Banding artifact detection in digital video content

H - Electricity – 04 – N

Patent

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H04N 7/64 (2006.01)

Patent

CA 2674149

A method and system for identifying and determining banding artifacts in digital video content composed of a sequence of moving video pictures includes creating a mask image (402) corresponding to a picture from said sequence of moving video pictures based on global gradient changes to detect potential areas containing banding artifacts. The values of the mask image are scaled (404) thereby making banding artifact detection possible using gradient operators. The banding artifacts are then identified / detected (406) based on the local gradients.

L'invention concerne un procédé et un système pour identifier et déterminer des artéfacts de répartition en bandes dans un contenu vidéo numérique composé d'une séquence d'images vidéo mobiles, le procédé comprenant la création d'une image de masque (402) correspondant à une image de ladite séquence d'images vidéo mobiles sur la base de changements de gradient global pour détecter des zones potentielles contenant des artéfacts de répartition en bandes. Les valeurs de l'image de masque sont mises à l'échelle (404), rendant ainsi possible une détection d'artéfact de répartition en bandes à l'aide d'opérateurs de gradient. Les artéfacts de répartition en bandes sont ensuite identifiés/détectés (406) sur la base des gradients locaux.

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