Vector half-toning with minimum luminance variation dot formation
US7978371B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Sep 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
What is disclosed is a system and method for improving vector halftoning in ink-jet printers capable of dot-on-dot printing. In one embodiment, n input Ci/Mi/Yi channel and a colorant Ki are received. If any of the Ci/Mi/Yi is greater than 100−Ki then that channel is clipped to 100−Ki. Next, a minimum total coverage area of a secondary color RGB dot required to achieve a remaining CMY coverage area is determined. If the minimum total coverage area is non-zero, then the following steps are performed. Each of a primary output Co/Mo/Yo is determined. Each of the primary outputs is then scaled by a ratio of the remaining primary color area over the total remaining toner coverage. The results are sorted and secondary color RoBoGo outputs are determined from the sorted results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.