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3D reconstruction of naturally fragmenting warhead fragments
Thesis (MSc)--Stellenbosch University, 2024.
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| Format: | Thesis |
| Language: | en_ZA en_ZA |
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Stellenbosch : Stellenbosch University
2024
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| _version_ | 1867613865603235840 |
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| access_status_str | Open Access |
| author | Sequeira, Jose |
| author2 | Smit, Francois |
| author_browse | Sequeira, Jose Smit, Francois |
| author_facet | Smit, Francois Sequeira, Jose |
| author_sort | Sequeira, Jose |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc)--Stellenbosch University, 2024. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/130380 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA en_ZA |
| last_indexed | 2026-06-10T12:42:55.322Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/130380 3D reconstruction of naturally fragmenting warhead fragments Sequeira, Jose Smit, Francois Coetzer, Johannes Stellenbosch University. Faculty of Science. Dept. of Applied Mathematics. Ammunition Armaments -- South Africa Image processing -- Digital techniques Images, Photographic Warheads -- Mathematical models Computer vision -- Data processing Three-dimensional display systems Silhouettes -- Data processing UCTD Thesis (MSc)--Stellenbosch University, 2024. ENGLISH ABSTRACT: This study starts with a brief introduction to the South African armaments and ammunition technology industry, highlighting the historical alignment with NATO standards. The focal point is the investigation into the potential of an existing NATO-compliant icosahedral imaging system to ascertain additional geometric features of fragments, such as mass and volume. Building on prior work, the author proposes leveraging extensive image data sets acquired through the icosahedral imaging system to determine these features. The literature study explores two key approaches: stereo vision and shape-from-silhouette 3D reconstruction. The latter emerges as the favored method, particularly due to how well the technique complements the icosahedral camera arrangement. Subsequently, attention is directed toward the electro-mechanical design of the icosahedral imaging instrument and the creation of shape-from-silhouette reconstruction software. Challenges in calibrating the multi-imaging system are addressed through hardware upgrades. The study advances to experimental results, involving the analysis of fragments recovered from a warhead arena test. Average presented areas are determined, and 3D reconstructed models are obtained using the shape-from-silhouette technique, with errors ranging from 2% to 54%. A detailed discussion follows, highlighting the similar average presented area measurements for different icosahedral imaging systems. The inclusion of shadow regions is noted to significantly impact the accuracy of the 3D reconstruction process. Furthermore, slender fragments exhibit smaller errors compared to non-slender counterparts. The study concludes by affirming the achievement of the primary objectives, namely, the ability to use fragment silhouettes obtained during average presented area measurements to produce close-fit 3D models of fragments. Future work is underscored, building upon the strong foundation laid by this investigation. Recommendations, improvements, and suggestions for future research are provided, emphasizing the potential for enhanced reconstruction accuracy, particularly for non-slender fragments, with increased camera deployment. AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar. Masters 2024-02-26T19:01:40Z 2024-04-26T15:30:15Z 2024-02-26T19:01:40Z 2024-04-26T15:30:15Z 2024-03 Thesis https://scholar.sun.ac.za/handle/10019.1/130380 en_ZA en_ZA Stellenbosch University xiii, 68 pages : illustrations (some color) application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Ammunition Armaments -- South Africa Image processing -- Digital techniques Images, Photographic Warheads -- Mathematical models Computer vision -- Data processing Three-dimensional display systems Silhouettes -- Data processing UCTD Sequeira, Jose 3D reconstruction of naturally fragmenting warhead fragments |
| title | 3D reconstruction of naturally fragmenting warhead fragments |
| title_full | 3D reconstruction of naturally fragmenting warhead fragments |
| title_fullStr | 3D reconstruction of naturally fragmenting warhead fragments |
| title_full_unstemmed | 3D reconstruction of naturally fragmenting warhead fragments |
| title_short | 3D reconstruction of naturally fragmenting warhead fragments |
| title_sort | 3d reconstruction of naturally fragmenting warhead fragments |
| topic | Ammunition Armaments -- South Africa Image processing -- Digital techniques Images, Photographic Warheads -- Mathematical models Computer vision -- Data processing Three-dimensional display systems Silhouettes -- Data processing UCTD |
| url | https://scholar.sun.ac.za/handle/10019.1/130380 |
| work_keys_str_mv | AT sequeirajose 3dreconstructionofnaturallyfragmentingwarheadfragments |