基于分类补偿的遥感影像阴影去除算法分析-(5665)

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1、万方数据西南交通大学硕士研究生学位论文第1I页AbstractWiththerapiddevelopmentofscienceandtechnology，satelliteremotesensingusheredinanunprecedentednewstage．Remotesensingtechnologyhavebeenappliedinmoreandmorefieldsduetocannotbematchedbyothertechnology．However,Intheremotesensingimage．b

2、ecausetherearealotoftallbuildingsandtreeswillblocktheSun’Srays，leadtoformtheshadowontheground．Theexistenceoftheshadownotonlyhasabeneficialeffectbutalsohasabadinfluenceontheapplicationofremotesensingimage．WeCanthroughtheshadow’ssize，shapeanddirectiontoestimatet

3、hesizeoftheobstructions’shapeandthedirectionofthelightsource．etc．But，thereductionorevenlossofinformationintheshadowregionscausesproblemssomeapplocationsinthefieldofcomputer,suchasobjectrecognition，imagesegmentation，imageregistrationandSOon．Therefore，recoveryth

4、ecolorandtexturesinformationofshadowregiontoreduceoreveneliminatetheadverseeffectwhichwillmaketheremotesensingimagedatacouldbefullyandproperlyused．Recoveringtheinformationofshadowregioncontainsshadowdetectionandshadowremoval．Inthispaper，wewillresearchontheshad

5、owremoval．Thispaperdescribestheprincipleandtheexperimentalsimulationanalysisofexistillgshadowremovalalgorithm，inviewoftheshadowremovalmethodbasedonnonlocalregularizationstillexistcolorinformationCan’trecoveryenoughgood，ashadowremovalmethodbasedonnonlocalregula

6、rizationofbrightdarkcompensationwasproposed．Firstly，themethoddividetheshadowandthecorrespondingsimilarunshadedregionintobrightareaanddarkare色throughexecutingclassifycompensationrespectivelytogetapredictedimagewhichc觚maintaincolorinformationbetter．Andthen，Weana

7、lyzethedifferenceofshadowsealeintheR,G，Bthreechanneldimensionofdifferentgroundinshadowregion，thereforeputforwardtheR,G，Bthreechanneldimensionsshouldbeallocatedweightvaluerespectivelvoftheshadowscalenonlocalregularizationtoreducethecolordistortionwhileenhanceth

8、edetailinf-ornlation．TheexperimentalresultsshowthattheimprovedmethodCanbetterrestorecolorinfo咖ationofshadowregion．Inviewofthemethodbasedonnonlocalregularizationofbrightdarkcompensa