Image reader for processing an image of a document
US5677776A · kind A · utility
42Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reader reads images from above a document platen upon which is placed a document such as a book or the like while using fingers or hands to press both edges of said document so as to prevent the pages of the document from rising upwardly, wherein the image reader determines the position of blank area in accordance with a background luminance, a character frequency of picture element, and position in subscan direction, and erases image data of blank area and its outside image data to erase image data of fingers or hands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.