Digital halftoning with correlated minimum visual modulation patterns
US5214517A · kind A · utility
39Cited by
23References
4Claims
0Family size
Assignee
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Key dates
| Filing date | May 29, 1990 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | May 29, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital halftone image is produced by providing a binary bit image pattern having a minimum visual noise for each density level in the image, and the binary bit patterns being correlated in a manner that reduces visual noise resulting from transitions between patterns. The patterns are addressed by pixel density and x,y location to produce a halftone image. The patterns are generated by employing a stochastic minimization technique with a constraint to insure correlation between patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.