Image denoising method and image denoising apparatus
US9558537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | May 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.