Title :
Fast soft shadow visualization for deformable moving light sources using adaptively sampled light field shadow maps
Author :
Jeng, Elvis Ko-Yung ; Xiang, Zhigang
Author_Institution :
Dept. of Comput. Sci., City Univ. of New York, NY, USA
Abstract :
This is a two-stage soft shadow visualization technique for deformable moving area light sources using adaptively sampled light field shadow maps. In the pre-processing stage, we create a slab of shadow maps for the sample points in a light template. To reduce storage costs, our adaptive sampling method stores each map in a quadtree and only stores fine details from those areas that need them. In the dynamic visualization stage, we make use of the shadow maps to efficiently construct/update the shadowed image. Once the scene is processed for the initial lighting setup, a new lighting setup can be computed even more rapidly if most of the light points do not change.
Keywords :
computer animation; data visualisation; light sources; quadtrees; rendering (computer graphics); adaptively sampled light field shadow maps; deformable moving light sources; dynamic visualization; fast soft shadow visualization; light template; lighting setup; quadtree; shadow map slab; shadowed image; storage cost; Computer science; Educational institutions; Layout; Light sources; Optical arrays; Optical attenuators; Rendering (computer graphics); Sampling methods; Slabs; Visualization;
Conference_Titel :
Computer Graphics and Applications, 2002. Proceedings. 10th Pacific Conference on
Print_ISBN :
0-7695-1784-6
DOI :
10.1109/PCCGA.2002.1167887