Image forming apparatus and masking coefficient calculation method
US7133154B2 · kind B2 · utility
10Cited by
8References
20Claims
0Family size
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Key dates
| Filing date | Mar 25, 2002 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Nov 13, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus for calculating a masking coefficient is provides, in which the masking coefficient is calculated by using RGB input image signals obtained by reading a document of which spectral characteristics are known by an image reading part and CMYK output image signals optimal for reproducing a color of the document. The masking coefficient can be also calculated by using difference values between CMYK output image signals obtained from actually read RGB signals and optimal CMYK output image signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.