Chinese Journal of Lasers, Volume. 47, Issue 3, 304008(2020)

High Camera Calibration Method Based on True Coordinate Computation of Circle Center

Lu Xiaodong1, Xue Junpeng2,3、*, and Zhang Qican3
Author Affiliations
  • 1Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics,Mianyang, Sichuan 621900, China
  • 2School of Aeronautics and Astronautics, Sichuan University, Chengdu, Sichuan 610065, China
  • 3College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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    Figures & Tables(9)
    Camera imaging model
    Planar target with dot array
    Imaging model of dot projection
    Iterative calibration process of single circular feature point on target
    Deviation between measurement and true value of feature points for the simulation picture. (a) Left view; (b) bottom left view
    Captured images and virtual elevation projections. (a) Captured image in left view; (b) captured image in front view; (c) captured image in right view; (d) virtual projection from Fig.6(a); (e) virtual projection from Fig.6(b); (f) virtual projection from Fig.6(c)
    The 8th calibration image. (a) Measurement and true value of feature points for the captured image; (b) enlarged view of a single feature circle
    • Table 1. Comparison of camera calibration accuracy between proposed method and traditional method pixel

      View table

      Table 1. Comparison of camera calibration accuracy between proposed method and traditional method pixel

      ParameterTraditionalmethodProposedmethod
      Re-projectionerrorEx0.10540.0538
      Ey0.10320.0394
    • Table 2. Experimental calibration results of the proposed method and traditional method pixel

      View table

      Table 2. Experimental calibration results of the proposed method and traditional method pixel

      ParametersTraditionalmethodProposedmethod
      Focal lengthfx2793.72794.3
      fy2793.52794.4
      Principal pointu0789.0789.2
      v0575.1573.9
      Re-projectionerrorEx0.1210.068
      Ey0.1310.075
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    Lu Xiaodong, Xue Junpeng, Zhang Qican. High Camera Calibration Method Based on True Coordinate Computation of Circle Center[J]. Chinese Journal of Lasers, 2020, 47(3): 304008

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    Paper Information

    Category: Measurement and metrology

    Received: Sep. 17, 2019

    Accepted: --

    Published Online: Mar. 12, 2020

    The Author Email: Junpeng Xue (jpxue@scu.edu.cn)

    DOI:10.3788/CJL202047.0304008

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