Method for ink jet printing a digital image on a paper, the system and apparatus for practicing the method, and products produced by the system and apparatus using the method
US6834934B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Apr 3, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | May 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a method, system, and apparatus of reproducing a digital image on a paper including the steps of the user selecting 8 to 16 inks to form an ink set, calibrating the ink set to create an ink set profile, using the ink set profile to calculate hue-based and/or shade-based look-up tables (LUTs) that directly correlate the inks with the color space coordinates (e.g., RGB values) of the pixels of the digital image. By directly correlating the inks and the color space coordinates using hue and shade, the present method faithfully reproduces the digital image. The method may be practiced using a system and/or apparatus that provides means for performing the calibration of the ink set and direct correlation of the color space coordinates. The printed substrate has a first plurality of dots having 8 to 16 differently colored inks per dot and a second plurality of dots having one color per dot. The 8 to 16 differently colored inks are user-defined and avoid certain conventional art directed ink jet ink-set colors, particularly including gray. Significantly, the method, system, and apparatus produce a printed paper having a high level of detail, depth of color, and broad ran…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.