基于误差校正的高精度三维测量系统  

Accurate Three Dimensional Measurement System Based on Error Correction

作　　者：李博宇 LI Bo-yu(Information Technology Center,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院信息中心,北京100095

出　　处：《测控技术》2023年第1期99-105,共7页Measurement & Control Technology

基　　金：国家自然科学基金重点国际合作研究项目(61620106012)。

摘　　要：基于投影仪的结构光三维测量系统已得到了广泛的应用,但由于投影仪与相机的非线性特点,使用现有相位恢复算法得到的相位值具有一定的误差,影响了三维测量的精度。提出了一种基于二次型误差校正的高精度相位恢复算法。通过对标准平板进行相位恢复,分析其误差分布特征;用二次多项式对该误差进行逼近,得到误差的分布规律;根据求出的二次型误差模型对投影仪结构光系统得到的初始相位值进行修正,得到了高精度的相位恢复结果。实验表明,该算法比现有算法具有更高的相位恢复和三维测量精度。Three dimensional(3D) measurement system based on structured light using projectors has been widely used.However, due to the nonlinear characteristics of projectors and cameras, the phase value obtained by using the existing phase retrieval algorithm has a certain error, which affects the accuracy of 3D measurement.A high-precision phase retrieval algorithm based on quadratic error correction is proposed to decrease retrieval errors.The error distribution of the standard plate is analyzed by phase retrieval.The error is approximated by quadratic polynomial to obtain the error distribution rule.According to the quadratic error model, the initial phase value obtained by the projector structured light system is corrected, and the high-precision phase retrieval result is obtained.Experimental results show that the proposed algorithm has better performances on phase retrieval and 3D measurement than existing algorithms.

关 键 词：结构光系统 相位恢复 误差校正 三维测量 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]