High-Quality Pre-Integrated Volume Rendering Using Hardware Accelerated Pixel Shading Klaus Engel, Martin Kraus, Thomas Er Visualization and Interactive Systems Group University of Stuttgart, Germany ggraph/Eurographics Workshop on Graphics Hardware 2
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High-Quality Pre-Integrated Volume Rendering Using Hardware Accelerated Pixel Shading
High-Quality Pre-Integrated Volume Rendering Using Hardware Accelerated Pixel Shading. Klaus Engel, Martin Kraus, Thomas Ertl Visualization and Interactive Systems Group University of Stuttgart, Germany. Siggraph/Eurographics Workshop on Graphics Hardware 2001. - PowerPoint PPT Presentation
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High-Quality Pre-Integrated Volume Rendering Using Hardware Accelerated Pixel
Shading
High-Quality Pre-Integrated Volume Rendering Using Hardware Accelerated Pixel
Shading
Klaus Engel, Martin Kraus, Thomas ErtlVisualization and Interactive Systems GroupUniversity of Stuttgart, Germany
Siggraph/Eurographics Workshop on Graphics Hardware 2001
• render intermediate slices using multi-texture approach(Rezk-Salama,Engel et al., GH2000)
- 3D textures:
• render additional slice polygons
• But:– decreases rendering speed due to additional rasterization
– many additional slices required even for low-resolution volumes
– non-linear transfer functions: not sufficient to sample volume with the Nyquist frequency of scalar data
Volume Classification
voxels
Post-classification
interpolation
interpolation
Pre-classification
classification
transfer functions
classification
Pre-Integrated Volume Rendering• The approach:
– texture-based (2D/3D)– ray-segments computed in a pre-processing step– pre-computed ray-segment lookup (dependent texture)– small number of slices => fast
• Especially suited for:– low resolution volume data– non-linear transfer functions