Method for image processing and apparatus for implementing the same
US11483590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2021 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | May 4, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20204
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of method of processing an image includes: determining estimates of parameters of an auto-regressive, AR, parametric model of noise contained in the image, according to which a current noise pixel is computed as a combination of a linear combination of P previous noise pixels in a causal neighborhood of the current noise pixel weighted by respective AR model linear combination parameters (φ1, . . . , φP) with a generated noise sample corresponding to an additive Gaussian noise of AR model variance parameter (σ), generating a noise template of noise pixels based on the estimated AR model parameters, wherein the noise template is of a predetermined pixel size smaller than the pixel size of the image, determining an estimate (σP) of a variance of the noise template, and based on a comparison of the estimated variance (σP) with a predetermined threshold (Tσ), correcting the AR model variance parameter (σ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.