Maintaining black edge quality in liquid ink printing
US6290330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method of processing color image data for printing on an inkjet printer to maintain edge quality in an image recorded on a receiving medium. The method begins with the receipt of color image data comprising a plurality of color planes that combine to form an array of composite pixels, the color planes including at least one black plane and at least one non-black plane, wherein each color plane comprises an array of separation pixels, each separation pixel having at least two states, a first state corresponding to depositing no ink at an image location and a second state corresponding to depositing ink at an image location. The method then identifies an interface between an black area and a non-printed area; defines an N-pixel wide border within the black area; and modifies the color image data corresponding to the N-pixel wide border to reduce the number of second state separation pixels in a non-black plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.