System and method for adaptive tile depth filter
US7683901B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2006 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Sep 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An efficient system and method for adaptive tile depth filter (ATDF) is disclosed. The key concept of this system and method is to consider more occlusion conditions in order to achieve a better performance of filter before the conventional Z test process in three dimensional graphics pipeline. Two occlusion criteria, Zmax and Zmin (depth range in a tile), are introduced first for occlusion and non-occlusion fragments in a tile. The points between Zmax and Zmin are in uncertain fragment which may need to go through the later Z test. Moreover, a new technique, coverage mask, can further filter the points in the uncertain fragment to a final uncertain fragment and non-occlusion fragment. Besides, the coverage mask can be used to efficiently decide which tile needs the further sub-tile depth filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.