Selective enhancement of black
US6742870B2 · kind B2 · utility
0Cited by
2References
41Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Dec 21, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0158
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printing technique wherein pixel locations that are requested to be marked with only black are identified, black is applied to the identified pixel locations, and non-black color is applied to a subset of the identified pixel locations that correspond to on-pixels of a reference pattern of non-black color pixels having an on-pixel population of at least 20 percent and a toner transfer efficiency of less than about 20 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.