基于生物光学模型的水面薄油膜厚度的高光谱遥感反演实验研究  

Experimental Study of Offshore Oil Thickness Hyperspectral Inversion Based on Bio-Optical Model

作　　者：肖剑伟[1] 田庆久[1] 

机构地区：[1]南京大学国际地球系统科学研究所,江苏南京210093

出　　处：《光谱学与光谱分析》2012年第1期183-187,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40971186);(973)前期研究专项课题(2010CB434801);中央高校基本科研业务费专项资金(1092021413)资助

摘　　要：研究水表薄油膜厚度与其反射率光谱之间的变化规律,对于分析海洋油膜污染和油气勘探的遥感探测机理具有十分重要的意义。建立了水面薄油膜厚度的生物光学模型,并介绍了单波段和双波段比值简化算法反演薄油膜厚度信息的方法。通过对原油样品进行油膜厚度定量反演,研究了遥感反射率随水表油膜厚度的变化规律。研究发现,可见光到近红外波段(450～800nm)反射率对油膜厚度变化最为敏感,有很高的负相关关系,并且随着油膜厚度的增加呈负指数形态下降。对于浅水环境较混浊的水体,ETM1/ETM3双波段比值模型可以较好的消除线性天空散射光的影响,克服单波段反演模型在不同水质背景下反演效果不稳定的特点,其反演结果的复相关系数R2可以达到0.98,是水表薄油膜厚度遥感探测的较好波段选择。Study on the regularity of thin oil film thickness and its reflectance plays an important role in understanding the mechanism of offshore oil slick and ocean hydrocarbon resources exploration.In this work,the thin oil film thic kn ess of biological optical model is established,and introduced the simplified m o del of inversion thin oil film thickness information by using one single-band o r by using two-band ratio image data.With the quantitative inversion test of t hi n oil film thickness through the natural shallow water and the crude oil sample, the variation rules of between oil spectral parameters and the thin oil film th ickness are obtained.The study show that,the oil reflectance in visible and ne ar infrared spectrum（450～800 nm） and the thin film thickness has high inverse correlation,and showed as negative exponent form decline with the increase of o il film thickness.Regarding the shallow water environment,the double band ra ti o inversion model of using ETM1/ETM3 band ratio can used to be eliminate the imp act of sky scattering influence,and to overcome the single-band model fault o f Inversion instability when used in different water quality regions,as the inve r sion result of the model＇s correlation coefficient can reach 0.98,which is c o ns idered to be the ideal hydrocarbon content remote sensing surveying band.and c o mbined with other types of remote sensing technology（such as ultraviolet-laser o r SAR）,it would provide more economic and precision services of oil total amou nt infromation for offshore oil exploration and oil spill monitoring.

关 键 词：薄油膜 厚度 高光谱 反射率 生物光学模型 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]