Chapter 20. GPU-Based Importance Sampling
Mark Colbert University of Central Florida
Jaroslav Křivánek Czech Technical University in Prague
Introduction
High-fidelity real-time visualization of surfaces under high-dynamic-range (HDR) image-based illumination provides an invaluable resource for various computer graphics applications. Material design, lighting design, architectural previsualization, and gaming are just a few such applications. Environment map prefiltering techniques (Kautz et al. 2000)—plus other frequency space solutions using wavelets (Wang et al. 2006) or spherical harmonics (Ramamoorthi and Hanrahan 2002)—provide real-time visualizations. However, their use may be too cumbersome because they require a hefty amount of precomputation ...
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