Method and system for filtering texture map data for improved image quality in a graphics computer system
US6184893A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Jan 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for filtering texture map data for improved image quality in a graphics computer system. The present invention is directed to a method and system for performing texture map filtering for reducing "flickering" and "sparkling" when rendering a relatively small graphics primitives using a texel map of relatively larger area and low color frequency. A footprint area is defined as the area of texel map space that is mapped into one pixel coordinate of display space. One embodiment of the present invention is particularly useful in texture mapping where the footprint area is larger than one. In this instance, during rendering, the change in texel map coordinates (e.g., du, dv) is large for a unit change in screen coordinates (e.g., dx, dy). When obtaining a texel at location (u, v), the present invention performs a color filtering of texels located at distances du and dv away from the texel at location (u, v). If texel wrap is not allowed, edge pinning is used to obtain the required texels for color filtering. The texels which are rendered in adjacent pixels on the display screen become more colored filtered with respect to each other rather than filtering nearest nei…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.