Device and method for improving scanning quality of image scanner
US6144467A · kind A · utility
17Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04732
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanner having an improved scanning quality is disclosed. Two different color blocks having an interface therebetween are provided on the document platform of the image scanner. The image pickup device passes by the color blocks prior to the document area so that color calibrations and/or error detection can be performed before the scanning operation is performed. By this way, the color data such as the brightness of the obtained image can be compensated, and the deflection rate and/or the amplification error of the image pickup device can be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.