Journal of Applied Optics, Volume. 44, Issue 2, 371(2023)

Line structured light calibration system based on planar complementary target

Yusheng ZHAI1...2, Ben YANG1,2, Zhifeng ZHANG1,2,*, Rui WANG1,2, Haiqi XI1,2, Shangshang LI1,2, Lijie GENG1,2, Ruiliang ZHANG1,2, and Cuifang KUANG23 |Show fewer author(s)
Author Affiliations
  • 1Henan Key Laboratory of Magnetoelectronic Information Functional Materials, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
  • 2Zhengzhou Key Laboratory of Information Optics and Photoelectric Technology, School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
  • 3State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
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    To improve the calibration efficiency and accuracy of line structured light sensor, a plane checkerboard and concentric circle complementary line structured light calibration system was designed integrating with self-backlighting and pose-adjustable functions. Based on the geometric relationship between the real projection position of the concentric circle center and the center of projection ellipse, the nonlinear optimized compensation model for eccentric error was established, which precisely determined the eccentric error compensation position of the circle center under the perspective projection. Compared with the traditional calibration method, the proposed method reduced the re-projection error by 84.7% and effectively solved the problem of high-precision calibration for eccentric error compensation of circular markers. By combining the plane passing through the optical center and the center line of the light bar with the target plane in the camera coordinate system, the coordinate information of the spatial intersection lines was obtained for many times to increase the feature points, and the problem of lower calibration precision of plane fitting due to the fewer feature points was solved by using the least square method to fit the optic plane equation. In complex environments, the average error of the outer diameter of the large-size grinding wheel is 0.005 1 mm measured by repeated experiments, and the results show that the designed calibration system has certain precision, simplicity, and practicability.

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    Yusheng ZHAI, Ben YANG, Zhifeng ZHANG, Rui WANG, Haiqi XI, Shangshang LI, Lijie GENG, Ruiliang ZHANG, Cuifang KUANG. Line structured light calibration system based on planar complementary target[J]. Journal of Applied Optics, 2023, 44(2): 371

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    Paper Information

    Category: Research Articles

    Received: Sep. 21, 2022

    Accepted: --

    Published Online: Apr. 14, 2023

    The Author Email: ZHANG Zhifeng (fengzz9276@sina.com)

    DOI:10.5768/JAO202344.0203002

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