Block parallel error diffusion method and apparatus
US5519791A · kind A · utility
16Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Jan 4, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to display a continuous tone colour image on a discrete colour level display, methods of halftoning must be used. The high display rate of colour output devices means that serial methods of real time halftoning are difficult to use. A method and apparatus is disclosed for reducing the speed with which a halftoning method must be performed by performing the halftoning of an output image by simultaneously dividing the input image into a number of areas and simultaneously halftoning the areas individually making special provisions for pixels located in the boarder regions of a given area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.