Color balance correction based on color cast attribute
US7702148B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2006 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/628
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus executes color balance correction of an image composed of multiple pixels. The image processing apparatus comprises a representative value calculation unit and a correction processor. The representative value calculation unit calculates, based on signal values of the pixels included in a skin tone area that includes pixels indicating human skin within the image, a representative value representing hue and chroma of the pixels included in the skin tone area. The correction processor executes color balance correction of the image using execution correction amount set based on normal correction amount obtained by multiplying a difference between the representative value and an ideal value designated as a value representing ideal hue and chroma of human skin by a reduction coefficient. The value of the reduction coefficient is set such that the value of the reduction coefficient can vary in response to the representative value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.