Image correction apparatus, image correction method, and image correction program
US8295639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2010 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Apr 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image correction apparatus stores therein a plurality of correction curves for determining a correction amount, calculates a feature value of average brightness in an input image, determines whether the calculated feature value is equal to or greater than a first threshold, and, for the input bright image with the feature value equal to or greater than the first threshold, counts the number of pixels equal to or less than a second threshold in the input image. The image correction apparatus calculates a feature value of average brightness from pixel values of the counted pixels, on a basis of whether the calculated feature value is equal to or greater than a third threshold, or, whether the number of pixels equal to or greater than the third threshold is a fourth threshold or more, obtains a correction curve to correct the input image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.