摘要
为了更加准确地表征粗糙水面环境下溢油的偏振反射特性,建立了改进型溢油偏振二向反射分布函数(pBRDF)模型。该模型基于Priest-Germer (P-G)理论,引入遮蔽函数、漫反射和体散射分量,并结合水面微小平面的概率分布函数,更加适合检测粗糙水面背景的溢油偏振反射特性。在粗糙水面环境下对5种不同溢油(机油、原油、柴油、煤油、汽油)目标进行多角度可见光波段偏振特性测试实验。结果表明:若相对方位角为180°,线偏振度随观测天顶角的增大先增大后减小,随入射天顶角的增大也先增大后减小;线偏振度随相对方位角的增大先增大后减小,在相对方位角为180°时达到最大,且受波长影响较小。该模型的置信精度可达到80%以上,证明了该模型的准确性,为研究粗糙海面溢油的偏振特性提供了一种新的途径。
Objective Oil spill pollution has caused great harm to the marine environment and human society.Accurate identification of marine oil spills can help formulate oil spill treatment strategies and assess disaster losses.Optical characteristics,essential characteristics of marine targets,can reflect the physical and chemical properties,geometric surface,and other characteristic information of marine targets from the aspects of wavelength(frequency),energy,phase angle,polarization state,scattering or radiation characteristics,etc.In addition to the intensity,spectrum,and multi-angle detection methods,there is also polarization information in the reflected radiation of the detected target.When the light wave interacts with the surface of seawater,oil film,and other media,the polarization characteristics of the reflected light wave will change.Polarization detection has fogged permeability to a certain extent,which can weaken the influence of sea fog,significantly improve the contrast between target and background,and weaken or even eliminate the influence of solar flares.However,research on the polarization detection mechanism and the modeling of marine oil spills is still insufficient,which restricts the understanding of polarization characteristics and affects practical applications.Therefore,it is necessary to study the polarization detection mechanism of marine oil spills and build a theoretical model to improve the marine detection ability.Methods On the basis of the Priest and Germer(P-G)theory,this study comprehensively considers specular reflection,diffuse reflection,and volume scattering,optimizes the traditional model for oil spills on the sea surface,and proposes a polarized bidirectional reflection distribution function(pBRDF)model for oil spills on the sea surface that includes the scattering part.Then,it tests the polarization characteristics of five different oil spill targets(i.e.,engine oil,crude oil,diesel oil,kerosene,and gasoline)in the rough water surface environment.By the comparison of the exper
作者
张伟
战俊彤
张肃
付强
李英超
段锦
包世成
姜会林
Zhang Wei;Zhan Juntong;Zhang Su;Fu Qiang;Li Yingchao;Duan Jin;Bao Shicheng;Jiang Huilin(National and Local Joint Engineering Research Center for Space Optoelectronics Technology,Jilin Key Laboratory of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China;School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;School of Electronics and Information Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2023年第6期131-143,共13页
Acta Optica Sinica
基金
国家自然科学基金(62127813,61890963)
吉林省教育厅项目(JJKH20220737KJ,JJKH20220738KJ)
吉林省科技厅项目(20210201093GX,20200201261JC)。
关键词
海洋光学
偏振特性
偏振二向反射分布函数
P-G模型
可见光
溢油目标
oceanic optics
polarization characteristics
polarized bidirectional reflectance distribution function
P-G model
visible light
oil spill target
