Information
- Publication Type: Journal Paper (without talk)
- Workgroup(s)/Project(s):
- Date: 2001
- Journal: The Visual Computer
- Note: In The Visual Computer, Vol. 17, No. 5, pp. 318-327, Springer, Heidelberg, 2001
Abstract
We present a method that makes the use of photon tracing methods feasible for complex scenes when a totally accurate solution is not essential. This is accomplished by using orientation lightmaps, which average the illumination of complex objects depending on the surface normal. Through this averaging, they considerably reduce the variance of the stochastic solution. In order to use these specialised lightmaps, which consume comparatively small amounts of memory, no changes have to be made to the basic photon-tracing algorithm. Also, they can be freely mixed with normal lightmaps. This gives the user good control over the amount of inaccuracy he introduces by their application. The area computations necessary for their insertion are performed using a stochastic sampling method that performs well for highly complex objects.Additional Files and Images
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@article{Wilkie-2001-Ori, title = "Orientation Lightmaps for Photon Radiosity in Complex Environments", author = "Alexander Wilkie and Robert F. Tobler and Werner Purgathofer", year = "2001", abstract = "We present a method that makes the use of photon tracing methods feasible for complex scenes when a totally accurate solution is not essential. This is accomplished by using orientation lightmaps, which average the illumination of complex objects depending on the surface normal. Through this averaging, they considerably reduce the variance of the stochastic solution. In order to use these specialised lightmaps, which consume comparatively small amounts of memory, no changes have to be made to the basic photon-tracing algorithm. Also, they can be freely mixed with normal lightmaps. This gives the user good control over the amount of inaccuracy he introduces by their application. The area computations necessary for their insertion are performed using a stochastic sampling method that performs well for highly complex objects.", journal = "The Visual Computer", note = "In The Visual Computer, Vol. 17, No. 5, pp. 318-327, Springer, Heidelberg, 2001", URL = "https://www.cg.tuwien.ac.at/research/publications/2001/Wilkie-2001-Ori/", }