Digital image processing method
US7254278B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2003 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Dec 13, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method of post-processing a digital image (Im) comprising pixels, said digital image being encoded and decoded according to a technique of coding by blocks of pixels. Said method comprises a classification step (6) intended to allocate a class (Cli) to a block (Bj) of pixels of said digital image, a step of evaluating the degradation (5) of said digital image delivering a degradation measurement (DM) of said digital image, a filter selection step (9) intended to associate a filter (F1) with a pair of adjacent blocks (Bj, Bk) according to their respective classes (Clm, Cln) and the degradation measurement (DM) of said digital image, a filtering decision step (8) intended to deliver a filtering decision (Dec) for a pair of adjacent blocks (Bj, Bk) according to the degradation measurement (DM) and a filtering step (11) intended to filter a pair of adjacent blocks (Bj, Bk) by means of its associated filter (F1) delivering a filtered digital image (ImF). The advantage of such a method is that it is both of low complexity and very effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.