基于新极化特征参数的SAR海洋溢油检测  

New Polarimetric Feature Parameter for Marine Oil Spill Detection in SAR Images

作　　者：任慧敏 宋冬梅[1,3] 王斌 甄宗晋[1,2] 刘斌 张婷 Ren Huimin;Song Dongmei;Wang Bin;Zhen Zongjin;Liu Bin;Zhang Ting(School of Oceanography and Space Informatics,China University of Petroleum,Qingdao 266580,China;College of Graduated,China University of Petroleum,Qingdao 266580,China;The Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China;National Laboratory for Marine Science and Technology,Qingdao 266071,China;The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]中国石油大学(华东)研究生院,山东青岛266580 [3]海洋矿物资源实验室青岛海洋科学技术国家实验室,山东青岛266071 [4]青岛海洋科学技术国家实验室,山东青岛266071 [5]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《遥感技术与应用》2020年第4期934-942,共9页Remote Sensing Technology and Application

基　　金：国家重点研发计划(2017YFC1405600);国家自然基金委-山东省联合基金重点项目(U190621);国家自然科学基金项目(41772350、61371189、41701513、41706208、41576032、61701542)。

摘　　要：为了提升海上油膜与其他目标的可分离程度,提出基于特征值分解的一种新的极化特征G,该特征不仅能够反映集合中不同目标之间的极化状态,还能够描述不同散射类型在统计意义上的不纯度。若某个区域中去极化状态越弱,不纯度越低,则该区域中新极化特征G的值越低。利用两景Radarsat-2全极化SAR(Synthetic Aperture Radar)影像对新特征的有效性进行实验验证。结果表明:海水具有较小的特征值,油膜具有较大的特征值,生物膜的特征值介于两者之间。且与span、-α、P、A、CPD等5种经典的极化特征相比,新特征在图像对比度、局部标准偏差及概率密度曲线等三个指标上均有更好的表现,不仅能区分生物膜(植物油模拟)与原油,且具有更好的抑噪性。In order to improve the separability of oil film and other targets,a new polarization feature G based on eigenvalue and eigenvector decomposition is proposed.The new feature can not only reflect the polarization states between different targets in the corresponding set,but also has the ability to describe the statistical information impurities of the different scattering types.If the depolarization state was weaker,the impurities were smaller,then the value of the new polarimetric feature G in the specific region would be lower.Two sets of Radarsat-2 fully Pol-SAR(Polarimetric Synthetic Aperture Radar)data are used to verify the validity of the new feature G.The results show that there is a small eigenvalue in the seawater,a large eigenvalue in the oil film,the eigenvalue of the biofilm is between the oil film and seawater.In addition,the new feature G have better performance than span,-α,P,A and CPD in the image contrast,local standard deviation and probability density curve,which proves that the new feature G not only can distinguish bio-film(simulated by plant oil)and crude oil,but also has a good noise suppression ability.

关 键 词：Radarsat-2 SAR 极化特征 特征值分解 不纯度 溢油检测 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]