Method and system for removing artifacts in compressed images
US7139437B2 · kind B2 · utility
10Cited by
10References
48Claims
0Family size
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Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Dec 24, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method for removing artifacts in a digital image that has been decoded from a compressed representation of the image, the pixels of the digital image are segmented into low detail pixels, high detail pixels, and boundary pixels, and then a single non-linear filtering method, such as a sigma filtering method, is applied to each pixel in the digital image. By selecting separate filter parameters for the low detail, high detail, and boundary pixels, the removal of artifacts is improved over prior methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.