Name
Title | ||
|---|---|---|
Estimating specular roughness and anisotropy from second order spherical gradient illumination |
Abstract | ||
|---|---|---|
This paper presents a novel method for estimating specular roughness and tangent vectors, per surface point, from polarized second order spherical gradient illumination patterns. We demonstrate that for isotropic BRDFs, only three second order spherical gradients are sufficient to robustly estimate spatially varying specular roughness. For anisotropic BRDFs, an additional two measurements yield specular roughness and tangent vectors per surface point. We verify our approach with different illumination configurations which project both discrete and continuous fields of gradient illumination. Our technique provides a direct estimate of the per-pixel specular roughness and thus does not require off-line numerical optimization that is typical for the measure-and-fit approach to classical BRDF modeling. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1111/j.1467-8659.2009.01493.x | Comput. Graph. Forum |
Keywords | Field | DocType |
per-pixel specular roughness,order spherical gradient illumination,tangent vector,gradient illumination,direct estimate,specular roughness,anisotropic brdfs,different illumination configuration,spatially varying specular roughness,surface point,second order | Specular highlight,Bidirectional reflectance distribution function,Computer vision,Isotropy,Anisotropy,Specular reflection,Tangent vector,Artificial intelligence,Surface finish,Mathematics | Journal |
Volume | Issue | ISSN |
28 | 4 | 0167-7055 |
Citations | PageRank | References |
39 | 1.35 | 21 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Abhijeet Ghosh | 1 | 772 | 58.87 |
| Tongbo Chen | 2 | 198 | 11.04 |
| Pieter Peers | 3 | 1109 | 55.34 |
| Cyrus A. Wilson | 4 | 123 | 9.32 |
| Paul Debevec | 5 | 4955 | 449.10 |