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Authors: Pavlos Mavridis and Georgios Papaioannou

Affiliation: Athens University of Economics & Business, Greece

ISBN: 978-989-8425-45-4

Keyword(s): Real-Time Diffuse Global Illumination, Spherical Harmonics, Voxelization, Ray Marching.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Lighting and Appearance ; Real-Time Rendering ; Rendering

Abstract: This paper introduces the concept of imperfect volumes, a fast one-pass point-based voxelization algorithm, and presents its applications to the global illumination problem. As often noted, diffuse indirect illumination has the characteristics of a low frequency function, consisting of smooth gradations. We exploit this by performing the indirect lighting computations on a rough approximation of the scene, the imperfect volume. The scene is converted on the fly to a dense point cloud, and each point is directly rendered to a volume texture, marking the corresponding voxel as occupied. A framebuffer reprojection scheme ensures that voxels visible to the main camera will get more points. Ray-marching is then used to compute the ambient occlusion or the indirect illumination of each voxel, and the results are stored using spherical harmonics. We demonstrate that the errors introduced by the imperfections in the volume are small and that our method maintains a high frame rate on scenes wi th high geometric complexity. (More)

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Paper citation in several formats:
Mavridis, P. and Papaioannou, G. (2011). GLOBAL ILLUMINATION USING IMPERFECT VOLUMES.In Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2011) ISBN 978-989-8425-45-4, pages 160-165. DOI: 10.5220/0003318601600165

@conference{grapp11,
author={Pavlos Mavridis. and Georgios Papaioannou.},
title={GLOBAL ILLUMINATION USING IMPERFECT VOLUMES},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2011)},
year={2011},
pages={160-165},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003318601600165},
isbn={978-989-8425-45-4},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2011)
TI - GLOBAL ILLUMINATION USING IMPERFECT VOLUMES
SN - 978-989-8425-45-4
AU - Mavridis, P.
AU - Papaioannou, G.
PY - 2011
SP - 160
EP - 165
DO - 10.5220/0003318601600165

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