Adaptive image reading apparatus and control method of the apparatus
US7476847B2 · kind B2 · utility
1Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Sep 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/484
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention alters the light emission proportion of each of five LEDs for each of a plurality of accumulation cycles in a main scanning direction, in accordance with light emission conditions that are configured in the lighting condition register, causes the emission spectra of the multicolored illumination that composites the light emitted from the five LEDs to approximate three types of color-matching functions that are represented with CIEXYZ or other standard color space, and thus, use a sensor to convert the light that is illuminated by the five LEDs onto an original, and reflected therefrom, into an electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.