Method and system for texture mapping images with anisotropic filtering
US6005582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/60
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for texture mapping an image includes passing an interpolating filter along a line of anisotropy in a texture map and computing a weighted sum of the outputs of the interpolating filter to compute pixel intensity values. The weighting of these output values can be computed using a one dimensional digital filter. The line of anisotropy is derived from the inverse transform, which describes the mapping of a point on the surface of a geometric primitive to a point in the texture map. A system supporting anisotropic filtering includes texture memory, a set-up processor, and a texture filter engine. The set-up processor parses a command stream and retrieves texture data into the texture memory. The texture filter engine determines the line of anisotropy for a pixel and computes a weighted sum of interpolated values sampled along the line of anisotropy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.