, 赵宏, 张琦, 周翔. 线结构光三维轮廓测量系统的标定方法[J]. 中国激光, 2009, 36(1): 182. Zhang Weiguang, Zhao Hong, Zhang Qi, Zhou Xiang. Calibration Method for Three-Dimensional Measurement System Based on Linear-Structure Light[J]. Chinese Journal of Lasers, 2009, 36(1): 182.

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