Image denoising apparatus and method
US7496240B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2005 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Jan 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to an image de-noising method, an original image is corrected into an intermediate correction image. A differential image is determined between the original image and the intermediate correction image. Each pixel in the differential image has a differential pixel value equal to a difference between the pixel value of the corresponding pixel in the original image and the corrected pixel value of the corresponding pixel in the intermediate correction image. A pixel-dependent conversion parameter is determined at each pixel based on the differential pixel value at the each pixel in the differential image. The original image is corrected into a final correction image by using the pixel-dependent conversion parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.