Multicolor printing method using rectangular dither matrices of different size, shape, and arrangement of threshold values to minimize overlap of differently colored inks at lower gradations
US4809063A · kind A · utility
33Cited by
15References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1988 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The likelihood that differently colored inks will overlap is minimized in a multicolor printing system employing the dither method by using a different dither matrix for each color and arranging the lowest threshold valued cells of the dither matrices so that they do not overlap when repeated across a printing surface. A preferred embodiment uses rectangular dither matrices of different size, shape, and arrangement of threshold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.