Generating and using blue noise dither patterns with high value thresholds positioned for a high dot concentration ratio
US9092720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2014 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Sep 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/101
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a dither pattern generation method so that a dot arrangement having excellent dispersibility can be obtained in low-gradation areas for single colors and for mixed colors. The dither pattern generation method generates dot patterns for low-gradation areas having threshold values 1 to S so that high dispersibility is obtained in a cyan dot pattern and a magenta dot pattern, and so that in a combined dot pattern made by combining these dot patterns there are no overlapping pixels. The dither pattern generation method then sets threshold values for a cyan dither pattern and a magenta dither pattern based on these generated dot patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.