Processing of impulse noise in a video sequence
US11201989B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Jun 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for processing data in a video sequence comprising impulse noise (“salt-and-pepper”, “snow”, or other type), comprising, for filtering the noise, an application of a recursive filter (S2), given by: z(n)=z(n−1)+Δ if y(n)>z(n−1)z(n)=z(n−1)−Δ if y(n)<z(n−1)and z(n)=z(n−1) if y(n)=z(n−1) where: y(n) designates an element in the nth image of the succession, not processed by application of the sign filter; z(n−1) designates an element having a position corresponding to y(n), in the (n−1)th image of the succession, and processed by application of the sign filter; z(n) designates an element having a position corresponding to y(n), in the nth image of the succession, and processed by application of said sign filter, and Δ is a strictly positive coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.