Name
Abstract | ||
|---|---|---|
Shading is an important feature for the comprehension of volume datasets, but is difficult to implement accurately. Current techniques based on pre-integrated direct volume rendering approximate the volume rendering integral by ignoring non-linear gradient variations between front and back samples, which might result in cumulated shading errors when gradient variations are important and / or when the illumination function features high frequencies. In this paper, we explore a simple approach for pre-integrated volume rendering with non-linear gradient interpolation between front and back samples. We consider that the gradient smoothly varies along a quadratic curve instead of a segment in-between consecutive samples. This not only allows us to compute more accurate shaded pre-integrated look-up tables, but also allows us to more efficiently process shading amplifying effects, based on gradient filtering. An interesting property is that the pre-integration tables we use remain two-dimensional as for usual pre-integrated classification. We conduct experiments using a full hardware approach with the Blinn-Phong illumination model as well as with a non-photorealistic illumination model. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1109/TVCG.2010.187 | Visualization and Computer Graphics, IEEE Transactions |
Keywords | Field | DocType |
gradient methods,interpolation,lighting,rendering (computer graphics),table lookup,Blinn Phong illumination model,gradient filtering,lookup tables,nonlinear gradient interpolation,nonphotorealistic illumination model,preintegrated volume rendering,shading,direct volume rendering,gradient interpolation,pre-integration | Computer vision,Lookup table,Volume rendering,Nonlinear system,Computer graphics (images),Computer science,Interpolation,Filter (signal processing),Theoretical computer science,Quadratic function,Artificial intelligence,Shading | Journal |
Volume | Issue | ISSN |
16 | 6 | 1077-2626 |
Citations | PageRank | References |
3 | 0.40 | 16 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Amel Guetat | 1 | 3 | 0.40 |
| Alexandre Ancel | 2 | 6 | 2.17 |
| Stephane Marchesin | 3 | 3 | 0.40 |
| Jean-michel Dischler | 4 | 386 | 34.69 |