Document reader apparatus
US5149977A · kind A · utility
14Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Feb 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3295
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A document reader (scanner) is disclosed which can automatically provide a provisional decision on the acceptability of the document image quality, and display the documents judged to be unacceptable for visual confirmation, using a display means. The apparatus can detect skewing of documents and anomalous document image contrasts, and the degree of skewing to be detected can be adjusted as required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.