Research on calibration method of stereo photography system for detecting three-dimensional position of optical fibers

Kai Yun; Jiahao Zhou; Yingfu Wang; Ziming Liu; Rongfeng Chen; Hongzhuan Hu; Jianping Wang; Zhigang Liu; Jirchu Chu; Ping Zhang; Zengxiang Zhou

doi:10.1117/12.3019711

26 August 2024 Research on calibration method of stereo photography system for detecting three-dimensional position of optical fibers

Kai Yun, Jiahao Zhou, Yingfu Wang, Ziming Liu, Rongfeng Chen, Hongzhuan Hu, Jianping Wang, Zhigang Liu, Jirchu Chu, Ping Zhang, Zengxiang Zhou

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131004H (2024) https://doi.org/10.1117/12.3019711
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The high-precision calibration technique of stereo photography systems plays a crucial role in determining the three-dimensional position of LAMOST fibers. This paper proposes an improved calibration method for stereo photography systems. Firstly, building upon four sets of purely translational vertical movements, precise camera intrinsic parameters can be obtained by compensating for verticality errors. Secondly, a principal point estimation model with varying focal lengths effectively reduces the strong coupling of camera intrinsic parameters. Finally, a precise global optimization method based on the coplanarity of chessboard grid corner points is proposed. Experimental results demonstrate that the single-target calibration reprojection error of this method can be reduced to as low as 0.0697 pixels, with a stereo distance measurement accuracy of up to 99.9806%.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Kai Yun, Jiahao Zhou, Yingfu Wang, Ziming Liu, Rongfeng Chen, Hongzhuan Hu, Jianping Wang, Zhigang Liu, Jirchu Chu, Ping Zhang, and Zengxiang Zhou "Research on calibration method of stereo photography system for detecting three-dimensional position of optical fibers", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131004H (26 August 2024); https://doi.org/10.1117/12.3019711

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