Image correction apparatus and image correction method
US8369648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2010 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/92
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image correction apparatus calculates a feature value indicative of an average brightness of an input image from the pixel values of the input image and determines a pixel value at a boundary for correcting each pixel of the input image to make it brighter or darker by using the calculated feature value of the input image. The image correction apparatus calculates, with respect to the pixel value of each pixel of the input image, an area for determining a contrast correction amount for a pixel value smaller than the pixel value at the determined boundary such that a pixel is to be made darker and calculates an area for determining a contrast correction amount for a pixel value larger than the pixel value at the determined boundary such that a pixel is to be made brighter, thereby correcting the contrast of the input image by using the calculated areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.