Method for reducing blocking artifacts in images
US8942467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/99
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Blocking artifacts are reduced by projecting each patch obtained from an input image onto a set of bases vectors to determine multiple representations for each patch. The set of bases vectors are learned from a training image, and the bases vectors include a full basis vector, and one or two subspace bases vectors. An optimal basis vector is determined in the set of bases vectors for each patch according to the projection. A threshold is applied to coefficients of the optimal basis vector to determine a filtered representation for each patch, and a reconstructed patch is generated using the filtered representation. Then, the aggregating the reconstructed patches are aggregated to produce an output image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.