Image reading apparatus, image forming apparatus, light quantity acquisition method and computer readable medium
US8467111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2010 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Sep 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/33314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading apparatus includes: an image reading unit including a light source and a light receiving unit, and being capable of reading an image of a document sheet with predetermined plural reading conditions; a first light quantity information acquiring unit acquiring first light quantity information on a quantity of light emitted from the light source to a first white reference plate and received by the light receiving unit, for each reading condition; a second light quantity information acquiring unit acquiring second light quantity information on a quantity of light emitted from the light source to a second white reference plate and received by the light receiving unit, for fewer reading conditions than all the plural reading conditions; and a third light quantity information acquiring unit acquiring the second light quantity information for reading conditions other than the fewer reading conditions by using the acquired first light quantity information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.