Method and system for enhancing the quality of both color and black and white images produced by ink jet printers
US4930018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Dec 2, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing "grainyness" or color contrast in color imaging systems and simultaneously reducing or eliminating paper cockleing of media printed by ink jet printing. The method involves determining the maximum allowable ink print density necessary to reduce or eliminate paper cockleing in the printed media and then providing tight control of the selection of gray scale ink drop count and associated dye loading in relation to this maximum allowable print density. Using this method, pixels are selected and printed in such a manner as to maximize the uniformity of ink distribution on the printed media. This method will work using either a variable drop size or a fixed drop size with variable dye loadings. It will also work with most error diffusion or dithering schemes presently used and available in the image processing arts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.