System and method for reducing noise from an image
US9111339B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2014 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for reducing noise in an image are provided. Noise is reduced in a luminance channel of the image using a first filtering procedure. Noise is reduced in a chrominance channel of the image using a second filtering procedure. The chrominance channel is decomposed into a plurality of frequency sub-bands, where each frequency sub-band of the plurality of frequency sub-bands represents the chrominance channel at a first resolution. The noise is further reduced in the chrominance channel using a third filtering procedure. The third filtering procedure is applied to each frequency sub-band of the plurality of frequency sub-bands. A lowest frequency sub-band of the plurality of frequency sub-bands is decomposed into a second plurality of frequency sub-bands after the third filtering procedure. Each frequency sub-band of the second plurality of frequency sub-bands represents the chrominance channel at a second resolution that is lower than the first resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.