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ID:36541915
大小:4.58 MB
页数:7页
时间:2019-05-11
《极化SAR自适应三分量分解方法_蔡永俊》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第45卷第9期测绘学报Vol.45,No.92016年9月ActaGeodaeticaetCartographicaSinicaSeptember,2016引文格式:蔡永俊,张祥坤,姜景山.极化SAR自适应三分量分解方法[J].测绘学报,2016,45(9):1089-1095.DOI:10.11947/j.AGCS.2016.20150533.CAIYongjun,ZHANGXiangkun,JIANGJingshan.AdaptiveThree-componentDecompositionApproachforPolarimetricSARData[J].A
2、ctaGeodaeticaetCartographicaSinica,2016,45(9):1089-1095.DOI:10.11947/j.AGCS.2016.20150533.极化SAR自适应三分量分解方法1,211蔡永俊,张祥坤,姜景山1.中国科学院国家空间科学中心,北京100190;2.中国科学院大学,北京100049AdaptiveThree-componentDecompositionApproachforPolarimetricSARData1,211CAIYongjun,ZHANGXiangkun,JIANGJingshan1.NationalS
3、paceScienceCenter,ChineseAcademyofSciences,Beijing100190,China;2.UniversityofChineseAcademyofSciences,Beijing100049,ChinaAbstract:Inthispaper,theproblemssuchasnegativepowerandscatteringmechanismambiguityinoriginalpolarimetricSARthree-componentdecompositionareintroduced,andtheremainin
4、gflawsinitsimprovedapproachesareindepthanalyzed.Basedonthese,anadaptivethree-componentdecompositionisproposed,andmoregeneralizedscatteringmodelsareused.Becauseinonepixeltheremayexisttwooddordoublebouncescatteringtargetswithdifferentorientationangels,theproposedmethodfirstlyconsiderst
5、hissituation,sothatthesurfaceanddoublebouncescatteringcanbepreservedmoresufficiently.Andthenthealphaparameterisusedtoidentifythedominantscatteringexceptforthevolumescattering.Lastly,anoptimizationmeasuretothepixelswithnegativepowerisproposed,whichsignificantlydecreasesthenegativepowe
6、rpixelscount,sothedecompositionwillbemoreaccurateandmorevalid.Theresultsshowgreatimprovementsinrealscatteringcharacteristicsextractionandtheflawsinmodelbaseddecompositionapproachescanbebetterresolved.Keywords:polarimetricsyntheticapertureradar;polarimetricdecomposition;model-based;ge
7、neralizedscatteringmechanism;adaptiveFoundationsupport:MajorNationalScienceandTechnologyInfrastructureConstructionProject(No.10FG001A)摘要:介绍了原始极化SAR三分量分解中存在的问题,如负功率和散射机制模糊,并深入分析了其改进方法中仍然存在的缺陷,提出了一种自适应的三分量分解。该分解采用了更一般化的散射模型,并首次考虑了像素中存在不同旋转角的两个面或偶次散射目标,然后利用散射Alpha角确定除体散射之外的剩余主导散射机制,使面或偶
8、次散射得到了更充分的保持
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