Chinese Optics, Volume. 17, Issue 5, 1199(2024)

Cloud interference removal using information entropy-low-pass-filtering combined mask

Jing LI* and Ying LI
Author Affiliations
  • Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
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    Figures & Tables(11)
    Original push-broom maritine remote sensing images
    Images after stripe noise removal by moment matching
    Images after stripe noise removal by improved moment matching
    Informational entropy filtering image
    Indicator map for zero local entropy
    Processed by the proposed algorithms
    Comparison between original images (Part) and corresponding images processed results obtained by four algorithms. From top to bottom are 4 different images, from left to right: original images, and processed by dark channel prior, local histogram equalization, low-frequency diminishing amd proposed algorithm. Yellow Squares are examples of selected areas for evaluations. A,B,D are near cloud areas; C,F,G are non-cloud areas, E,H are thin-cloud areas.
    Local area details comparison
    • Table 1. Comparison of image entropies in local area of images processed by different algorithms

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      Table 1. Comparison of image entropies in local area of images processed by different algorithms

      薄云区近云区非云区平均值
      原图5.2023.1913.3913.928
      基于暗通道先验算法6.2822.8354.2964.471
      局部直方图均衡算法7.3502.9675.0165.111
      低频特征消减算法4.1752.9762.9363.363
      本文算法7.8477.9767.8267.883
    • Table 2. Comparison of image contrasts in local area of images processed by different algorithms

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      Table 2. Comparison of image contrasts in local area of images processed by different algorithms

      薄云区近云区非云区平均值
      原图12.0882.2262.5825.632
      基于暗通道先验算法55.3778.3225.47923.059
      局部直方图均衡算法55.40219.0799.10727.863
      低频特征消减算法104.88166.95454.74475.526
      本文算法60.30672.43858.65663.800
    • Table 3. Comparison of image mean gradients in local area of images processed by different algorithms

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      Table 3. Comparison of image mean gradients in local area of images processed by different algorithms

      薄云区近云区非云区平均值
      原图6.6785.9704.6125.753
      基于暗通道先验算法24.48631.24410.05321.928
      局部直方图均衡算法72.73376.94321.35857.011
      低频特征消减算法94.857269.980189.559184.799
      本文算法74.298315.702259.858216.619
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    Jing LI, Ying LI. Cloud interference removal using information entropy-low-pass-filtering combined mask[J]. Chinese Optics, 2024, 17(5): 1199

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    Paper Information

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    Received: Apr. 10, 2024

    Accepted: --

    Published Online: Dec. 31, 2024

    The Author Email:

    DOI:10.37188/CO.2024-0067

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