Image processing apparatus, image processing method, and computer program product
US8363125B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2009 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/69
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a gamma transforming unit that performs gamma transformation on an image signal based on a luminance component of the image signal and so as to maintain an RGB ratio of the image signal; a correction-target-value calculating unit that calculates a correction target value as a target value for performing tone correction on the luminance component of the image signal, based on a structure of RGB components contained in an image signal obtained by the gamma transforming unit through the gamma transformation; and a tone correcting unit that performs tone correction on a value of the image signal based on the luminance component of the image signal and the correction target value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.