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Conference Paper

Interactive System for Dynamic Scene Lighting using Captured Video Environment Maps

MPS-Authors
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Havran,  Vlastimil
Computer Graphics, MPI for Informatics, Max Planck Society;

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Smyk,  Miloslaw
Computer Graphics, MPI for Informatics, Max Planck Society;

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Krawczyk,  Grzegorz
Computer Graphics, MPI for Informatics, Max Planck Society;

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Myszkowski,  Karol       
Computer Graphics, MPI for Informatics, Max Planck Society;

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Seidel,  Hans-Peter       
Computer Graphics, MPI for Informatics, Max Planck Society;

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Citation

Havran, V., Smyk, M., Krawczyk, G., Myszkowski, K., & Seidel, H.-P. (2005). Interactive System for Dynamic Scene Lighting using Captured Video Environment Maps. In O. Deussen, A. Keller, K. Bala, P. Dutré, D. W. Fellner, & S. N. Spencer (Eds.), Rendering Techniques 2005: Eurographics Symposium on Rendering (pp. 31-42, 311). Aire-la-Ville, Switzerland: Eurographics Association.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-26DB-0
Abstract
We present an interactive system for fully dynamic scene lighting using
captured high dynamic range (HDR) video environment maps. The key component of
our system is an algorithm for efficient decomposition of HDR video environment
map captured over hemisphere into a set of representative directional light
sources, which can be used for the direct lighting computation with shadows
using graphics hardware. The resulting lights exhibit good temporal coherence
and their number can be adaptively changed to keep a constant framerate while
good spatial distribution (stratification) properties are maintained. We can
handle a large number of light sources with shadows using a novel technique
which reduces the cost of BRDF-based shading and visibility computations. We
demonstrate the use of our system in a mixed reality application in which real
and synthetic objects are illuminated by consistent lighting at interactive
framerates.