Image scanner with image correction function
US6327056A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanner with an image correction function generates a primary image and an auxiliary image of a document. The image scanner includes an image sensing module, a lens module, a scanning platform, a primary light source and an auxiliary light source. The primary light source illuminates the document from a first optical angle and the auxiliary light source illuminates the document from a second optical angle. During alternate illumination by the primary and auxiliary light sources, the scanner respectively generates two images for each document, one of which is a primary image and the other of which is an auxiliary image. The auxiliary image, which includes information concerning damage to the document, is used to correct the primary image, either transmitting the images to a host for further processing, or by processing the images within the scanner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.