Method and apparatus for antialiasing by gamma corrected area calculation
US6606093B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1998 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | May 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2200/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A novel technique and apparatus for antialiasing in a computer graphics system is presented. The invention provides antialiasing by gamma corrected area calculation wherein the pixel coverage area is efficiently determined using cross products of the end points of line edges and the corners of the pixels. Gamma correction is advantageously achieved using linear interpolation of a Bézier curve representation of the gamma correction curve by application of the de Casteljau algorithm to programmable coefficients. The invention further provides for alpha blending of the gamma corrected area calculation for each pixel and adjustment of the area calculation for pixels with end points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.