Hardware-Accelerated Rendering of Photo Hulls

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1、EUROGRAPHICS2004/M.-P.CaniandM.SlaterVolume23(2004),Number3(GuestEditors)Hardware-AcceleratedRenderingofPhotoHullsMingLi,MarcusMagnorandHans-PeterSeidelMPIInformatik,Saarbrücken,GermanyAbstractThispaperpresentsanefficienthardware-acceleratedmethodfornovelviewsynthesisfromasetofimagesorvideos.Ourme

2、thodisbasedonthephotohullrepresentation,whichisthemaximalphoto-consistentshape.Weavoidtheexplicitreconstructionofphotohullsbyadoptingaview-dependentplane-sweepingstrategy.Fromthetargetviewpointslicingplanesarerenderedwithreferenceviewsprojectedontothem.Graphicshardwareisex-ploitedtoverifythephoto

3、-consistencyofeachrasterizedfragment.Visibilitieswithrespecttoreferenceviewsareproperlymodeled,andonlyphoto-consistentfragmentsarekeptandcoloredinthetargetview.Wepresentexperimentswithrealimagesandanimationsequences.Thankstothemoreaccurateshapeofthephotohullrep-resentation,ourmethodgeneratesmorer

4、ealisticrenderingresultsthanmethodsbasedonvisualhulls.Currently,weachieverenderingframeratesof2-3fps.Comparedtoapuresoftwareimplementation,theperformanceofourhardware-acceleratedmethodisapproximately7timesfaster.CategoriesandSubjectDescriptors(accordingtoACMCCS):CRCategories:I.3.3[ComputerGraphic

5、s]:Pic-ture/ImageGeneration;I.3.7[ComputerGraphics]:Three-DimensionalGraphicsandRealism.1.Introductioncolorinformationintheinputimagestoperformmoreaccu-rate3Dreconstruction[KS00].TheresultisoftenreferredtoOverthelastdecade,novelviewsynthesisfrommultipleasthephotohull.Althoughgenerallyitprovidesbe

6、tterren-realimageshasbecomeaninterdisciplinaryresearchfieldderingresults,itsslowreconstructionperformancepreventsbetweencomputergraphicsandcomputervision.Sincerealthisapproachfrombeingappliedininteractiveorreal-timeimagesareusedasinput,thistechniquelendsitselftopre-viewsynthesissystems.servingfined

7、etailandcomplexlightingeffectsexistingintheoriginalimages,andhenceiscapableofgeneratingphoto-realisticvirtualviews.Thispaperaddressestheperformanceissueandpresentsanefficienthardware-acceleratedmethodtorenderphotoTradit