Title :
Interactive Isosurface Ray Tracing of Large Octree Volumes
Author :
Knoll, Aaron ; Wald, Ingo ; Parker, Steven ; Hansen, Charles
Author_Institution :
Sci. Comput. & Imaging Inst., Utah Univ., Salt Lake City, UT
Abstract :
We present a technique for ray tracing isosurfaces of large compressed structured volumes. Data is first converted into a lossless-compression octree representation that occupies a fraction of the original memory footprint. An isosurface is then dynamically rendered by tracing rays through a min/max hierarchy inside interior octree nodes. By embedding the acceleration tree and scalar data in a single structure and employing optimized octree hash schemes, we achieve competitive frame rates on common multicore architectures, and render large time-variant data that could not otherwise be accommodated
Keywords :
data compression; octrees; ray tracing; rendering (computer graphics); storage management; compressed structured volumes; interactive isosurface ray tracing; isosurface rendering; lossless-compression octree representation; memory footprint; min-max hierarchy; optimized octree hash schemes; time-variant data; Acceleration; Data mining; Data structures; Fires; Geometry; Isosurfaces; Layout; Ray tracing; Rendering (computer graphics); Scientific computing; compression; isosurface; octree; ray tracing; volume;
Conference_Titel :
Interactive Ray Tracing 2006, IEEE Symposium on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
1-4244-0693-5
DOI :
10.1109/RT.2006.280222