Remote detection of marine debris using Sentinel-2 imagery: A cautious note on spectral interpretations

被引：21
作者：
Hu C. [1 ]
机构：
[1] University of South Florida, 140 Seventh Avenue, South, St. Petersburg, 33701, FL
来源：
Marine Pollution Bulletin | 2022年 / 183卷
基金：
美国海洋和大气管理局; 美国国家航空航天局;
关键词：
Floating matters; Marine litter; MSI; OLCI; Pixel unmixing; Plastics; Remote sensing; Sentinel-2; Spectroscopy;
D O I：
10.1016/j.marpolbul.2022.114082
中图分类号：
学科分类号：
摘要：
Remote detection of marine debris (also called marine litter) has received increased attention in the past decade, with the Multispectral Instruments (MSI) onboard the Sentinel-2A and Sentinel-2B satellites being the most used sensors. However, because of their mixed band resolutions and small sub-pixel coverage of debris within a pixel (e.g., <10 %), caution is required when interpreting the spectral shapes of MSI pixels. Otherwise, the spectrally distorted shapes may be misused as spectral endmembers (signatures) or interpreted as from certain types of floating matters. Here, using simulations and MSI data, I show the origin of the spectral distortions and emphasize why both pixel averaging and pixel subtraction are critical in algorithm design and spectral interpretation for the purpose of remote detection of marine debris using Sentinel-2 MSI sensors. © 2022 Elsevier Ltd
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