Chromatic noise reduction method and apparatus
US8488031B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jan 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A chromatic noise reduction method is provided for removing chromatic noise from the pixels of a mosaic image. In one implementation, an actual chroma value and a de-noised chroma value are derived for the central pixel of a matrix of pixels. Based at least in part upon these chroma values, a final chroma value is derived for the central pixel. The final chroma value is then used, along with the actual luminance of the central pixel, to derive a final de-noised pixel value for the central pixel. By de-noising the central pixel based on its chroma (which takes into account more than one color) rather than on just the color channel of the central pixel, this method allows the central pixel to be de-noised in a more color-coordinated fashion. As a result, improved chromatic noise reduction is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.