资源描述：
《High-resolution，Real-time 3D Shape Acquisition.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、High-resolution,Real-time3DShapeAcquisitionSongZhangandPeisenHuangDepartmentofMechanicalEngineering,StateUniversityofNewYorkatStonyBrookStonyBrook,NewYork,11794-2300,USAEmail:{song.zhang,peisen.huang}sunysb.eduAbstractInthispaperwedescribeahigh-resolution,real-time3Dshapeacquisiti
2、onsystembasedonstructuredlighttech-niques.ThissystemusesacolorpatternwhoseRGBchan-nelsarecodedwitheithersinusoidalortrapezoidalfringepatterns.WhenprojectedbyamodifiedDLPprojector(colorfiltersremoved),thiscolorpatternresultsinthreegrayscalepatternsprojectedsequentiallyatafrequencyof2
3、40Hz.Ahigh-speedB/WCCDcamerasynchronizedwiththeprojectorcapturesthethreeimages,fromwhichthe3Dshapeoftheobjectisreconstructed.AcolorCCDcameraisalsousedtocaptureimagesfortexturemap-ping.Themaximum3Dshapeacquisitionspeedis120Hz(532×500pixels),whichishighenoughforcaptur-ingthe3Dshapes
4、ofmovingobjects.Twocodingmethods,sinusoidalphase-shiftingmethodandtrapezoidalphase-shiftingmethod,weretestedandresultswithgoodaccu-racywereobtained.Thetrapezoidalphase-shiftingalgo-rithmalsomakesreal-time3Dreconstructionpossible.1.Introduction3Dshapeacquisitionhasapplicationsinsuc
5、hdiversear-easascomputergraphics,virtualreality,medicaldiagnos-tics,roboticvision,industrialinspection,reverseengineer-ing,etc.[1,2,3,4,5,6].Withtherecenttechnologicaladvancesindigitalimaging,digitalprojectiondisplay,andpersonalcomputers(PCs),itisbecomingincreasinglypos-siblefor3D
6、shapeacquisitiontobedoneinrealtime.Amongalltheexistingrangingtechniques[7],stereo-Figure1.3Dmodelsofahumanfaceacquiredbyourvisionisprobablythemoststudiedmethod.Traditionalreal-time3Dshapeacquisitionsystem.Theacquisi-stereovisionmethodsestimateshapebyestablishingspa-tionframeratewa
7、s120Hzandtheresolutionwas532tialcorrespondenceofpixelsinapairofstereoimages.×500pixels.Twoseparateframesselectedfromase-Recently,Zhangetal.[8]andDavisetal.[9]developedquenceofover60framesaredisplayedhere.Toprow:anewconceptcalledspacetimestereo,whichextendsthemodelswithcolortexture
8、mapping.Middlerow:mod-matchingofs
