Image reading apparatus for reading a bookform document placed on a document table in face-up state
US6345763B1 · kind B1 · utility
16Cited by
25References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1998 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Dec 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0434
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading apparatus which reads out a document, such as as a book, placed face-up and opened on a document table. The apparatus includes an image reading device for reading out the document image placed on the document table, a mirror for imaging the document upper side plane, a projecting device which projects marks onto the document and mirror, and an image processing unit. A document characterized portion imaged on the mirror is read out by the image reading device and the image processing unit rectifies image distortion of the read out document image based on the characterized portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.