Laser & Optoelectronics Progress, Volume. 58, Issue 13, 1312001(2021)

Target and Decoding Method Based on Projective Invariance Principle

Jingxuan Wang, Yi Wang*, Jiachen Zhang, Huaiyu Cai, and Xiaodong Chen
Author Affiliations
  • Key Laboratory of Photoelectric Information, Ministry of Education, School of Precision Instruments and Optoelectronic Engineering, Tianjin University, Tianjin 300072, China
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    Figures & Tables(14)
    Wiring harness diagram
    Coding target composition. (a) Target templates; (b) corresponding name of coding circle; (c) example of coding targets
    Three wire harnesses for one target. (a) Situation 1; (b) situation 2; (c) situation 3
    Decoding process of target
    Experiment scenes and some equipment. (a) Experimental test scenarios; (b) goniometer; (c) three targets for test
    White boards shot at different oblique angles. (a) 0∘; (b) 30∘; (c) 60∘
    Error bar graphs of 9 targets at different inclination angles
    Plane target coordinate system
    Cylindrical coordinate system
    Mean difference of cross ratio between plane and cylinder of target
    Schematic of commonly used traditional targets. (a) Hattori target template; (b) Hattori target; (c) Schnerider target template; (d) Schnerider target
    Decoding accuracy rate of three targets at different tilt angles
    • Table 1. Decoding accuracy at different tilt angles

      View table

      Table 1. Decoding accuracy at different tilt angles

      Tilt angle /(°)01020304050606570
      Decoding accuracy rate /%1001001001001001001007856
    • Table 2. Error mean and variance of 9 targets at different tilt angles

      View table

      Table 2. Error mean and variance of 9 targets at different tilt angles

      Tilt angle /(°)Mean valueVariance
      00.0006467.84×10-7
      100.0003832.40×10-7
      200.0007325.33×10-7
      300.0008359.26×10-7
      400.0009901.13×10-6
      500.0010842.00×10-6
      600.0013692.07×10-6
      650.0823500.033334
      700.3903270.152914
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    Jingxuan Wang, Yi Wang, Jiachen Zhang, Huaiyu Cai, Xiaodong Chen. Target and Decoding Method Based on Projective Invariance Principle[J]. Laser & Optoelectronics Progress, 2021, 58(13): 1312001

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Oct. 20, 2020

    Accepted: Dec. 14, 2020

    Published Online: Jul. 14, 2021

    The Author Email: Wang Yi (koala_wy@tju.edu.cn)

    DOI:10.3788/LOP202158.1312001

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