基于多指标的海面溢油范围在轨提取方法研究  

Study on the On-Orbit Extraction Method of Sea Oil Spill Coverage Based on Multiple Indexes

作　　者：董书莉[1] 袁立男 贺强民[1] 武文波[1] 李阳 张斐然[1] DONG Shuli;YUAN Linan;HE Qiangmin;WU Wenbo;LI Yang;ZHANG Feiran(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2023年第4期103-112,共10页Spacecraft Recovery & Remote Sensing

基　　金：科技部课题(2022YFF0708004)。

摘　　要：随着海洋石油勘探开发和海洋运输活动日益频繁,海洋溢油污染已成为海洋环境的最主要威胁之一。现有的海面溢油遥感监测均基于下传到地面的遥感数据进行,很少做到在轨实时监测溢油事故的发生以及变化,由于卫星下传数据带宽有限,而遥感监测具有高时效性要求,迫切需要提高星载在轨数据处理能力,实现溢油监测。文章采用Landsat数据建立一种基于多指标的海面溢油范围提取方法,分为溢油光谱分析、基于自适应参数的溢油提取指标构建、基于归一化植被指数的溢油提取指标构建和单一指标提取结果的加权融合四部分,最终获取海面溢油范围提取结果。通过对比不同方法下海面溢油的提取结果,文章提出的海面溢油提取方法可以快速去除陆表、云区和无油海面的影响,较准确地提取出溢油区域。该算法复杂度较低、运算过程无需占用大量的存储资源,因此适用于在轨应用。With the increasing frequency of offshore oil exploration and development and marine transportation activities,the sea oil spill pollution has become one of the most important threats to marine environment.The existing remote sensing monitoring of sea oil spill is mostly based on remote sensing data downloaded to ground,but it is seldom able to monitor the occurrence and change of oil spill on orbit.Due to the limited broadband of satellite down-transmission data and high timeliness need of remote sensing monitoring,it is urgent to improve the on-orbit data processing capacity to realize on-orbit oil spill monitoring.In this study,an on-orbit extraction method of sea oil spill range based on multiple indexes is developed.The method contains four parts,including oil spill spectral analysis and region clipping,oil spill extraction based on gradient,oil spill extraction based on NDVI,and weighted fusion,and the sea oil spill extraction results show that the method developed in this paper can quickly remove the influence of land surface,clouds area,and oil-free sea surface,and extract the oil spill area more accurately.The algorithm has low complexity and does not require a large amount of storage resources.Therefore,it is suitable for on-orbit applications.

关 键 词：海面溢油 自适应参数 光谱分析 在轨提取 光学遥感 

分 类 号：P71[天文地球—海洋科学]