Color conversion device, image forming apparatus, and non-transitory computer readable medium
US10348935B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Mar 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color conversion device includes a receiving unit receiving colorimetric values obtained by measuring plural target-color images of different tones from plural directions; a memory storing a color conversion model associating a combination of colorimetric direction and color material amounts of respective colors and actually measured color values; and a converter converting the colorimetric values into color values including values indicative of amounts of glittering color material and other color materials, wherein the converter calculates, for each target-color image, a weighted average of color differences between colorimetric values of the target-color image in colorimetric directions and color values in the colorimetric directions obtained from the model by using preset weighting coefficients and selects a combination of weighting coefficients that makes tone characteristics closest to tone characteristics of the target-color images by changing the weighting coefficients when a combination of color material amounts minimizing the weighted average is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.