Image reading apparatus
US5705806A · kind A · utility
11Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading apparatus for reading documents disposed face upward on a document platen by optical scanning. The image reading apparatus comprises a color correction filter which has characteristics for shielding light of visible light range and is inserted into said imaging system on prescanning to detect the height of the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.