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Bashford-Rogers, Thomas, Debattista, Kurt and Chalmers, Alan (2014) Importance driven environment map sampling. IEEE Transactions on Visualization and Computer Graphics, 20 (6). pp. 907-918. doi:10.1109/TVCG.2013.258 ISSN 1077-2626.
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WRAP_Bashford-Rogers_0973727-wmg-041213-tvcg.pdf - Accepted Version - Requires a PDF viewer. Download (10Mb) | Preview |
Official URL: http://dx.doi.org/10.1109/TVCG.2013.258
Abstract
In this paper we present an automatic and efficient method for supporting Image Based Lighting (IBL) for bidirectional methods which improves both the sampling of the environment, and the detection and sampling of important regions of the scene, such as windows and doors. These often have a small area proportional to that of the entire scene, so paths which pass through them are generated with a low probability. The method proposed in this paper improves this by taking into account view importance, and modifies the lighting distribution to use light transport information. This also automatically constructs a sampling distribution in locations which are relevant to the camera position, thereby improving sampling. Results are presented when our method is applied to bidirectional rendering techniques, in particular we show results for Bidirectional Path Tracing, Metropolis Light Transport and Progressive Photon Mapping. Efficiency results demonstrate speed up of orders of magnitude (depending on the rendering method used), when compared to other methods.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | N Fine Arts > N Visual arts (General) For photography, see TR Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Lighting -- Computer simulation, Lighting -- Environmental aspects, Lighting, Architectural and decorative, Imaging systems in architecture, Monte Carlo method | ||||||||
| Journal or Publication Title: | IEEE Transactions on Visualization and Computer Graphics | ||||||||
| Publisher: | Institute of Electrical and Electronics Engineers | ||||||||
| ISSN: | 1077-2626 | ||||||||
| Official Date: | 1 June 2014 | ||||||||
| Dates: |
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| Volume: | 20 | ||||||||
| Number: | 6 | ||||||||
| Page Range: | pp. 907-918 | ||||||||
| DOI: | 10.1109/TVCG.2013.258 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 26 December 2015 | ||||||||
| Date of first compliant Open Access: | 26 December 2015 | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
| Grant number: | EP/I038780/1 (EPSRC) |
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