Image reading apparatus, image formation apparatus, image reading method, image formation method, program for causing image reading method to be executed, and program for causing image formation method to be executed
US7969622B2 · kind B2 · utility
10Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | May 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/03145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the so-called sky-shot in which reading is performed with a platen cover (32) open, an output signal of a read image is compared with a white reference value generated from a white reference member (40). Only if a value greater than or equal to the white reference value exists in the output signal of the read image, a reading operation to be performed with a light source unit in an image sensor unit (33) turned off during an original (34) reading operation is added to each scan line reading operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.