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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/7652

Title: A computational approach to simulate subsurface light diffusion in arbitrarily shaped objects
Authors: HABER, Tom
BEKAERT, Philippe
Issue Date: 2005
Publisher: Canadian Human-Computer Communications Society
Citation: Proceedings of Graphics Interface 2005 (GI2005). p. 79-86.
Series/Report: ACM International Conference Proceeding Series, 112
Abstract: To faithfully display objects consisting of translucent materials such as milk, fruit, wax and marble, one needs to take into account subsurface scattering of light. Accurate renderings require expensive simulation of light transport. Alternatively, the widely-used fast dipole approximation [15] cannot deal with internal visibility issues, and has limited applicability (only homogeneous materials). We present a novel algorithm to plausibly reproduce subsurface scattering based on the diffusion approximation. This yields a relatively simple partial differential equation, which we propose to solve numerically using the multigrid method. The main dif culty in this approach consists of accurately representing interactions near the object's surface, for which we employ the embedded boundary discretization [5, 16]. Also, our method allows us to re ne the simulation hierarchically where needed in order to optimize performance and memory usage. The resulting approach is capable of rapidly and accurately computing subsurface scattering in polygonal meshes for both homogeneous and heterogeneous materials. The amount of time spent computing subsurface scattering in a complex object is generally a few minutes.
URI: http://hdl.handle.net/1942/7652
Link to publication: http://portal.acm.org/citation.cfm?id=1089508.1089522&coll=GUIDE&dl=GUIDE&type=series&idx=SERIES10714&part=series&WantType=Proceedings&title=AICPS&CFID=4159153&CFTOKEN=86841728
ISBN: 1-56881-265-5
ISSN: 0713-5424
Category: C1
Type: Proceedings Paper
Validation: vabb, 2015
Appears in Collections: Research publications

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