Device for changing screen ruling for image formation in accordance with relationship between luminance and saturation
US8243335B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | May 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/603
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a device that, in printing of controlling the amount of color materials applied, changes a screen ruling for image formation according to the relationship between luminance and saturation. A first component obtains color component data of a plurality of colors so that the total amount of controlled variable in each pixel does not exceed a first limit amount. A second component obtains color component data of a plurality of colors so that the total amount of controlled variable in each pixel does not exceed a second limit amount by performing color conversion processing different from the color conversion processing with the first component. A third component performs pseudo halftone processing by changing a screen ruling to be applied to the color component data of a plurality of colors obtained by the color conversion processing with the second component from chromaticity of color image data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.