Name
Abstract | ||
|---|---|---|
Hardware-accelerated direct volume rendering of unstructured volumetric meshes is often based on tetrahedral cell projection, in particular, the Projected Tetrahedra (PT) algorithm and its variants. Unfortunately, even implementations of the most advanced variants of the PT algorithm are very prone to rendering artifacts. In this work, we identify linear interpolation in screen coordinates as a cause for significant rendering artifacts and implement the correct perspective interpolation for the PT algorithm with programmable graphics hardware. We also demonstrate how to use features of modern graphics hardware to improve the accuracy of the coloring of individual tetrahedra and the compositing of the resulting colors, in particular, by employing a logarithmic scale for the pre-integrated color lookup table, using textures with high color resolution, rendering to floating-point color buffers, and alpha dithering. Combined with a correct visibility ordering, these techniques result in the first implementation of the PT algorithm without objectionable rendering artifacts. Apart from the important improvement in rendering quality, our approach also provides a test bed for different implementations of the PT algorithm that allows us to study the particular rendering artifacts introduced by these variants. |
Year | DOI | Venue |
|---|---|---|
2004 | 10.1109/VISUAL.2004.85 | IEEE Visualization 2003 |
Keywords | Field | DocType |
pre-integrated color lookup table,correct perspective interpolation,significant rendering artifact,floating-point color buffer,pt algorithm,hardware-accelerated direct volume rendering,rendering artifacts,high color resolution,correct visibility,particular rendering artifact,objectionable rendering artifact,linear interpolation,hardware accelerator,image texture,dithering,lookup table,computational geometry,mesh generation,data visualisation,volume rendering,floating point,image resolution,interpolation,ray tracing,graphics hardware,test bed | Computer graphics (images),Computer science,Real-time rendering,Volume mesh,Theoretical computer science,Artificial intelligence,Tiled rendering,Computer vision,Volume rendering,3D rendering,Alternate frame rendering,Texture memory,Rendering (computer graphics) | Conference |
ISBN | Citations | PageRank |
0-7803-8788-0 | 18 | 0.88 |
References | Authors | |
12 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Martin Kraus | 1 | 269 | 15.90 |
| Wei Qiao | 2 | 40 | 5.65 |
| David S. Ebert | 3 | 2056 | 232.34 |