Image improvement after facsimile reception
US5940190A · kind A · utility
3Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1993 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Aug 23, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/409
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A facsimile printer (1) in which sets of one or two pels contiguous to longer lines of such pels are reduced or eliminated. When reduced the smaller pels are positioned continuous to the longer line and are extended one pel on each side where the longer line exists. This reduces scanner errors and significantly improves images. Gray effects from dithering are not significantly effected when the pels are reduced and spread. When the image is graphic or otherwise more random than text scanned in the line and column direction, the correction may be deactivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.