Semi-automatic extraction of primitive geometric entities from point clouds

dc.contributor.advisorBasson, A. H.
dc.contributor.authorGoussard, Charl Leonard
dc.contributor.otherStellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering.en_ZA
dc.descriptionThesis (MScEng)--University of Stellenbosch, 2001.en_ZA
dc.description.abstractENGLISH ABSTRACT: This thesis describes an algorithm to extract primitive geometric entities (flat planes, spheres or cylinders, as determined by the user's inputs) from unstructured, unsegmented point clouds. The algorithm extracts whole entities or only parts thereof. The entity boundaries are computed automatically. Minimal user interaction is required to extract these entities. The algorithm is accurate and robust. The algorithm is intended for use in the reverse engineering environment. Point clouds created in this environment typically have normal error distributions. Comprehensive testing and results are shown as well as the algorithm's usefulness in the reverse engineering environment.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Hierdie tesis beskryf 'n algoritme wat primitiewe geometriese entiteite (plat vlakke, sfere of silinders na gelang van die gebruiker se inset) pas op ongestruktureerde, ongesegmenteerde puntewolke. Die algoritme pas geslote geometriese entiteite of slegs dele daarvan. Die grense van hierdie entiteite word automaties bereken. Minimale gebruikersinteraksie word benodig om die geometriese entiteite te pas. Die algoritme is akkuraat en robuust. Die algoritme is ontwikkel vir gebruik in die truwaartse ingenieurswese omgewing. Puntewolke opgemeet in hierdie omgewing het tipies meetfoute met 'n normaal verdeling. Omvattende toetsing en resultate word getoon en daarmee ook die nut wat die algoritme vir die gebruiksomgewing inhou.af_ZA
dc.format.extent1 v. (various foliations) : ill.
dc.publisherStellenbosch : Stellenbosch Universityen_ZA
dc.subjectReverse engineeringen_ZA
dc.subjectGeometry, Analytic -- Soliden_ZA
dc.subjectDissertations -- Mechanical engineeringen_ZA
dc.subjectTheses -- Mechanical engineeringen_ZA
dc.titleSemi-automatic extraction of primitive geometric entities from point cloudsen_ZA
dc.rights.holderStellenbosch Universityen_ZA

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