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一种新的结构光三维测量方法.docx

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一种新的结构光三维测量方法 Introduction Theuseofthree-dimensional(3D)measurementhasbecomemorecommoninvariousindustriessuchasmanufacturing,engineering,medicine,andentertainment.Structuredlight3Dmeasurementreferstotheprocessofusingprojectedpatternsontoatargetobjecttoextract3Dinformation.Thismethodispreferredbecauseofitssimplicity,speed,andtheabilitytoobtainaccuratedata.However,thereareseveralchallengesintraditionalstructuredlighttechniques,includingthedifficultyofachievinghigh-precisionmeasurement,theeffectofambientlightingontheresults,andthelimitationsofthesystem’sdynamicrange.Anewstructuredlight3Dmeasurementmethodhasbeendevelopedtoaddressthesechallengesandimprovetheaccuracyofmeasurementresults. Methodology Thenewstructuredlight3Dmeasurementmethodinvolvestheuseofadigitalmicromirrordevice(DMD)projectorandahigh-speedcamera.Unlikethetraditionalmethod,whereastaticpatternisprojectedontoanobject,thenewsystemusesadynamicpatternconsistingofmovingstripesprojectedontotheobject,generatedbytheDMDprojector.Thisdynamicpatternmethodallowsformorerobustrecognitionoffeaturepointsonthesurfaceoftheobject. Thehigh-speedcameracapturesimagesoftheobjectasthepatternisprojected,allowingforthereconstructionofthe3Dmodel.Additionally,amotioncompensationalgorithmisappliedtocorrectthedistortioncausedbytheobject’smovementduringtheprojectionandcaptureprocess,improvingthesystem’saccuracy.Furthermore,ambientlightisremovedbytheuseofabandpassfilter,whichblocksoutunwantedlightandenhancestheprojectedpattern’svisibility. Results Tovalidatethenewmethod’seffectiveness,anexperimentwasconductedtocomparetheaccuracyofthenewtechniquewiththetraditionalmethod,usingareferenceobjectwithaknowngeometry.Thenewmethodexhibitedahigheraccuracyof0.05mm,comparedtothetraditionalmethod,whichhadanaccuracyof0.1mm.Moreover,thenewmethodwaslessaffectedbyambientlight,whichimprovedtherobustnessofthesystem. Discussion Thenewstructuredlight3Dmeasurementmethodshowssignificantimprovementsintermsofaccuracyandrobustness,comparedtotraditionalmethods.Thea