Image processing device and image processing method
US9619873B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2013 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Feb 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing device includes: a calculator that calculates a gray scale histogram for each color component of an image signal; a calculator that calculates, for each color component, a maximum and a minimum of classes having a frequency greater than zero in the gray scale histogram; a determiner that generates, for each color component, a histogram having classes each having an absolute difference value between the frequencies of adjacent classes in the gray scale histogram, and compares the absolute difference values in the histograms with a value to determine, from the presence or absence of an absolute difference value exceeding the value, an image type of the image; a generator that generates a gray scale correction curve from the calculated maximum and minimum for each color component; and a corrector that performs gray scale correction on the image signal using the gray scale correction curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.