Post RIP image rendering in an electrographic printer to minimize screen frequency sensitivity
US7209244B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2004 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Feb 10, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of printing multiple images with differing line screen frequencies with a printer is print sensitive to differing line screen frequencies, the method comprising the steps of: converting the images into a digital bitmap comprised of an array of pixels wherein each pixel is assigned a digital value representing marking information; defining each pixel as either a background pixel, interior pixel, or an edge pixel; reassigning the digital value of the interior pixels to a fixed interior pixel value; and reassigning the edge pixel values so as to minimize print sensitivity to differing line screen frequencies between images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.