Document image processing system and document image processing method
US5388167A · kind A · utility
15Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1992 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Mar 12, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A file document image input can have shading removed to produce a deshaded image that is useful for highly efficient compression encoding, to be thereafter stored and transmitted in such efficient encoded form. When the image is retrieved or received, the decoded and deshaded image may have shading returned to it by combining with a shaded template image stored in the template image memory or by synthesizing shading in specified regions. By removing shading from regions, optical character recognition, shading identification or other processing such as smear prevention can be enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.