Image scanner system and method for improved microfilm image quality
US5617223A · kind A · utility
9Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Jun 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4074
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a digital image scanning system and method, a sample of tone values from the image is used to estimate the exposure or central tendency of the recorded image. The estimate is then used to select a tone correction function used to process the image prior to printing, transmission, or CRT display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.