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2008

A single-pass GPU ray casting framework for interactive out-of-core rendering of massive volumetric datasets

12 years 1 months ago
A single-pass GPU ray casting framework for interactive out-of-core rendering of massive volumetric datasets
We present an adaptive out-of-core technique for rendering massive scalar volumes employing single pass GPU raycasting. The method is based on the decomposition of a volumetric dataset into small cubical bricks, which are then organized into an octree structure maintained out-of-core. The octree contains the original data at the leaves, and a filtered representation of children at inner nodes. At runtime an adaptive loader, executing on the CPU, updates a viewand transfer function-dependent working set of bricks maintained on GPU memory by asynchronously fetching data from the out-of-core octree representation. At each frame, a compact indexing structure, which spatially organizes the current working set into an octree hierarchy, is encoded in a small texture. This data structure is then exploited by an efficient stackless raycasting algorithm, which computes the volume rendering integral by visiting non-empty bricks in front-to-back order and adapting sampling density to brick resolut...
Enrico Gobbetti, Fabio Marton, José Antonio
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2008
Where VC
Authors Enrico Gobbetti, Fabio Marton, José Antonio Iglesias Guitián
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