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Classification of ocean vessels from low resolution satellite SAR images
Dissertation (MEng)--University of Pretoria, 2017.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2018
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| _version_ | 1867613481107193857 |
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| access_status_str | Open Access |
| author2 | Kleynhans, Waldo |
| author_browse | Kleynhans, Waldo |
| author_facet | Kleynhans, Waldo |
| collection | Thesis |
| dc_rights_str_mv | © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/66224 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:49.885Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/66224 Classification of ocean vessels from low resolution satellite SAR images Kleynhans, Waldo mrrgvm@gmail.com Meyer, Rory George Vincent UCTD Synthetic Aperture Radar Automatic Identification System Support Vector Machine Regression Classification Dissertation (MEng)--University of Pretoria, 2017. In the long term it is beneficial to a country's economy to exploit the maritime environment surrounding it responsibly. It is also beneficial to protect this environment from poaching and pollution. To achieve this the responsible parties of a country must have an awareness of what is transpiring in the maritime domain. Synthetic aperture radar can provide an image, regardless of weather or light conditions, of the ocean showing most vessels therein. To monitor the ocean, using synthetic aperture radar imagery, at the lowest cost would require large swath synthetic aperture radar imagery. There exists a trade-off between large swath imagery and the image's resolution resulting in the largest swath image having the poorest resolution. Existing research has shown that it is possible to use coarse resolution synthetic aperture radar imagery to detect vessels at sea, but little work has been done on classifying those vessels. This research aims to investigate the coarse resolution classification information gap. This is done by using a dataset of matching synthetic aperture radar and ship transponder data to train a statistical classification algorithm in order to classify or estimate the length of vessels based on features extracted from their synthetic aperture radar image. The results of this research show that coarse resolution (approximately 40 m per pixel) synthetic aperture radar imagery is able to estimate vessel size for larger classes and provides insight on which vessel classes would require finer resolutions in order to be detected and classified reliably. The range of smaller vessel classes is usually limited to ports and fishing zones. These zones can be mapped using historical vessel transponder data and so a dedicated surveillance campaign can be optimised to use higher resolution products in these areas. The size estimation from the machine learning algorithm performs better than current techniques. Electrical, Electronic and Computer Engineering MEng Unrestricted 2018-08-17T09:42:43Z 2018-08-17T09:42:43Z 2005/03/18 2017 Dissertation Meyer, RGV 2017, Classification of ocean vessels from low resolution satellite SAR images, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/66224> A2018 http://hdl.handle.net/2263/66224 en © 2018 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Synthetic Aperture Radar Automatic Identification System Support Vector Machine Regression Classification Classification of ocean vessels from low resolution satellite SAR images |
| title | Classification of ocean vessels from low resolution satellite SAR images |
| title_full | Classification of ocean vessels from low resolution satellite SAR images |
| title_fullStr | Classification of ocean vessels from low resolution satellite SAR images |
| title_full_unstemmed | Classification of ocean vessels from low resolution satellite SAR images |
| title_short | Classification of ocean vessels from low resolution satellite SAR images |
| title_sort | classification of ocean vessels from low resolution satellite sar images |
| topic | UCTD Synthetic Aperture Radar Automatic Identification System Support Vector Machine Regression Classification |
| url | http://hdl.handle.net/2263/66224 |