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《基于特征提取的sar圖像去斑方法》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、AbstractAbstractSyntheticapertureradar(SAR)isakindofhighresolutionimagingradar.Ithastheabilityoftakingimagesundernearlyallweatherconditionsandimaginganytargetontheearth,soithasbeenwidelyappliedtomilitaryreconnaissancefieldsandnationaleconomicfields.Inrecentyears，withtherapiddeve
2、lopmentofSARsatelliteastronomytechnique，SARimageprocessingisbecomingmoreandmoreimportant．Unfortunately,SARimagesaremuchdegradedbyspecklebecauseofthecoherentimagingsystem.Speckleaffectsobjectdetectionandidentification.Therefore,itisofgrestimportancetosuppressthespeckleinSARimages
3、.Thereisadilemmacontradictionsbetweenedgeinformationandnoisesuppressionprotectioninthetraditionalmethodofimagedenoising.ThisthesisisfocusedontheSARimagedespecklingbasedontargetsextraction.(1)ThisthesispresentsaSARimagespecklefilteringcombiningtargetextractionwithSRADalgorithm.Th
4、emethodfirstdetecttargets,suchasisolatedpoints,linesandtexturefeatures,bybilateralfilteringandCannyedgedetectionoperator,andthenextractandremovethemfromtheSARimage.ThenimplySRADfileringwiththeoptimumnumberofiterationstothetargets-removedimage.Thismethodcanremovethemostspecklenoi
5、seinimagesandretainasmuchaspossibleofthedetailsoftheimageatthesametime.(2)ThisthesisfirstanalysistheBM3Dalgorithm,andthenproposedaSARimagespecklefilteringcombiningtargetextractionwithBM3Dalgorithm.ThealgorithmfirstextractsthetargetimagesandremovethemfromtheSARimage.ThenapplyBM3D
6、filteringtothetargets-removedimage.ThismethodintroducestheBM3Dalgorithmwhichisamoreeffectivedenoisingmethod.TosolvetheproblemoftheSRADalgorithm,whichistoosimpletoachievethebestdespeckledresults.Theexperimentsshowthatthemethodcandespecklefullyandpreservepointtargets，edgesandtextu
7、rewell．(3)ThisthesisproposedaSARimagedespecklingmethodbasedontheK-meansclusteringandPPBalgorithm.ThemethodextractthedetailtargetsoftheimageusingK-meansclustering.Thendespecklethetargets-removedimageusingPPBalgorithm.Thismethodcanpreserveisolatedpointtargetsbetterthanothermethods
8、.Keyword:Syntheticapertureradarspecklenoisefeat
