ROBUST IMAGE REGISTRATION USING LOG-POLAR TRANSFORM

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1、ROBUSTIMAGEREGISTRATIONUSINGLOG-POLARTRANSFORMGeorgeWolbergSiavashZokaiDepartmentofComputerScienceCityCollegeofNewYorkNewYork,NY10031{wolberglzokai}@cs-mail.engr.ccny.cuny.eduABSTRACTTheprimarydrawbackoftheoptimization-basedap-Thispaperdescribesahierarchicalimageregist

2、rationalgo-proachisthatitmayfailunlessthetwoimagesaremis-rithmforaffinemotionrecovery.Thealgorithmestimatesalignedbyamoderatedifferenceinscale,rotation,andtheaffinetransformationparametersnecessarytoregistertranslation.Inordertoaddressthisproblem,weintro-anytwodigitali

3、magesmisalignedduetorotation,scale,ducealog-polarregistrationmoduletobringtheimagesshear,andtranslation.Theparametersarecomputedit-intoapproximatealignment,eveninthepresenceofarbi-erativelyinacoarse-to-finehierarchicalframeworkusingatraryrotationanglesandawiderangeofsc

4、alechanges.ItsvariationoftheLevenberg-Marquadtnonlinearleastsquarespurposeistofurnishagoodinitialestimatetotheaffineoptimizationmethod.Thisapproachyieldsarobustsolu-registrationmodulethatisbasedonnonlinearleastsquarestionthatpreciselyregistersimageswithsubpixelaccuracy

5、.optimization.Alog-polarregistrationmoduleisintroducedtoaccom-Thishyridapproachyieldssuperiorresultsovereithermodatearbitraryrotationanglesandawiderangeofscalemoduleactingindependently.Wedemonstratethealgo-changes.Thisservestofurnishagoodinitialestimateforrithmbyrecove

6、ringtheaffineparametersforpairsofdigitaltheoptimization-basedaffineregistrationstage.Wedemon-imagessubjectedtolargeaffinemotion.stratethehybridalgorithmonpairsofdigitalimagessub-jectedtolargeaffinemotion.2.PREVIOUSWORKThispaperaddressesimageregistrationunderaffine1.INT

7、RODUCTIONtransformations.RecentworkinthisareahasfocusedonImageregistrationreferstothegeometricalignmentofasolutionsinthefrequencydomain.Registrationproblemssetofimages.Thesetmayconsistoftwoormoredigitalim-.involvingpuretranslationcanberecoveredbyapplyingagestakenofasin

8、glesceneatdifferenttimes,fromdifferenttheFouriertransformandusingphasecorrelation[2].Asensors,orfromdifferentviewpoin