Color conversion method
US7453602B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2005 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Dec 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6077
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To obtain suitable reproduction of an image reproduced on an input system on an output system, when a color signal A acquired from an image processing device is contained in a low-saturation area on the color space containing a color signal P of gray for an image output device at a lightness of the color signal A and a color signal O of calorimetrically achromatic color, the color signal A is converted in accordance with a conversion function that converts the color signal on a line segment BP, which connects a color signal B that is the intersection of a line segment AP connecting the color signal A and the color signal P and the outermost contour of the low-saturation area, and the color signal P into a color signal on a line segment BO connecting the color signal B and the color signal O. On the other hand, when the color signal A is not contained in the low-saturation area, the color signal is not converted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.