Error clipping for vector error diffusion
US6535635B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1999 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Oct 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An error diffusion technique seeks to remove artifacts resulting from the diffusion of large errors. This technique removes artifacts resulting from instances where there is little difference between a source color and a target color but there is a large diffused error component. The error diffusion technique clips a combination vector resulting from the combination of a source color with the diffused error component so that the combination vector extends roughly one quarter of the width of a color gamut beyond the boundary of the color gamut. This helps to prevent ever-increasing error vectors and, thus, helps prevent certain artifacts in images that are output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.