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Acta Optica Sinica, Volume. 41, Issue 15, 1510001(2021)

Gun Image Stabilization Calibration Method Based on Fitting Calibration Model

Xin Yue1, Liangliang Li2, Hongjun Wang1、*, Zhigang Lü2,3, and Bingcai Liu1
Author Affiliations
  • 1School of Optoelectronic Engineering, Xi'an Technological University, Xi'an, Shaanxi 710021, China
  • 2School of Electronic and Information Engineering, Xi'an Technological University, Xi'an, Shaanxi 710021, China
  • 3School of Mechatronic Engineering, Xi'an Technological University, Xi'an, Shaanxi 710021, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (16)
    Equations (0)
    References (26)
    Cited By (1)
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    Paper Information
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    Figures & Tables(16)
    Diagram of calibration device

    Fig. 1. Diagram of calibration device

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    Flow chart of the proposed algorithm

    Fig. 2. Flow chart of the proposed algorithm

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    Visualization process of the proposed algorithm

    Fig. 3. Visualization process of the proposed algorithm

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    Schematic of contour mask area positioning

    Fig. 4. Schematic of contour mask area positioning

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    Threshold segmentation results of the different methods

    Fig. 5. Threshold segmentation results of the different methods

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    Long line fitting results

    Fig. 6. Long line fitting results

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    LSD local short line calibration and positioning results

    Fig. 7. LSD local short line calibration and positioning results

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    Local short line calibration and positioning model

    Fig. 8. Local short line calibration and positioning model

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    Calibration error curve of coordinate X

    Fig. 9. Calibration error curve of coordinate X

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    Calibration error curve of coordinate Y

    Fig. 10. Calibration error curve of coordinate Y

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    • Table 1. Related parameters of calibration device

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      Table 1. Related parameters of calibration device

      DeviceParameterContent
      Resolution4×103 dpi/8×106 pixel
      Horizontal viewing angle /(°)63
      CameraPixel size /μm1.4
      Pixel3264×2448
      Focal length /mm3.6
      Cross line width /μm22
      ReticleDiameter /mm14
      Thickness /mm2.38
      Divider in the sight, a lattice is a mil and a mil is 1/6000 degrees
      Magnification /times3.7
      Gun sightField of view10°25′
      Exit pupil diameter /mm4
      Exit pupil distance /mm20
      Camera and gun sight height /cm15
      Calibration parameterReticle height /cm15
      Calibration distance /cm20
      TargetDemarcate the relationship between pixels and mil

    • Table 2. Time consuming test of threshold segmentationunit: s

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      Table 2. Time consuming test of threshold segmentationunit: s

      Serial No.OTSUISTWallnerBradleyProposed method
      10.6240.6520.6090.8121.802
      20.6430.6400.6570.8241.887
      30.6470.6300.6680.8081.854

    • Table 3. Quantitative analysis of long line fitting

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      Table 3. Quantitative analysis of long line fitting

      IDNXRXNYRY
      1300.98581416-0.987986
      2260.99977014-0.999841
      326-0.998681140.998974
      416-0.998672220.998774
      5160.99795610-0.997369
      6320.99298330-0.980534
      Mean value0.9956460.993913

    • Table 4. Quantitative analysis of calibration error

      View table

      Table 4. Quantitative analysis of calibration error

      ID123456
      Pa1714.40,1177.671705.53,1180.111712.92,1175.761713.55,1175.21712.31,1178.901709.04,1177.56
      Pb1713.55,1177.651705.50,1180.111711.90,1175.801712.92,1175.231713.02,1178.931709.73,1177.57
      Pc1712.55,1177.631705.85,1180.161713.25,1175.741713.32,1175.211711.99,1178.891710.03,1177.58
      Pd1714.10,1177.661704.30.1179.931711.74,1175.811713.48,1175.211712.38,1178.911708.05,1177.57
      Pcross1711.95,1177.621704.30,1179.931712.20,1175.591712.73,1175.241710.73,1178.851707.91,1177.53
      Ea0.1434,0.00420.0721,0.01500.0424,-0.00290.0477,-0.00320.0921,0.00480.0663,0.0019
      Eb0.0934,0.00270.0701,0.0146-0.0175,0.00120.0111,-0.00080.1335,0.00700.1067,0.0031
      Ec0.0350,0.00100.0909,0.01900.0614,-0.00410.0343,-0.00230.0737,0.00390.1239,0.0036
      Ed0.1260,0.00370.0000,0.0000-0.0269,0.00180.0438,-0.00300.0962,0.00500.0082,0.0025

    • Table 5. Quantitative analysis of calibration coefficient

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      Table 5. Quantitative analysis of calibration coefficient

      IDPixel /mil
      151.18125
      250.15126
      351.08740
      450.11254
      550.04953
      651.28648
      Mean value50.644743

    • Table 6. Quantitative analysis of calibration

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      Table 6. Quantitative analysis of calibration

      Rotationangle /milTest 1Test 2Test 3
      X positionin imageCalibrationangle /milX positionin imageCalibrationangle /milX positionin imageCalibrationangle /mil
      41509.494.009701509.543.990151509.084.00417
      31560.083.010781561.432.965561560.192.99498
      21610.422.016791611.781.971381610.362.00435
      11663.040.977791662.020.979371664.480.93583
      01712.5601711.6201711.870
      -11765.171.038801762.451.003661765.561.06013
      -21814.672.016201815.192.045031814.742.03121
      -31867.013.049671868.473.097061867.903.08087
      -41919.324.082561918.034.075651920.154.11257
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    Xin Yue, Liangliang Li, Hongjun Wang, Zhigang Lü, Bingcai Liu. Gun Image Stabilization Calibration Method Based on Fitting Calibration Model[J]. Acta Optica Sinica, 2021, 41(15): 1510001

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    Paper Information

    Category: Image Processing

    Received: Nov. 5, 2020

    Accepted: Mar. 9, 2021

    Published Online: Aug. 31, 2021

    The Author Email: Wang Hongjun (whj0253@sina.com)

    DOI:10.3788/AOS202141.1510001

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology