Image processing apparatus and image processing method
US8498016B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2008 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image data can be subjected to a smoothing processing to improve a color reproduction characteristic and an image free from a deteriorated gradation characteristic can be printed. Specifically, the smoothing processing improves the color reproduction characteristic. This smoothing processing may cause a color originally not having the lightness equal to or lower than blacking lightness to be converted to a color having lightness equal to or lower than the blacking lightness. To solve this, such a color is subjected to a gradation adjustment processing to convert the color to the color having the lightness higher than blacking lightness. A gamut mapping does not map such a color on a black point, thus preventing such a color from being broken by the blacking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.