摘要
相位偏折测量系统的标定是影响其测量精度的重要因素。针对立体相位偏折测量系统中显示屏和相机位姿关系标定困难的问题,研究了一种新的系统标定方法。通过在显示屏上构造特征点,引入摄影测量系统作为显示屏坐标系与相机坐标系的转换中介,实现了显示屏坐标系与相机坐标系转换关系的高精度标定。搭建立体偏折系统进行标定精度验证,得到的重建表面平面度结果小于1μm,这证明了本标定方法的可行性和有效性。
The calibration of the phase measuring deflectometry(PMD)system is an important factor affecting the accuracy.Aiming at the difficulty of the calibration of posture relationship between the screen and camera in PMD system,a new system calibration method is proposed.By constructing retro-reflectors on the screen,a photogrammetry system is introduced as the medium of transformation between the screen coordinate system and the camera coordinate system.Therefore,a high precision calibration of geometric parameters is achieved.The calibration accuracy is verified using a stereo PMD system.The experimental results show that the reconstruction surface flatness is less than 1μm,which demonstrates that the proposed method is feasible and effective.
作者
刘方明
林嘉睿
孙岩标
邾继贵
Liu Fangming;Lin Jiarui;Sun Yanbiao;ZhuJigui(State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin 300072,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第5期128-135,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51775380,41701522)
国家自然科学基金创新研究群体项目(51721003)
天津市自然科学基金(17JCQNJC07500)。
关键词
测量
标定
相位偏折术
立体视觉
镜面物体
摄影测量
measurement
calibration
phase measuring deflectometry
stereo vision
specular object
photogrammetry
