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Signal and image processing for electrical resistance tomography
Bibliography: leaves 139-150.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Electrical Engineering
2014
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| _version_ | 1867613529425575936 |
|---|---|
| access_status_str | Open Access |
| author | Naidoo, Thoneshan |
| author2 | Wilkinson, Andrew John |
| author_browse | Naidoo, Thoneshan Wilkinson, Andrew John |
| author_facet | Wilkinson, Andrew John Naidoo, Thoneshan |
| author_sort | Naidoo, Thoneshan |
| collection | Thesis |
| description | Bibliography: leaves 139-150. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5140 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:37:35.986Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/5140 Signal and image processing for electrical resistance tomography Naidoo, Thoneshan Wilkinson, Andrew John Electrical Engineering Bibliography: leaves 139-150. Electrical Resistance Tomography (ERT) is in essence an imaging technique.In ERT current is injected into and removed from a vessel via paired electrodes. The resulting voltage measurements are captured between the remaining electrode pairs. The principle behind ERT is to map these boundary voltages into a conductivity distribution that represents the domain of the vessel. The author has coded a versatile reconstruction algorithm based on the Newton-Raphson algorithm. The knowledge gained by implementing the algorithm is documented in this thesis. The literature covers the basic aspects of two-dimensional and three-dimensional ERT. It is hoped that this thesis will create a greater interest in ERT at the University of Cape Town (UCT) and also act as a building block for further developments. The thesis starts by presenting the basic concepts of ERT such as the underlying equations, the various boundary measurement strategies and a global perspective of ERT. The nature of this thesis is on software reconstruction and in so doing information on the incorporation of the Finite Element Method in ERT is provided. The thesis goes on to provide information about the reconstruction algorithms, which incorporate regularization. A novel aspect of this thesis involves the calibration and pre-processing of boundary voltages. These concepts were conceptualised and developed during formal communications with Dr. Wilkinson (2002) and Randal (2002). The calibration schemes try to eliminate the potential errors that can arise inthe captured data thus allowing for a clearer image to be reconstructed, Electrical Resistance Tomography. This thesis further develops the idea of parallelizing the Newton-Raphson algorithm to increase the speed of the algorithm. Various schemes on how this parallelization is achievable are put forward. 2014-07-31T10:54:21Z 2014-07-31T10:54:21Z 2002 Master Thesis Masters MSc http://hdl.handle.net/11427/5140 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Electrical Engineering Naidoo, Thoneshan Signal and image processing for electrical resistance tomography |
| thesis_degree_str | Master's |
| title | Signal and image processing for electrical resistance tomography |
| title_full | Signal and image processing for electrical resistance tomography |
| title_fullStr | Signal and image processing for electrical resistance tomography |
| title_full_unstemmed | Signal and image processing for electrical resistance tomography |
| title_short | Signal and image processing for electrical resistance tomography |
| title_sort | signal and image processing for electrical resistance tomography |
| topic | Electrical Engineering |
| url | http://hdl.handle.net/11427/5140 |
| work_keys_str_mv | AT naidoothoneshan signalandimageprocessingforelectricalresistancetomography |