Selective replacement for artifact reduction
US6695435B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2003 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | May 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Selective replacement methods and systems based on a stochastic process use a redundancy inherent, for example, in a four-plus color printing system that has full-width colors. Since the absorption spectra of the four or more colors usually overlap to some extent, there is a redundancy that can be used to reduce artifacts, such as streaks. Since the human visual system is much less sensitive to chrominance changes, than to luminance changes, matching the luminance of a pixel where a color is missing, to the luminance of the original color or to the luminance of the pixels that neighbor that pixel can adequately to reduce the severity of the artifact caused by the missing color while reducing the chance that the replacing process itself introduces any additional artifacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.