A three-step system calibration procedure with error compensation for 3D shape measurement  

作　　者：崔海华 廖文和 程筱胜 戴宁 袁天然 

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics

出　　处：《Chinese Optics Letters》2010年第1期33-37,共5页中国光学快报（英文版）

基　　金：supported partially by the National"863"Program of China(No.2005AA420240);the Doctoral Foundation of the Ministry of Education of China(No.20070287055)

摘　　要：System calibration, which usually involves complicated and time-consuming procedures, is crucial for any three-dimensional （3D） shape measurement system based on vision. A novel improved method is proposed for accurate calibration of such a measurement system. The system accuracy is improved with considering the nonlinear measurement error created by the difference between the system model and real measurement environment. We use Levenberg-Marquardt optimization algorithm to compensate the error and get a good result. The improved method has a 50% improvement of re-projection accuracy compared with our previous method. The measurement accuracy is maintained well within 1.5% of the overall measurement depth range.System calibration, which usually involves complicated and time-consuming procedures, is crucial for any three-dimensional （3D） shape measurement system based on vision. A novel improved method is proposed for accurate calibration of such a measurement system. The system accuracy is improved with considering the nonlinear measurement error created by the difference between the system model and real measurement environment. We use Levenberg-Marquardt optimization algorithm to compensate the error and get a good result. The improved method has a 50% improvement of re-projection accuracy compared with our previous method. The measurement accuracy is maintained well within 1.5% of the overall measurement depth range.

关 键 词：BIREFRINGENCE CALIBRATION Error compensation MEASUREMENTS Model structures 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]