Image processing system and computer-readable recording medium for recording image processing program
US8463034B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 14, 2009 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Aug 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2101/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tone conversion unit, when performing tone conversion on an image signal, performs the tone conversion so as to provide a more appropriate tone to a feature area such as a face extracted from the image signal. Specifically, a correction coefficient calculation unit performs multi-resolution decomposition on a specific signal with the extracted feature area, and sets all pixels of low-frequency component to 1, while setting high-frequency components considered to include noise to 0, so as to calculate a correction coefficient. Then, a correction coefficient processing unit performs a processing of multiplying the correction coefficient to the image signal similarly performed with multi-resolution decomposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.