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Real-Time Radiosity: Real-time global illumination of a static scene with dynamic lights using hierarchical radiosity
KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis investigates how to compute the physical correct illumination of a virtual 3d-scene. Global Illumination is simulated, i.e. the light gets reflected multiple times, possible infinite. The goal is to achieve real-time Global Illumination of a static scene with dynamic light sources.

The Radiosity algorithm is investigated and adjusted for real-time. The algorithm is derived in detail to stress its physical correctness. Methods to numerically solve the resulting equation systems are discussed like: gathering, Jacobi and Gauss-Seidel Relaxation. The ability to use information from the previous frame when computing the following is emphasized in the discussion of Gauss-Seidel Relaxation.

Methods of accelerating the algorithm using hierarchies and clusters are explored and Hierarchical Radiosity is implemented for a real-time application. See section 11 for the main results. Face Cluster Radiosity and Vector Irradiance are also discussed. We end by discussing the benefits of using a precalculated inverse solution and various ways of improving the performance.

Place, publisher, year, edition, pages
National Category
Computer Science
URN: urn:nbn:se:kth:diva-63790ISRN: ISRN-KTH/CSC/E--09/003--SEOAI: diva2:482587
Available from: 2013-12-13 Created: 2012-01-24 Last updated: 2013-12-13Bibliographically approved

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