Thesis (MScEng)--University of Stellenbosch, 2001. / ENGLISH 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. / AFRIKAANSE 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.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/52449 |
| Date | 12 1900 |
| Creators | Goussard, Charl Leonard |
| Contributors | Basson, A. H., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | 1 v. (various foliations) : ill. |
| Rights | Stellenbosch University |
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