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Laser & Optoelectronics Progress, Volume. 55, Issue 3, 030102(2018)

Design of Background Light Elimination for Visibility Instrument

Qinzheng Hao1,2, Ling Yang1,2, Xiaoqiong Zhen1、*, and Hanming Liu1
Author Affiliations
  • 1 College of Electronic Engineering, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China
  • 1 School of Mathematics and Computer Science, Gannan Normal University, Ganzhou, Jiangxi 341000, China
  • 2 CMA Key Laboratory of Atmospheric Sounding, Chengdu, Sichuan 610225, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
    Equations (0)
    References (18)
    Cited By (2)
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    Figures & Tables(13)
    Schematic of homologous dual-optical-path visibility instrument

    Fig. 1. Schematic of homologous dual-optical-path visibility instrument

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    Schematic of modulation system

    Fig. 2. Schematic of modulation system

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    Schematic of modulation hardware

    Fig. 3. Schematic of modulation hardware

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    Gray value-power calibration curve

    Fig. 4. Gray value-power calibration curve

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    Flow chart of denoising visibility inversion

    Fig. 5. Flow chart of denoising visibility inversion

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    Imaging result of rated power

    Fig. 6. Imaging result of rated power

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    Imaging result after eliminating background (32 modulation points)

    Fig. 7. Imaging result after eliminating background (32 modulation points)

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    High visibility contrast chart in daytime

    Fig. 8. High visibility contrast chart in daytime

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    High visibility contrast chart in nighttime

    Fig. 9. High visibility contrast chart in nighttime

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    Low and medium visibility contrast chart in daytime

    Fig. 10. Low and medium visibility contrast chart in daytime

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    Low and medium visibility contrast chart in nighttime

    Fig. 11. Low and medium visibility contrast chart in nighttime

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    • Table 1. Results of quality assessment

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      Table 1. Results of quality assessment

      Modulation methodRPSNR /dBEMSE /m
      Day timeNight timeDay timeNight time
      Sine wave with 16 points34.070635.497125.469318.3389
      Sine wave with 32 points35.329336.151619.061415.7732
      Sine wave with 64 points37.111638.438612.64519.3159
      Sine wave with 128 points39.667939.59607.01937.1364

    • Table 2. Comparison between homologous double light path and LT31 data

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      Table 2. Comparison between homologous double light path and LT31 data

      Modulation methodERMS /mR
      Day timeNight timeDay timeNight time
      Raw (not modulated)5860.91912.70.360.71
      Sine wave with 16 points978.6802.10.880.85
      Sine wave with 32 points855.7725.60.890.91
      Sine wave with 64 points835.3692.50.910.95
      Sine wave with 128 points512.4629.70.950.96
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    Qinzheng Hao, Ling Yang, Xiaoqiong Zhen, Hanming Liu. Design of Background Light Elimination for Visibility Instrument[J]. Laser & Optoelectronics Progress, 2018, 55(3): 030102

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    Paper Information

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    Received: Aug. 30, 2017

    Accepted: --

    Published Online: Sep. 10, 2018

    The Author Email: Zhen Xiaoqiong ( zhenxq@cuit.edu.cn)

    DOI:10.3788/LOP55.030102

    Topics

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