Image brightness controlling apparatus and method thereof
US8731322B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2008 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Apr 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/92
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided are an image brightness control device and an image brightness control method for improving the definition of brightness of the entire image and/or improving the definition of brightness of local areas using local brightness information. The image brightness controlling device includes: a preprocessing unit acquiring an offset table for controlling a dynamic range corresponding to an image range of an input image using brightness values of color data of the input image; and a tone mapping unit mapping the offset table onto the color data. It is possible to improve the definition of brightness so as to correspond to the characteristic of the input image, by automatically considering how to reflect a distribution characteristic of an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.