A method for filtering digital images, and a filtering device

Details A method for filtering digital images, and a filtering device A method for filtering digital images, and a filtering device

H - Electricity

04

N

H04N 7/30 (2006.01) H04N 7/26 (2006.01) H04N 7/68 (2006.01)

Patent

CA 2396941

The invention relates to a method for reducing visual artefacts in a digital image, which is coded by blocks (B1, B2, B3, B4) and then decoded. In the method filtering is performed to reduce visual artefacts due to a boundary (R12, R13, R24, R34) between a current block and an adjacent block (B1, B2, B3, B4). The filtering is performed after the current block (B1, B2, B3, B4) is decoded and there is a boundary available for filtering between the current block and a previously decoded block. Image

L'invention concerne un procédé de réduction d'artéfacts visuels dans une image numérique, codée par blocs (B1, B2, B3, B4) puis décodée. On procède à un filtrage pour réduire les artéfacts visuels résultant d'une limite (R12, R13, R24, R34) entre un bloc courant et un bloc adjacent (B1, B2, B3, B4). Le filtrage intervient après le décodage du bloc courant (B1, B2, B3, B4), et une limite est disponible pour le filtrage entre le bloc courant et un bloc précédemment codé.

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