Stochastic screening method with dot pattern regularity control and dot growth
US7099049B2 · kind B2 · utility
6Cited by
11References
4Claims
0Family size
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Key dates
| Filing date | Aug 13, 2002 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Nov 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stochastic screening mask is provided for rendering halftone images. A filter controlled force masking method is used to vary the mask patterns from regularity to randomness. Dot size (amplitude), dot number (frequency), and dot shape are modulated integrally at each gray level during the generation of the mask. The single pixel limit for blue noise masking is broken down by this approach. The halftone patterns generated with this method can have visually pleasing blue noise attribute. This new screening method would provide flexible solutions for different types of printing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.