Real-time compensation of projector lens distortion using a linear-grid model in fringe projection profilometry

被引:6
作者
Bai, Yi [1 ]
Zhang, Geyou [2 ]
Lau, Daniel L. [3 ]
Zhang, Bo [4 ]
Xu, Bin [4 ]
Liu, Kai [1 ]
机构
[1] Sichuan Univ, Coll Elect Engn, Chengdu, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Informat & Commun Engn, Chengdu, Peoples R China
[3] Univ Kentucky, Dept Elect & Comp Engn, Lexington, KY USA
[4] Sichuan Univ, Sch Mech Engn, Chengdu, Peoples R China
关键词
fringe projection profilometry; lens distortion correction; look-up tables; real-time; CALIBRATION METHOD; SYSTEM;
D O I
10.1117/1.OE.62.11.114103
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In fringe projection profilometry, applying pre-distortion to fringe patterns reduces the errors caused by projector lens distortion. However, it is important to note that discontinuous fringe patterns, such as binary fringe patterns, introduce additional errors when using pre-distortion methods. While post-undistortion methods are applicable for discontinuous fringe patterns, the computation is typically time-consuming. We propose a linear-grid model for correcting lens distortion. First, we select multiple equidistant points within the grid to calculate the linear parameters and store them as look-up tables (LUTs). Second, by rounding down the captured distorted point to the nearest integer point, we obtain the index value for LUTs. Finally, we achieve real-time compensation for distortion error through linear expressions. The experimental results show that the proposed effectively mitigates the distortion by a factor of 6x in terms of root mean squared error. Additionally, it exhibits a computational speed of 409.50 fps, which is an improvement compared to the traditional iterative model at 39.48 fps and the scale-offset model at 264.48 fps.
引用
收藏
页数:12
相关论文
共 29 条
[1]  
BROWN DC, 1971, PHOTOGRAMM ENG, V37, P855
[2]   High-quality fringe pattern generation using binary pattern optimization through symmetry and periodicity [J].
Dai, Junfei ;
Li, Beiwen ;
Zhang, Song .
OPTICS AND LASERS IN ENGINEERING, 2014, 52 :195-200
[3]   Calibration of fringe projection profilometry: A comparative review [J].
Feng, Shijie ;
Zuo, Chao ;
Zhang, Liang ;
Tao, Tianyang ;
Hu, Yan ;
Yin, Wei ;
Qian, Jiaming ;
Chen, Qian .
OPTICS AND LASERS IN ENGINEERING, 2021, 143
[4]   High-speed real-time 3-D coordinates measurement based on fringe projection profilometry considering camera lens distortion [J].
Feng, Shijie ;
Chen, Qian ;
Zuo, Chao ;
Sun, Jiasong ;
Yu, Shi Ling .
OPTICS COMMUNICATIONS, 2014, 329 :44-56
[5]   Accurate calibration method for a fringe projection system by projecting an adaptive fringe pattern [J].
Gonzalez, Andres ;
Meneses, Jaime .
APPLIED OPTICS, 2019, 58 (17) :4610-4615
[6]   Quaternary gray-code phase unwrapping for binary fringe projection profilometry [J].
He, Xiaoyu ;
Zheng, Dongliang ;
Kemao, Qian ;
Christopoulos, George .
OPTICS AND LASERS IN ENGINEERING, 2019, 121 :358-368
[7]   Lens distortion elimination for improving measurement accuracy of fringe projection profilometry [J].
Li, Kai ;
Bu, Jingjie ;
Zhang, Dongsheng .
OPTICS AND LASERS IN ENGINEERING, 2016, 85 :53-64
[8]   Accurate calibration method for a structured light system [J].
Li, Zhongwei ;
Shi, Yusheng ;
Wang, Congjun ;
Wang, Yuanyuan .
OPTICAL ENGINEERING, 2008, 47 (05)
[9]   Symmetrical Epipolar Features Over Normalized Camera/Projector Calibration Matrices for Real-Time Structured Light Illumination [J].
Liu, Kai ;
Ying, Songlin ;
Lau, Daniel L. ;
Zhu, Ce ;
Xu, Bin .
IEEE SIGNAL PROCESSING LETTERS, 2022, 29 :2268-2272
[10]   Extending epipolar geometry for real-time structured light illumination [J].
Liu, Kai ;
Zhang, Kangkang ;
Wei, Jinghe ;
Song, Jianwen ;
Lau, Daniel L. ;
Zhu, Ce ;
Xu, Bin .
OPTICS LETTERS, 2020, 45 (12) :3280-3283