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1、HIGHACCURACYREGISTRATIONOFTRANSLATEDANDROTATEDIMAGESUSINGHIERARCHICALMETHODLohKokHeng,ErMengHwaurdHuiSiewKokSchoolofElectricalantlElectronicEngineeringNanyangTechnologicalUniversitySingapore639798p7372788z@ntu.edu.sgABSTRACTInsection2ofthispaper,thehierar
2、chicalregistrationalgorithm,whichinvolvedthephasecorrelationandspectrumcancellationAllcwhierarchicalilnagcrcgistratiorlalgoritl,l,,ispresentedwillbediscussed.Someexperimentalresultsarcprovidedinwhichachievessubpixelaccuracyforirnagcswithbothsection3tocicm
3、onstratetherobustnessandeffectivenessofthistranslationalaridrotationalinovcimxts.Thiswavciiuiiiberalgorithm.Finally,concludingremarksarcmadeinsection4.dornainalgorithiniscflicicntcoinparedtothcconvcntionalripproachesbasecloninterpolationorcorrelatioriinsp
4、atialor2.HIERARCHICALREGISTRATIONfrequencydomain.Inaddition,theproposedapproachisrobustandciiiiachievesubpixelaccuracyr'cgistratioiicvciiwhentheThehicr;whicalregistrationmethodconsistsof2level.Thefirstimagescontainaliasirigcrrorstluctotinders;iinpliirg.Th
5、islevelis;ICOB~SCphasecorrelationregistration,wheretherigidhicrxchicalsearchingmethodwhichinvolvctlcoastariclfinetriinsl;ition;inclsubpixelrotationshiltsarctlcterinincd.ThisissearchfurthereiihnnccstheconvcrgcnttinicofI-egis1ration.Thefollowcclby;inaccurat
6、espcctrunicancellationregistrationintheaccul-acyoltheproposedapproachistlcinonstrntetlthroughsccontlIcvcl.coniputcrsimulationslorcliffcrcrittypesofiinapcs.Let.f;(.K,y)rcprcscntthcrclcrcnceimageantlf2(x,y)isthespatiallyshiftedfranic.P,(Wx,Wy);indF,(Wx,Wy)a
7、retheFouriertransformoftheabovc2framcsrcspectively.1f.h(x,y)1.INTRODUCTIONisreplicaofj;(x,y)traiisl;itedby(x,,,y,,)androtatedbye,,accordingtothcFourierShiftr~heoreniandtheFourierRotationTheneedforiinagcregistrationarisesinnianyI'icklsofThcorcm[71theirtrar
8、isforrnarerelatedbyrcscnrch,whichinvolvedcornptririgof:Iseriesofimages,clciectionofchnnge.consolidationofdata,whercdilfcrcritirnagcsofthes;iincobjectriectltobehroughtinto/~*(W,,W,)==C'~~~~X(IV~J,,+W~y<,)I;,(iv,cosO,
