Image Based Rendering And Modeling Techniques And Their Application_图像拼接建模技术及其应用课件.ppt

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1、ImageBasedRenderingAndModelingTechniquesAndTheirApplicationsImageBasedRendering(IBR)PARTITraditionalComputerGraphicsUsegeometryandlightingmodeltosimulatetheimagingprocessandgeneraterealisticsceneNoguaranteesfortherightnessofthemodelsAlotofcomputation

2、timeneededUseofImagesinComputerGraphicsTexturemappingEnvironmentmapHowaboutmoreimages?ImageBasedRenderingIBR:ToSynthesizeanewscenewithnovelviewpointbasedongivenimagesAFrameworkofImageBasedRenderingRealSceneSamplingSystemDataStorageSystemDatarepresent

3、ationSystemRenderingSystemSynthesizedviewTheKeyPartofIBRThedatarepresentationsystemisthekeypartofIBR,Itdeterminestheotherthreesubsystems.-AtaxonomybasedonthedatarepresentationsystemATaxonomyofIBRTheGeometrybaseddatarepresentationTheImagebaseddatarepr

4、esentationTheplenopticfunctionbaseddatarepresentationTheGeometryBasedDataRepresentationGeometryelementsusedasdatarepresentationinIBR:polyhedra(Debevec,et.al1996)layers(Baker,SzeliskiandAnandan1998)points(Shadeetal.1998)SimilartotraditionalComputerGra

5、phics,exceptthegeometrymodelcomesfromimagesImageBasedDataRepresentationdataaretreatedasaseriesofimageswithcorrespondencerelations“opticalflow”“morphingmap”forward/reversemapping;morphingExamples:Viewinterpolation(ChenandWilliam,1993)ViewMorphing(Seit

6、zandDyer1998)PlenopticFunctionBasedDataRepresentationPlenopticfunction(AdelsonandBergen,1991)RepresentativeIBRMethodsBasedonPlenopticFunctionsPlenopticModeling:5DLightfield/Lumigraph:4DConcentricMosaics:3DPanorama:2D[L.McMillan95][M.Levoy96,S.J.Gortl

7、er96][H.Y.Shum99][S.E.Chen95,R.Szeliski97]ConclusionTheprogressofIBRtechniqueisalsotheprogressofnewdatarepresentationmethod.Wetreatanimage:astextureingeometrytexturemappingasimageswithcorrespondencerelationviewinterpolation/morphingaslightbeamslig

8、htfieldasslitimageconcentricmosaics...DemoofIBR(1)TourinDunhuangArtCaveDemoofIBR(2)TourinLingyinTempleinHangzhouImageBasedModeling(IBM)PARTIITheCommonMethodsUsedforModelingobjectsUsingGeometryModelingSoftwarePackages,suchas3DMAX，Mayer，SoftImageandAu