Efficient Point-Based Rendering Using Image Reconstruction

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1、EurographicsSymposiumonPoint-BasedGraphics(2007)M.Botsch,R.Pajarola(Editors)EfficientPoint-BasedRenderingUsingImageReconstructionRicardoMarroquim1,MartinKraus2,andPauloRomaCavalcanti11UniversidadeFederaldoRiodeJaneiro,Brazil2TechnischeUniversitätMünchen,GermanyAbstractImage-spac

2、ereconstructionofcontinuoussurfacesfromscatteredone-pixelprojectionsofpointsisknowntopo-tentiallyofferanadvantageoustimecomplexitycomparedtosurfacesplattingtechniques.Weproposeanewalgo-rithmforhardware-acceleratedimage-spacereconstructionusingpull-pushinterpolationandpresentane

3、fficientGPUimplementation.Comparedtopublishedimage-spacereconstructionapproachesemployingthepull-pushinterpolation,ourmethodoffersasignificantlyimprovedimagequalitybecauseoftheintegrationofellipticbox-filtersandsupportfordeferredPhongshading.Forlargepoint-basedmodels,ourGPUimpleme

4、ntationiscapableofrenderingmorethan50Mpointspersecondincludingimage-spacereconstructionanddeferredshading.CategoriesandSubjectDescriptors(accordingtoACMCCS):I.3.3[ComputerGraphics]:BitmapandframebufferoperationsDisplayalgorithmsViewingalgorithms;I.3.7[ComputerGraphics]:Hiddenli

5、ne/surfaceremoval1.Introductionconsistingofmpixels,i.e.,itisindependentofthenumberofprojectedsplats.Point-basedgraphicshaveevolvedfromaspecializedtoolforparticlesystems[CHP∗79]tooneofthemostpower-Manyalternativepoint-basedrenderingtechniqueshavefulconceptsincomputergraphics.Inn

6、umerousapplications,beenpublishedintheliteratureonpoint-renderingtech-pointshavebeenproventobeasuitableprimitiveformodelniques.Oneofthebasicrequirementsforanysurfaceren-acquisition,processing,animation,andrendering[GP07].deringmethodisthereconstructionofcontinuoussurfacesInthis

7、work,wefocusonpoint-basedsurfacerenderingonwithoutholes.Whiletheseholesareavoidedbyasuffi-GPUs(graphicsprocessingunits).cientlyhighinitialsamplingrate[LW85],thissolutionisnotalwayspracticalorpossible.AnalternativeapproachTheperformanceofprogrammableGPUshasbeensuc-isthefillingofho

8、lesbyanimage-spacereconstructioncessfullyemployedforre