Image processing device, image processing method, and storage medium for performing a gradation correction operation in a color space
US8891865B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2009 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | May 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing device (100) includes a gradation correction value acquiring unit (12) that acquires a gradation correction value representing a ratio of a luminance component of an input image and a luminance component of an output image, a chroma analyzing unit (13) that calculates a chroma correction value, in which the total sum of degrees of chroma discrepancy between an analysis image equal to or different from the input image and a corrected image obtained by correcting a luminance component of the analysis image on the basis of one or more gradation correction values is the minimum, in correspondence with the gradation correction value, and an image output unit (14) that outputs as the output image an image obtained by correcting the input image received by the image input unit (11) on the basis of the gradation correction value acquired by the gradation correction value acquiring unit (12) and the chroma correction value correlated with the gradation correction value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.