Image processor
US7570288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2006 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Jun 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel signal of Bayer pattern output from an imaging device is subjected to interpolation in a pixel interpolation circuit, and converted into a YCbCr signal in a color space conversion circuit. A chroma value calculation circuit calculates a chroma value based on the pixel signal output from the imaging device. A look-up table converts the chroma value into a suppression signal. More specifically, when the chroma value is lower than a threshold value, the look-up table outputs a value lower than 1 as the suppression signal. The suppression signal is corrected in another look-up table, and then, works on Cr and Cb signals in multipliers. A signal in a low-chroma region is thereby suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.