Image reading device and image forming apparatus performing image correction using color patches on a curved surface
US9544472B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2015 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Jul 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is an image reading device including an irradiation section that irradiates a reading position with light, a color chart that includes plural color patches, and that is provided on a curved surface of a rotatable roller, an image capturing section that captures an image of the color chart at the reading position, and that outputs image signals which express the captured image, a correction section that corrects the image signals using a correction coefficient corresponding to the curved surface, and a calibration section that performs calibration using the image signals, which are corrected by the correction section, and representative color values of the plural color patches, the representative color values being stored in advance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.