Image processing device, image processing method, and record medium
US7180632B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2002 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Mar 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image processing apparatus, a desired image processing is applied to an input signal by using a color correction table which changes an amount of conversion for a white point according to the luminance of white provided from an image output apparatus. It is possible to avoid influence of adaptation of the eye by making chromaticity of a target white point (D=O, (xwt, ywt)) close to chromaticity of white of the image output apparatus (D=1, (xwd, ywd)). Further, the target white point after the conversion is made close to a white point of the image output apparatus as luminance of the white provided from the image output apparatus increases. The reason for this constitution is that the human eye tends to adapt to bright light more than to dark light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.