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Laser & Optoelectronics Progress, Volume. 58, Issue 24, 2401002(2021)

Water Surface Sun Glint Suppression Method Based on Polarization Filtering and Polynomial Fitting

Meimei Yang1, Peiyao Zhao2, Bin Feng3, and Feng Zhao1、*
Author Affiliations
  • 1School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an, Shaanxi 710121, China
  • 2School of Telecommunications Engineering, Xidian University, Xi'an, Shaanxi 710126, China
  • 3School of Automation, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (19)
    Cited By (5)
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    Figures & Tables(11)
    Reflectivity of sunlight from the air to the smooth water surface

    Fig. 1. Reflectivity of sunlight from the air to the smooth water surface

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    Polarization degree of glint varying with the incident angle of sunlight

    Fig. 2. Polarization degree of glint varying with the incident angle of sunlight

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    Model for water surface sun glint suppression utilizing polarization filtering and polynomial fitting

    Fig. 3. Model for water surface sun glint suppression utilizing polarization filtering and polynomial fitting

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    Flow chart of two-dimensional surface fitting to suppress the sun glint on the water surface

    Fig. 4. Flow chart of two-dimensional surface fitting to suppress the sun glint on the water surface

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    Flow chart of line-by-line polynomial fitting to remove the sun glint

    Fig. 5. Flow chart of line-by-line polynomial fitting to remove the sun glint

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    Experimental results of the first group. (a) Gray image without polarization filtering; (b) gray image with polarization filtering; (c) image obtained by polynomial row direction curve fitting; (d) image obtained by polynomial column direction curve fitting; (e) image obtained by polynomial surface fitting; (f) image of line-by-line polynomial fitting to remove glint

    Fig. 6. Experimental results of the first group. (a) Gray image without polarization filtering; (b) gray image with polarization filtering; (c) image obtained by polynomial row direction curve fitting; (d) image obtained by polynomial column direction curve fitting; (e) image obtained by polynomial surface fitting; (f) image of line-by-line polynomial fitting to remove glint

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    Histograms of experimental results of the first group. (a) Image histogram without polarization filtering; (b) image histogram with polarization filtering; (c) image histogram of polynomial row direction curve fitting image; (d) image histogram of polynomial column direction curve fitting; (e) image histogram of polynomial surface fitting; (f) image histogram of line-by-line polynomial fitting

    Fig. 7. Histograms of experimental results of the first group. (a) Image histogram without polarization filtering; (b) image histogram with polarization filtering; (c) image histogram of polynomial row direction curve fitting image; (d) image histogram of polynomial column direction curve fitting; (e) image histogram of polynomial surface fitting; (f) image histogram of line-by-line polynomial fitting

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    Experimental results of the second group. (a) Gray image without polarization filtering; (b) gray image with polarization filtering; (c) image obtained by polynomial row direction curve fitting; (d) image obtained by polynomial column direction curve fitting; (e) image obtained by polynomial surface fitting; (f) image of line-by-line polynomial fitting to remove glint

    Fig. 8. Experimental results of the second group. (a) Gray image without polarization filtering; (b) gray image with polarization filtering; (c) image obtained by polynomial row direction curve fitting; (d) image obtained by polynomial column direction curve fitting; (e) image obtained by polynomial surface fitting; (f) image of line-by-line polynomial fitting to remove glint

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    Histograms of experimental results of the second group. (a) Image histogram without polarization filtering; (b) image histogram with polarization filtering; (c) image histogram of polynomial row direction curve fitting image; (d) image histogram of polynomial column direction curve fitting; (e) image histogram of polynomial surface fitting; (f) image histogram of line-by-line polynomial fitting

    Fig. 9. Histograms of experimental results of the second group. (a) Image histogram without polarization filtering; (b) image histogram with polarization filtering; (c) image histogram of polynomial row direction curve fitting image; (d) image histogram of polynomial column direction curve fitting; (e) image histogram of polynomial surface fitting; (f) image histogram of line-by-line polynomial fitting

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    • Table 1. Image quality evaluation indexes of the first group of experiments

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      Table 1. Image quality evaluation indexes of the first group of experiments

      ImageMean grayStandard deviationNumber of saturated pixels
      Fig. 7(a)137.455639.272627537
      Fig. 7(b)119.717325.39337037
      Fig. 7(c)115.909116.13040
      Fig. 7(d)115.712115.55160
      Fig. 7(e)115.626815.54400
      Fig. 7(f)114.313215.36910

    • Table 2. Image quality evaluation indexes of the second group of experiments

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      Table 2. Image quality evaluation indexes of the second group of experiments

      ImageMean grayStandard deviationNumber of saturated pixels
      Fig. 9(a)141.453738.712357140
      Fig. 9(b)110.526828.876211289
      Fig. 9(c)108.202024.15760
      Fig. 9(d)103.412719.89260
      Fig. 9(e)98.174717.12000
      Fig. 9(f)96.223016.75010
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    Meimei Yang, Peiyao Zhao, Bin Feng, Feng Zhao. Water Surface Sun Glint Suppression Method Based on Polarization Filtering and Polynomial Fitting[J]. Laser & Optoelectronics Progress, 2021, 58(24): 2401002

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    Paper Information

    Category: Atmospheric Optics and Oceanic Optics

    Received: Dec. 4, 2020

    Accepted: Feb. 26, 2021

    Published Online: Nov. 24, 2021

    The Author Email: Feng Zhao (hfengzhao@xupt.edu.cn)

    DOI:10.3788/LOP202158.2401002

    Topics

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