Reproduction of colored images
US4879594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Sep 23, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reproducing a colored original image represented by first signals defining the color content of pixels of the original image in terms of a first set of color components. The colored original image is reproduced using at least two separations representing respective color components of a second set which is different from the first set. The color components of the second set are ranked in order of similarity to each pixel and a value is selected for the highest ranked color component for which each of the first set of color component values defining said selected color component does not exceed the corresponding pixel values. The pixel values are then adjusted to take account of the select value of the color component of the second set. The process is then repeated for each of the remaining color components of the second set in the order of ranking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.