Method and image reproduction device for reproducing grey values using a combination of error diffusion and cluster dithering for enhanced resolution and tone
US5818971A · kind A · utility
12Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Nov 27, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/405
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and device for reproducing grey values by reproducing pixels with specific dimensions and degrees of coverage. Use is made of a method based on error diffusion, wherein no clustering of identical pixels is the objective in edge zones while such clustering is the objective outside such zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.