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Automated stratigraphic classification and feature detection from images of borehole cores
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2007
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| _version_ | 1867613902677737472 |
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| access_status_str | Open Access |
| author | Van der Walt, Stefan Johann |
| author2 | Cloete, J. H. |
| author_browse | Cloete, J. H. Van der Walt, Stefan Johann |
| author_facet | Cloete, J. H. Van der Walt, Stefan Johann |
| author_sort | Van der Walt, Stefan Johann |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2045 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:43:31.605Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2045 Automated stratigraphic classification and feature detection from images of borehole cores Van der Walt, Stefan Johann Cloete, J. H. Herbst, B. M. University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Image processing Rocks -- Analysis Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005. This thesis describes techniques proposed for analysing images of borehole cores. We address two problems: firstly, the automated stratigraphic classification of cores based on texture and secondly, the location of thin chromitite layers hidden in pyroxenite cores. Texture features of different rock types are extracted using wavelets, the theory of which provides an intuitive and powerful tool for this purpose. A Bayesian classifier is trained and used to discriminate between different samples. Thin, planar chromitite layers are located using a shortest path algorithm. In order to estimate the physical orientation of any layer found, a sinusoidal curve is fitted. The proposed algorithms were implemented and tested on samples taken from photographed cores. A high success rate was obtained in rock classification, and thin planar layers were located and characterised. 2007-01-22T12:06:26Z 2010-06-01T08:39:28Z 2007-01-22T12:06:26Z 2010-06-01T08:39:28Z 2005-03 Thesis http://hdl.handle.net/10019.1/2045 en University of Stellenbosch 3775840 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Image processing Rocks -- Analysis Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering Van der Walt, Stefan Johann Automated stratigraphic classification and feature detection from images of borehole cores |
| title | Automated stratigraphic classification and feature detection from images of borehole cores |
| title_full | Automated stratigraphic classification and feature detection from images of borehole cores |
| title_fullStr | Automated stratigraphic classification and feature detection from images of borehole cores |
| title_full_unstemmed | Automated stratigraphic classification and feature detection from images of borehole cores |
| title_short | Automated stratigraphic classification and feature detection from images of borehole cores |
| title_sort | automated stratigraphic classification and feature detection from images of borehole cores |
| topic | Image processing Rocks -- Analysis Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering |
| url | http://hdl.handle.net/10019.1/2045 |
| work_keys_str_mv | AT vanderwaltstefanjohann automatedstratigraphicclassificationandfeaturedetectionfromimagesofboreholecores |