empty space skipping and occlusion clipping for texture-based volume rendering
DESCRIPTION
Empty Space Skipping and Occlusion Clipping for Texture-Based Volume Rendering. Wei Li, Klaus Mueller, Arie Kaufman Stony Brook University 2003. Highlights. Accelerate texture based rendering by skipping invisible voxels visibility order of partitioned subvolumes using orthogonal BSP tree - PowerPoint PPT PresentationTRANSCRIPT
Empty Space Skipping and Empty Space Skipping and Occlusion Clipping for Occlusion Clipping for Texture-Based Volume Texture-Based Volume
RenderingRendering
Wei Li, Klaus Mueller, Wei Li, Klaus Mueller,
Arie KaufmanArie Kaufman
Stony Brook UniversityStony Brook University
20032003
HighlightsHighlights
Accelerate texture based rendering by Accelerate texture based rendering by skipping invisible voxelsskipping invisible voxels
visibility order of partitioned subvolumes visibility order of partitioned subvolumes using orthogonal BSP treeusing orthogonal BSP tree
empty space skipping providing 2 to 5 empty space skipping providing 2 to 5 times faster renderingtimes faster rendering
empty voxel = transparent voxelempty voxel = transparent voxel occluded voxelsoccluded voxels
SubvolumesSubvolumes
partition volume dataset into partition volume dataset into subvolumessubvolumes
group voxels in similar/close position group voxels in similar/close position and transfer function domain (densities and transfer function domain (densities & gradients) into same sub-volume& gradients) into same sub-volume
subvolumes comprised of invisible subvolumes comprised of invisible voxels are skipped for renderingvoxels are skipped for rendering
organize remaining subvolumes into organize remaining subvolumes into orthogonal BSP treeorthogonal BSP tree
Opacity MapOpacity Map
occluded voxels determined occluded voxels determined using early ray termination using early ray termination with orthogonal opacity with orthogonal opacity mapsmaps
- map orthogonal to the - map orthogonal to the major axis of dataset that's major axis of dataset that's most parallel with view most parallel with view plane, with two axes of map plane, with two axes of map parallel to other two axesparallel to other two axes
ResultsResults