Texture filtering for surface elements
US6509902B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method for filtering shade attributes of surface points of a graphic object onto pixels in an image buffer according to depth values stored in a depth buffer, tangential disks are constructed at positions of each surface point. The tangential disks have increasingly larger radii. Each tangential disk is projected to an ellipse in texture space. View independent filter functions are applied at the position of each surface point to generate texture mipmaps for the surface point. The filter functions have an extent equal to the projected tangential disk. The surface point is projected to the pixels in the depth buffer, and a view dependent filter function is applied to each pixel in the image buffer to determine colors for the pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.