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Light beam tracing for multi-bounce specular and glossy transport paths
Thesis (PhD)--University of Pretoria, 2015.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2015
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| _version_ | 1867613597095428096 |
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| access_status_str | Open Access |
| author2 | Kourie, Derrick G. |
| author_browse | Kourie, Derrick G. |
| author_facet | Kourie, Derrick G. |
| collection | Thesis |
| dc_rights_str_mv | © 2015 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 | Thesis (PhD)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/50893 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:40.521Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| 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:2263/50893 Light beam tracing for multi-bounce specular and glossy transport paths Kourie, Derrick G. bduvenhage@csir.co.za Bouatouch, K. Duvenhage, Bernardt UCTD Light beam tracing Glossy transport paths Multi-bounce specular transport Light transport algorithms Realistic image synthesis Computer-Aided Design (CAD) Engineering, built environment and information technology theses SDG-09 Thesis (PhD)--University of Pretoria, 2015. Light beam tracing is an e cient rendering algorithm for simulating caustics, the envelopes of light that are scattered from shiny curved surfaces and focussed into lines or spots of concentrated light. Light beam tracing is e cient for rendering caustics because the algorithm is able to exploit the coherency of the transport paths within an envelope of light. However, light beam tracing rendering algorithms found in the literature only support mirror-like specular surface interactions. Therefore, there is motive for extending light beam tracing to include more realistic roughened specular and other glossy surfaces while maintaining the e ciency of the rendering algorithm. This thesis rst o ers a conjecture on how to extend light beam tracing to include glossy surface interactions. The glossy bidirectional re ectance distribution function (BRDF) that is required to support the conjecture is then derived and shown to be physically plausible. Following from the conjecture a new extension to light beam tracing that allows glossy surface interactions for more realistic rendering of caustics is formulated. Gauss' divergence theorem is used to replace the irradiance surface integral of the lighting equation with a more e cient boundary line integral. This solution is also shown to be reusable for all-frequency interactions although more work is required to complete the derivations. Finally, multi-bounce glossy light beam tracing is demonstrated which further extends the application domain of glossy light beam tracing. The new rendering algorithm is shown to be a good alternative for rendering single-bounce and multi-bounce caustics due to specular as well as glossy surfaces. The expectation is that the irradiance solution would also in future be useful for more general applications. tm2015 bs2026 Computer Science PhD Unrestricted SDG-09: Industry, innovation and infrastructure 2015-11-25T09:54:08Z 2015-11-25T09:54:08Z 2015/09/01 2015 Thesis Duvenhage, B 2015, Light beam tracing for multi-bounce specular and glossy transport paths, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/50893> S2015 http://hdl.handle.net/2263/50893 en © 2015 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 Light beam tracing Glossy transport paths Multi-bounce specular transport Light transport algorithms Realistic image synthesis Computer-Aided Design (CAD) Engineering, built environment and information technology theses SDG-09 Light beam tracing for multi-bounce specular and glossy transport paths |
| title | Light beam tracing for multi-bounce specular and glossy transport paths |
| title_full | Light beam tracing for multi-bounce specular and glossy transport paths |
| title_fullStr | Light beam tracing for multi-bounce specular and glossy transport paths |
| title_full_unstemmed | Light beam tracing for multi-bounce specular and glossy transport paths |
| title_short | Light beam tracing for multi-bounce specular and glossy transport paths |
| title_sort | light beam tracing for multi bounce specular and glossy transport paths |
| topic | UCTD Light beam tracing Glossy transport paths Multi-bounce specular transport Light transport algorithms Realistic image synthesis Computer-Aided Design (CAD) Engineering, built environment and information technology theses SDG-09 |
| url | http://hdl.handle.net/2263/50893 |