Chroma-keyed specular texture mapping in a graphics processor
US6054993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/506
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A graphics system includes a graphics controller for rendering polygons with specular highlighting (glare) based on a comparison of texel color values from a texture map to a range of color values. The graphics processor includes range registers for storing the range of color values and color comparators for comparing a texel color value to the range of colors stored in the range registers. The range of color values used in the comparison corresponds to the range of colors of those portions of a texture for which specular highlighting is appropriate, such as metallic surfaces off which light reflects. If a texel color value to be applied to a screen pixel is within the range of colors defined for specular highlighting, the graphics processor adds an appropriate specular component to the texel value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.