Imaging device and method for implementing a color map with K-only black point while reducing interpolator artifacts
US6169609A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Jun 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color mapping scheme is provided which enables a K-only black point while minimizing interpolator image artifacts. Specifically, a system and method of reducing image artifacts for a color imaging device include implementing a color map so that no C, M or Y color value that is used in defining the black point is produced, except at the black point. The system and method further include implementing a halftone ramp so that: (i) a halftone pattern is selected to provide no rendering for any C, M or Y color value that is used in defining the black point, and (ii) a halftone pattern is selected to provide a full rendering for any K color value that is used in defining the black point. The color map is also implemented so that no C, M or Y color value that is used in defining the black point is obtained as a result of interpolation, except for at the black point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.