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基于光谱分层的浅海水深遥感反演方法

楚森森 程亮 程俭 张雪东 刘晋铭

楚森森,程亮,程俭,等. 基于光谱分层的浅海水深遥感反演方法[J]. 海洋学报,2023,45(1):125–137 doi: 10.12284/hyxb2023024
引用本文: 楚森森,程亮,程俭,等. 基于光谱分层的浅海水深遥感反演方法[J]. 海洋学报,2023,45(1):125–137 doi: 10.12284/hyxb2023024
Chu Sensen,Cheng Liang,Cheng Jian, et al. Shallow water bathymetry using remote sensing based on spectral stratification[J]. Haiyang Xuebao,2023, 45(1):125–137 doi: 10.12284/hyxb2023024
Citation: Chu Sensen,Cheng Liang,Cheng Jian, et al. Shallow water bathymetry using remote sensing based on spectral stratification[J]. Haiyang Xuebao,2023, 45(1):125–137 doi: 10.12284/hyxb2023024

基于光谱分层的浅海水深遥感反演方法

doi: 10.12284/hyxb2023024
基金项目: 国家自然科学基金(42001401);中国博士后科学基金(2020M671431);中央高校基本科研业务费(0209-14380096)。
详细信息
    作者简介:

    楚森森(1989-),男,河南省安阳市人,博士,主要从事浅海地形卫星遥感研究。E-mail: chusensen@163.com

    通讯作者:

    程亮(1978-),男,博士,教授,博士生导师,主要从事海洋遥感与目标识别研究。E-mail: lcheng@nju.edu.cn

    刘晋铭(1991-),男,博士,主要从事浅海地形应用研究。E-mail: Liujm1025@outlook.com

  • 中图分类号: P407.8;TP79

Shallow water bathymetry using remote sensing based on spectral stratification

  • 摘要: 卫星水深反演是水深测量的一种重要手段,其中Stumpf比值算法和Lyzenga多项式算法应用广泛并诞生了大量改进算法,但这些算法没有顾及不同光谱的测深极限与适用范围,为此本文提出一种基于光谱分层的水深反演方法。首先,根据红、绿、蓝光谱对水体的穿透能力差异,提出一种基于影像本身的无参数光谱分层策略,提取红光层、绿光层、蓝光层;然后,根据不同光谱层的波段测深性能,分光谱层构建水深反演优化模型,获取浅海水深反演结果。以我国南沙海域长线礁和美属维尔京群岛巴克岛为实验区,本文方法对经典Stumpf比值算法和Lyzenga多项式算法进行改进后,水深均方根误差、平均绝对误差、平均相对误差分别降低了0.41~0.89 m、0.35~0.65 m、4%~19%,尤其在红光层,即水深较浅区域,平均相对误差降低了58%~149%,精度提升明显。因此,改进算法在提高卫星水深反演效果方面具有可行性和有效性。
  • 图  1  实验区与水深数据

    a. 长线礁遥感影像和声呐测深数据;b. 巴克岛遥感影像;c. 巴克岛激光测深数据;d. 巴克岛水下地形图;左下方世界地图从自然资源部标准地图服务网站下载,审图号为GS(2016)2957号

    Fig.  1  Study areas and depth data

    a. Remote sensing imagery and sonar bathymetric data for the Changxian Reef; b. remote sensing imagery for the Buck Island Reef; c. airborne laser bathymetric data for the Buck Island Reef; d. underwater topographic map of Buck Island Reef; the world map at bottom left was downloaded from the standard map service website of the Ministry of Natural Resources, the drawing review number is GS (2016) 2957

    图  2  反射率与水深散点图

    Fig.  2  Scatter plot of reflection values versus depth values

    图  3  光谱分层示例图

    Fig.  3  Spectral stratification example diagram

    图  4  长线礁水深反演结果图

    a. Stumpf比值算法结果;b. 基于光谱分层的Stumpf比值算法结果;c. Lyzenga多项式算法结果;d. 基于光谱分层的Lyzenga多项式算法结果

    Fig.  4  Bathymetric maps of the Changxian Reef produced by inversion

    a. Result of Stumpf ratio method; b. result of Stumpf ratio method based on spectral stratification; c. result of Lyzenga polynomial method; d. result of Lyzenga polynomial method based on spectral stratification

    图  5  长线礁反演水深与实测水深值误差分布

    正值表示反演水深值比实测水深值深

    Fig.  5  Distribution of differences obtained by subtracting the measured values from the inversion water depth for the Changxian Reef

    Positive value indicates that the inversion water depth is deeper than that of the measured values

    图  6  巴克岛水深反演结果图

    a. Stumpf比值算法结果;b. 基于光谱分层的Stumpf比值算法结果;c. Lyzenga多项式算法结果;d. 基于光谱分层的Lyzenga多项式算法结果

    Fig.  6  Bathymetric maps of the Buck Island Reef produced by inversion

    a. Result of Stumpf ratio method; b. result of Stumpf ratio method based on spectral stratification; c. result of Lyzenga polynomial method; d. result of Lyzenga polynomial method based on spectral stratification

    图  7  巴克岛反演水深与实测水深值误差分布图

    正值表示反演水深值比实测水深值深

    Fig.  7  Distribution of differences obtained by subtracting the measured values from the inversion water depth for the Buck Island Reef

    Positive value indicates that the inversion water depth is deeper than that of the measured values

    图  8  长线礁实验区训练样本数量对反演精度的影响

    Fig.  8  Effects of the number of training samples on the accuracy of bathymetric inversion for the Changxian Reef experimental area

    图  9  巴克岛实验区训练样本数量对反演精度的影响

    Fig.  9  Effects of the number of training samples on the accuracy of bathymetric inversion the Buck Island Reef experimental area

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出版历程
  • 收稿日期:  2022-05-04
  • 修回日期:  2022-09-07
  • 网络出版日期:  2022-09-22
  • 刊出日期:  2023-01-09

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