投影柵相位法在三維形貌測量上的研究與應(yīng)用.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文投影柵相位法在三維形貌測量上的研究與應(yīng)用姓名：席崚申請學(xué)位級別：碩士專業(yè)：測試計(jì)量技術(shù)與儀器指導(dǎo)教師：丁萬山20090101投影柵相位法在三維形貌測量方法研究與應(yīng)用IIAbstractThreedimensionalProfilereconstructions(3DPR)iswidelyappliedindifferentfields，suchasreverseengineeringcomputervisio

2、nonlineproductinspectionmodeldesignmedicaltreatment.Withtherapiddevelopmentofcomputerrelateddevices，researcherspaymeattentiontothe3DPRbasedonopticalmethodswhichbearwithactivenoncontactingproperties.Atpresent，thereconstru

3、ctionsystemscanbedividedintofourcategiesactiveopticaltriangulationlaserinterferometrytimeinflightfringeprojection.ThefringeprojectionisbecomingpopularfitshighPrecision，rapidresponse，lowlimitationsfromtheenvironment.Inthi

4、sPaper3DPRusingfringeprojectionmethodiscarriedout.Themajcontributionsareasfollows:Firstlythebasicprincipleofthe3DPRbasedonfringeprojectionisdescribed.Themethodemploysatypicalcrossedopticalaxessystemprojectsstructuredgrat

5、ingswhicharegeneratedbycomputerontothesurfaceofobjectobtainsthedisttionfringepatternswhichcontaintheobjectphaseinfmationoftheondigitalcamera.Threemethods，includingphaseshiftmethods(PSM)whichareusedtodemodulatethephaseinf

6、mationfromthedisttionfringepatternarediscussed，Secondly，severalimprovedfringeprojectiontechnologiesarereviewed.Thedemodulatedphaseiswrappedin[ππ]whichneedstobeunwrappedtoretrievetherealphaseinfmationbyemployingsuitableph

7、aseunwrappingalgithm.Howeveritisdifficulttoobtainthephaseatagreataccuracybecauseofthedeviantjumpofphasecausedbysystemnoises.Thevirtualgratingnotonlygainmeaccuratesolutionphasebutalsocansolvethemutantstrainobtainthreedime

8、nsionalimagesofobjects.Thirdly，afterthesystemcapturedimagesthroughtheCCDcameraimagewasprocessedbycontrolsoftware，itwouldprocessthesystemcalibration，obtainedtheimptantparametersof3Dprofilehighinfmation.Duringthecapturingp

9、rocessingimage，itdesignedthesoftwarewithVC6.0languagecompletedsomeoffunctionsincludingthecapturingimage，switchingbitmap，transfmingthresholdsoon，researchedthesystemcalibrationalgithmunwrappedwiththeMATLABR2007b.Thebasicst

10、udyabout3Dreconstructionusingthefringeprojectionisdiscussed.Thetheeticalanalysis，systemsetup，computersimulationcrespondingexperimentalresultsprovideapromisingresearchfieldinthefuture.KeyWds:3DProfileFringeProjectionPhase