3D reconstruction of naturally fragmenting warhead fragments

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dc.contributor.advisorSmit, Francoisen_ZA
dc.contributor.advisorCoetzer, Johannesen_ZA
dc.contributor.authorSequeira, Joseen_ZA
dc.contributor.otherStellenbosch University. Faculty of Science. Dept. of Applied Mathematics.en_ZA
dc.date.accessioned2024-02-26T19:01:40Z
dc.date.accessioned2024-04-26T15:30:15Z
dc.date.available2024-02-26T19:01:40Z
dc.date.available2024-04-26T15:30:15Z
dc.date.issued2024-03
dc.descriptionThesis (MSc)--Stellenbosch University, 2024. en_ZA
dc.description.abstractENGLISH 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.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Geen opsomming beskikbaar.en_ZA
dc.description.versionMastersen_ZA
dc.format.extentxiii, 68 pages : illustrations (some color)en_ZA
dc.identifier.urihttps://scholar.sun.ac.za/handle/10019.1/130380
dc.language.isoen_ZAen_ZA
dc.language.isoen_ZAen_ZA
dc.publisherStellenbosch : Stellenbosch Universityen_ZA
dc.rights.holderStellenbosch Universityen_ZA
dc.subject.lcshAmmunitionen_ZA
dc.subject.lcshArmaments -- South Africaen_ZA
dc.subject.lcshImage processing -- Digital techniquesen_ZA
dc.subject.lcshImages, Photographicen_ZA
dc.subject.lcshWarheads -- Mathematical modelsen_ZA
dc.subject.lcshComputer vision -- Data processingen_ZA
dc.subject.lcshThree-dimensional display systemsen_ZA
dc.subject.lcshSilhouettes -- Data processingen_ZA
dc.subject.nameUCTDen_ZA
dc.title3D reconstruction of naturally fragmenting warhead fragmentsen_ZA
dc.typeThesisen_ZA
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