Image scanning apparatus and method for correcting scanned image
US8654409B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image scanning apparatus includes: an image scanning unit that includes plural light emitting elements and a light receiving portion receiving light emitted from the light emitting elements and reflected on a document and scans an image on the document; a light quantity information acquiring unit that acquires light quantity information on the quantity of light received by the light receiving portion while causing the light emitting elements to irradiate a reference member with light; a correction unit that corrects the scanned image, based on the light quantity information; and an abnormality detecting unit that detects abnormality of the light emitting elements. If the abnormality detecting unit detects the abnormality, the light quantity information acquiring unit acquires new light quantity information while causing the light emitting elements to irradiate the reference member with light and the correction unit corrects the scanned image, based on the new light quantity information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.