Recovering the Shape of Planar Object Depicted by a Line Drawing under Axonometric Projection-中国期刊网

摘要 AnewapproachisproposedforautomaticallycreatingB-repmodelsofathree-dimensionalplanarobjectfromalinedrawingdepictingtheobjectunderorthographicallyaxonometricprojection.Anewlineparameterizationthatsatisfiestheuniqueness,boundednessanduniformnessforrepresentinglinesin2Dand3Dspaceisgiven.Accordingtothelocationrelationbetweenlinesandplanesofobjectdepictedbythelinedrawing,someconstraintsaboutobject's3Dinformationareproducedandalinearsystembasedonthoseconstraintsisestablished.3Dinformationofaplanarbodycanbeobtainedbysolvingthelinearsystem.Itisprovedthat,duringtheprocessing,thereexistedatleastfourdegreesoffreedom.ItismoreconvenienttouseinformationaboutlinesandplanesinsteadofpointsandplanesforcomputervisionandintelligentCADsystemstointerpretlinedrawingsofplanarobjects.

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Recovering the Shape of Planar Object Depicted by a Line Drawing under Axonometric Projection

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Recovering the Shape of Planar Object Depicted by a Line Drawing under Axonometric Projection

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