Soft shadows in dynamic scenes
US7589725B2 · kind B2 · utility
8Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Sep 21, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/60
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present soft shadowing technique pre-computes visibility of blockers using a log of a spherical harmonic visibility function. These logs can then be accumulated and exponentiated in real-time to yield the product visibility vector over all the blockers. The product visibility vector is combined with the light intensity and surface reflectance to determine shading at a receiver point in a computer-generated scene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.