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Hierarchical Rendering Techniques for Real-Time Approximate Illumination on Programmable Graphics Hardware |
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We introduce a GPU-based light hierarchy for real-time approximation of the illumination. We
store information about virtual point lights such as position, direction and
intensity into images. We then build a view-independent light hierarchy into
quadtree image pyramids with a simple and rapid clustering algorithm. We
approximate the illumination with small numbers of clusters (groups of lights)
instead of large numbers of individual lights, using a new tree traversal
algorithm on programmable graphics hardware.
We also present an intelligent sub-sampling method to quickly generate images by exploiting spatial coherence. We make the image pyramids of the current screen buffers, and then we adaptively interpolate low-frequency regions with early-Z culling. We implemented our technique without occlusion, but we obtained visually-good results. We can control the quality–speed tradeoff through several scalar values. Entire steps run on programmable graphics hardware interactively without preprocessing.
Selected Publication:
BibTeX:
@mastersthesis{KiH2007HRT,
author = {Hyunwoo Ki}, title = {Hierarchical rendering techniques for real-time approximate illumination on programmable graphics hardware}, school = {Soongsil University}, year = {2007}, month = {June}, } Related Publication:
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