Image reading apparatus
US6958834B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 11, 2000 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Sep 10, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4076
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading device includes a light irradiation device that moves and scans a document while irradiating the light on the document table, a color CCD sensor which reads the reflecting light of the light from the light irradiating device and photoelectric converts it into plural color signals, and a correction device which executes the shading correction of plural color signals that are photoelectric converted by the color CCD sensor and at the same time, executes the color balance correction and the stray light correction. Further, at the same time with the shading correction executed using white document data comprising R, G, B signals of a white document in color equipment to the shading correction plate that are read and photoelectric converted by the color CCD sensor as desired values for the shading correction, this image reading device executes the color balance correction and the stray light correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.