Image processing apparatus, imaging apparatus, image processing method, and program
US7821546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2006 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention includes a coordinate rotating circuit which executes a coordinate rotating conversion based on a predetermined rotation matrix, on each of two color difference signals to obtain two color difference rotated signals, a normalizing circuit which divides the color difference rotated signal by a luminance signal to obtain a color difference normalized signal, a subtractor and an absolute value calculating circuit which calculate a color saturation degree-of-deviation signal from a difference between the color difference normalized signal and a coefficient, and a tangent circuit and an absolute value calculating circuit which divide the color difference rotated signal by the color difference rotated signal to calculate a hue degree-of-deviation signal from a resulting quotient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.