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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Benthic Habitat Mapping Using Multispectral High-Resolution Imagery: Evaluation of Shallow Water Atmospheric Correction Techniques
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Benthic Habitat Mapping Using Multispectral High-Resolution Imagery: Evaluation of Shallow Water Atmospheric Correction Techniques

机译：利用多光谱高分辨率影像进行的底栖生物栖息地制图：浅水大气校正技术的评估

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摘要

Remote multispectral data can provide valuable information for monitoring coastal water ecosystems. Specifically, high-resolution satellite-based imaging systems, as WorldView-2 (WV-2), can generate information at spatial scales needed to implement conservation actions for protected littoral zones. However, coastal water-leaving radiance arriving at the space-based sensor is often small as compared to reflected radiance. In this work, complex approaches, which usually use an accurate radiative transfer code to correct the atmospheric effects, such as FLAASH, ATCOR and 6S, have been implemented for high-resolution imagery. They have been assessed in real scenarios using field spectroradiometer data. In this context, the three approaches have achieved excellent results and a slightly superior performance of 6S model-based algorithm has been observed. Finally, for the mapping of benthic habitats in shallow-waters marine protected environments, a relevant application of the proposed atmospheric correction combined with an automatic deglinting procedure is presented. This approach is based on the integration of a linear mixing model of benthic classes within the radiative transfer model of the water. The complete methodology has been applied to selected ecosystems in the Canary Islands (Spain) but the obtained results allow the robust mapping of the spatial distribution and density of seagrass in coastal waters and the analysis of multitemporal variations related to the human activity and climate change in littoral zones.
机译：远程多光谱数据可以为监测沿海水域生态系统提供有价值的信息。具体来说，高分辨率的基于卫星的成像系统（如WorldView-2（WV-2））可以在实现对受保护的沿海地区采取保护行动所需的空间尺度上生成信息。但是，与反射辐射相比，到达天基传感器的沿海放水辐射通常较小。在这项工作中，已经为高分辨率图像实现了通常使用准确的辐射传递码来校正大气影响的复杂方法，例如FLAASH，ATCOR和6S。已使用现场光谱辐射仪数据在实际场景中对它们进行了评估。在这种情况下，这三种方法均取得了优异的效果，并且观察到基于6S模型的算法的性能略有优越。最后，为绘制浅水海洋保护环境中的底栖生境，提出了拟议的大气校正与自动脱胶程序相结合的相关应用。这种方法是基于底栖类的线性混合模型在水的辐射传递模型中的集成。完整的方法已应用于加那利群岛（西班牙）的特定生态系统，但获得的结果可对沿海水域海草的空间分布和密度进行可靠的制图，并分析与人类活动和气候变化有关的多时相变化。沿海地带。

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