Document reading apparatus having a function of determining effective document region based on a detected data
US5377019A · kind A · utility
43Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Dec 1, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A document reading apparatus which can determine an effective image pickup area containing no object such as operator's hands or fingers pressing a document and rectify image data prior to imaging operation, making use of a difference of the object from the document in chromaticity, luminous density, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.