Document scanner for book document
US5764379A · kind A · utility
25Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1995 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Sep 18, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading apparatus which reads book-like documents placed on a document platen in a face upward condition. A first detector detects the height of the document surface by the shape of a side surface of the document, and a second detector detects the height of the document by the shape of the document surface. A discrimination device detects abnormal height data detected by the detectors, and distortion of image data output from an imaging device is corrected using height data determined to have no abnormality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.