Laser & Optoelectronics Progress, Volume. 56, Issue 11, 111504(2019)

Design and Modeling of Visual Pose Measuring System with Large Vision Range

Kai Zhou*, Xiangjun Wang, Zhong Wang, and Zijing Wan
Author Affiliations
  • State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China
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    Figures & Tables(17)
    Structure of system
    Distribution of field of view
    Left camera group for far-segmented measurement
    Plane camera for near-segmented measurement
    Equivalent imaging model of line camera
    Positioning model of 4-line-camera
    Imaging model of plane camera for near-segmented measurement
    Cooperative target used in measurement experiment
    Segmented pose measurement system
    Image peaks of one outer ring LED on the four line array CCDs with vision range of 35 m. (a) Camera 1L; (b) camera 1R; (c) camera 2L; (d) camera 2R
    Image of inner ring LEDs on plane array camera with vision range of 5 m
    Distributions of calibration points and verification points in far-segmented measurement experiment
    Coordinate reconstruction errors of calibration points in X, Y, and Z directions
    Variation of attitude angle measurement result with time when target is 1 m away from camera. (a) Rolling angle; (b) pitching angle; (c) yaw angle
    Variation of attitude angle measurement result with time when target is 3 m away from camera. (a) Rolling angle; (b) pitching angle; (c) yaw angle
    • Table 1. Root mean square error and relative error of calibration points

      View table

      Table 1. Root mean square error and relative error of calibration points

      RMSE /mmRelative error /%
      XYZMaximumAverage
      7.482.3533.420.370.13
    • Table 2. Measurement results of three-dimensional coordinates of random verification points

      View table

      Table 2. Measurement results of three-dimensional coordinates of random verification points

      PointnumberTrue position /mmConstructed position /mmAbsolute error /mmRelativeerror /%
      XYZXYZXYZ
      1-2420-1109680-2423.4-107.39673.7-3.42.7-6.30.08
      2-4840-132030250-4834.2-1323.730296.55.8-3.746.50.15
      35060-1100181505069.0-1098.618116.19.01.4-33.90.19
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    Kai Zhou, Xiangjun Wang, Zhong Wang, Zijing Wan. Design and Modeling of Visual Pose Measuring System with Large Vision Range[J]. Laser & Optoelectronics Progress, 2019, 56(11): 111504

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    Paper Information

    Category: Machine Vision

    Received: Nov. 30, 2018

    Accepted: Jan. 7, 2019

    Published Online: Jun. 13, 2019

    The Author Email: Zhou Kai (d_zhou@tju.edu.cn)

    DOI:10.3788/LOP56.111504

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