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水下光场的迭代求解

何大华 李阳阳 周少杰

何大华, 李阳阳, 周少杰. 水下光场的迭代求解[J]. 中国光学(中英文), 2022, 15(2): 297-305. doi: 10.37188/CO.2021-0162
引用本文: 何大华, 李阳阳, 周少杰. 水下光场的迭代求解[J]. 中国光学(中英文), 2022, 15(2): 297-305. doi: 10.37188/CO.2021-0162
HE Da-hua, LI Yang-yang, ZHOU Shao-jie. Iterative solution of underwater scattering light field[J]. Chinese Optics, 2022, 15(2): 297-305. doi: 10.37188/CO.2021-0162
Citation: HE Da-hua, LI Yang-yang, ZHOU Shao-jie. Iterative solution of underwater scattering light field[J]. Chinese Optics, 2022, 15(2): 297-305. doi: 10.37188/CO.2021-0162

水下光场的迭代求解

doi: 10.37188/CO.2021-0162
基金项目: 船舶重工装备预研联合基金(No. 6141B042006)
详细信息
    作者简介:

    何大华(1973—),男,湖北武汉人,博士,高级工程师,1995年于上海交通大学获得学士学位,2000年于华中理工大学获得硕士学位,2005年于华中科技大学获得博士学位,主要从事水下光电成像及图像处理方面的研究。E-mail: 470444534@qq.com

  • 中图分类号: TN29;O435.1;O436.2

Iterative solution of underwater scattering light field

Funds: Sponsored by China Shipbuilding Industry Corporation Joint fund for Equipment Pre-Research(No. 6141B042006)
More Information
  • 摘要: 水体对光线的散射是水下图像质量劣化的重要因素,为了定量分析在特定光源照射下水体散射的影响,建立了光线水下传输的散射模型,以此为基础推导出求解水下光场分布的Fredholm积分方程。在水中光线能量随距离的增大呈指数规律衰减,基于此,在水体体散射函数为常数的情况下,给出了有边界条件时该积分方程的数值迭代求解方法,得到高精度的水下光场分布。以太阳、均匀亮度天空、水下点光源以及空中点光源为例,分别给出了水面平静时的水下光场的计算结果。该求解方法可推广应用于任意光源配置、任意边界条件下的水下光场分布,为严格推导水体点扩展函数及调制传递函数奠定了基础。

     

  • 图 1  水下光场示意图

    Figure 1.  Diagram of the underwater light field

    图 2  太阳照射下的水下光场

    Figure 2.  Underwater light field from the sun

    图 3  水下球面照度形成原理

    Figure 3.  Formation of underwater spherical illuminance

    图 4  水下光场迭代求解流程图

    Figure 4.  Iterative solution flow chart of the underwater light field

    图 5  太阳照射下水下光场迭代曲线

    Figure 5.  Iteration curves of the underwater light field from the sun

    图 6  天空背景在水面形成照度

    Figure 6.  Illuminance on the surface with the sky as the background

    图 7  天空背景照射下水下光场迭代曲线

    Figure 7.  Iteration curves of the underwater light field with the sky as the background

    图 8  水下点光源形成的水下初始光场

    Figure 8.  Underwater initial light field by an underwater point light source

    图 9  水上点光源形成的水下初始光场

    Figure 9.  Underwater initial light field by an overwater point light source

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出版历程
  • 收稿日期:  2021-08-23
  • 修回日期:  2021-09-25
  • 录用日期:  2021-12-20
  • 网络出版日期:  2021-12-24
  • 刊出日期:  2022-03-21

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