简介:Itisaresearchsubjectincomputervisionto3Dreconstructionofanobjectrepresentedbyasingle2Dlinedrawing.Previousworkson3Dreconstructionfrom2Dlinedrawingsfocusonobjectswithlines,plane,view,andsoon.Thispapermainlystudiesthe3Dreconstructionfrom2Dlinedrawings.Besides,anewapproachisproposed:itisthatfortheresearchofthepointcoordinatesof2Dlinedrawings,soastoachievetheobjectreconstructionbythereconstructionofpointcoordinates.Thereconstructionprocessincludes:①thecollectionofpointcoordinates(X,Y)of2Dlinedrawings;②thederivationofmathematicalformulaaboutthereconstructionofthepointof2Dlinedrawings,andcalculatingthecorrespondingpointofthe3Dcoordinates;③theregenerationof3Dgraphicswith3Dpoints;④analyzeerrorbytheproportionalofparallelofaxonometricprojection,inordertoprovetheaccuracyofthemethod.
简介:2D/3DIsometricTransformationUsingSpring_MasSystemFanJin1MathewM.F.Yuen2QifuWang1ZhouJi11TheCADCenterofTheHuazhongUnviersityof...
简介:Insteadoftraditionallyusinga3Dphysicalmodelwithmanycontrolpointsonit,acalibrationplatewithprintedchessgridandmovablealongitsnormaldirectionisimplementedtoprovidelargearea3DcontrolpointswithvariableZvalues.Experimentsshowthattheapproachpresentediseffectiveforreconstructing3Dcolorobjectsincomputervisionsystem.
简介:Thehumanvisionsystemcanreconstructa3Dobjecteasilyfromsingle2Dlinedrawingsevenifthehiddenlinesoftheobjectareinvisible.Now,therearemanymethodshaveemulatedthisability,butwhenthehiddenlinesoftheobjectareinvisible,thesemethodscannotreconstructacomplete3Dobject.Therefore,weputforwardanewalgorithmtosettlethishardproblem.Ourapproachconsistsoftwosteps:(1)infertheinvisibleverticesandedgestocompletethelinedrawing,(2)proposeavertex-basedoptimizationmethodtoreconstructa3Dobject.
简介:1IntroductionMechanicalCADsystemsuse3Dgeometricrepresentationtoformtheglobalproductinformationmodelforsatisfyingthewholelife...
简介:Asimplerobust'strutalgorithm'ispresentedwhich,whengivenagraphembeddedin3Dspace,thickensitsedgesintosolidstruts.Variousapplications,crystallographicandsculptural,areshowninwhichsmoothhigh-genusformsaretheoutput.Atoolboxofalgorithmictechniquesallowforavarietyofnovel,visuallyengagingformsthatexpressamathematicalaesthetic.Insculpturalexamples,hyperbolictessellationsinthePoincaréplanearetransformedinseveralwaystothree-dimensionalnetworksofedgesembodiedwithinaplausiblyorganicorganization.Bytheuseofdifferenttransformationsandadjustableparametersinthealgorithms,avarietyofattractiveformsresult.Thetechniquesproducewatertightboundaryrepresentationsthatcanbebuiltwithsolidfreeformfabricationequipment.Thefinalphysicaloutputsatisfiesthe'coolnesscriterion,'thatpassersbywillpickthemupandsay'Wow,that'scool!'