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Incoming first-shot for non-diffuse global illumination (2000)
| Content Provider | CiteSeerX |
|---|---|
| Author | Szirmay-Kalos, László Sbert, Mateu Martínez, Roel Tobler, Robert |
| Description | This paper presents a method that can replace the small and medium size lightsources by their effect in non-diffuse global illumination algorithms. Incoming first-shot is a generalization of a preprocessing technique called the first-shot that was developed for speeding up global diffuse radiosity algorithms. Alternatively, it can also be approached as a generalization of the direct-lightsource computation involved in gathering type methods. In order to reduce the prohibitive memory requirements of the original first-shot when it is applied to non-diffuse scenes in a direct manner, the proposed new method computes and stores only the incoming radiance generated by the lightsources and the reflected radiance is obtained from the incoming radiance on the fly taking into account the local BRDF. Since the radiance function of the reflection is smoother and flatter than the original lightsource function, this replacement makes the integrand of the rendering equation have significantly smaller variation, which can speed up global illumination algorithms. The paper also discusses how the first-shot technique can be built into a stochastic iteration algorithm using ray-bundles, and provides run-time statistics. Keywords: Non-diffuse global illumination, stochastic iteration, Monte-Carlo quadrature, global methods, finiteelement techniques, first-shot 1 |
| File Format | |
| Language | English |
| Publisher Date | 2000-01-01 |
| Publisher Institution | In Spring Conference on Computer Graphics, Budmerice |
| Access Restriction | Open |
| Subject Keyword | Global Illumination Algorithm Global Diffuse Radiosity Algorithm Direct-lightsource Computation Reflected Radiance Global Method Stochastic Iteration Medium Size Lightsources Prohibitive Memory Requirement Non-diffuse Scene Local Brdf Monte-carlo Quadrature Incoming Radiance Original Lightsource Function New Method Computes First-shot Technique Finiteelement Technique Direct Manner Radiance Function Preprocessing Technique Run-time Statistic Non-diffuse Global Illumination Algorithm Type Method Non-diffuse Global Illumination |
| Content Type | Text |
| Resource Type | Article |
