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1、ⅡRESEARCHFoRTHREE—DIMENSIoNALLASERSCANNINGTECHNoLoGYABSTRACTThree．dimensionallaserscanningtechnologyisonehigh-techwhichcombineoptical．mechanic．electricwithcomputer，reflectingtheobjectiveinformationofspatialdataincludingreal-time，dynamicchanges，realmorphologicalcharacteristics．Th
2、ree—dimensionallaserscanningtechnologyhasabroadapplicationprospectsinthefieldofmultimediaanimation，reverseengineering，researchandanalysis，preservationandreconstruction．Therefore，itiSofsignificanceandapplicationvaluetostudythistechnology．Laserscanningsystemdevicewascomposedofthre
3、eparts：thelinelasersource，dualcameras，rotatingplatforms，controlplatform，dataprocessingsoftwareandotheraccessories．Thispapercouldgetthethree—dimensionalcoordinatesofthemeasuredobject’Ssurfacerapiddlybyusinganewthree．dimensionalinformationacquisitionmethod，getlaserstripebyusinglas
4、erirradiationtothesurfaceofthedetectedobjects，andextractthree．dimensionalinformationbyusingtherightandleftcameraimagesaroundthemeasuredobject．Thisparerseekedthebestsegmentationthresholdforbinarizationprocessingbyextractingtheprovisionsoftheimage．Inordertoachievethepurposeofinhib
5、ition，removingnoiseandreducetheobjectcontourextractioneffectsofnoisepointstothree—dimensionallaserscandata，itusedasimplelocalsmoothing，transfinite—pixelsmoothing，medianfiltering．Onbasisofthese，thepaperanalysedthemathematicalprincipleofCannyedgedetectoralgorithmdeeplyanddescriped
6、therealizationprocessofalgorithmadetail．Thenalargenumberofredundantinformationwascompressdtosettheminimumthresholdvalueofscreeninginthepaper，andanalyedbyimagingcameramodelanddistortionmodel，calibrationmethodinthetemplatebasedonanimprovedcameracalibration．IIIItcanmakethetradition
7、alsingle—pointmeasurementdataacquisitionintoautomaticacquisitionofmeasurementdata，byusingtheimprovedlinelaserasathree-dimensionallaserscanningsystemoflaserlightsource．SOthatitcanachievetheimprovementoftheobservation’Saccuracyandspeed．KEYWORDS：laser，three—dimensional，measurement，
8、cameraCalib—ration，noisefilteringIV??????．．I???
