Koninklijke Philips Corporation N.v.

Vincent Ruol

Carolina Miro Sorolla

Sandra Del Corso

Estelle Lesellier

The present invention relates to a method of processing a sequence of digital images, intended to detect, in a dynamical manner, a grid comprising blocking artefacts. Said method comprises the steps of, a) detecting () a current spatial grid (SG(t)) within a portion of the image constituted by a current field (FLD(t)), b) determining () a current reference grid (RG(t)) from a current spatial grid (SG(t)) and a preceding reference grid (RG(t-)) supplied by a memory MEM (), the current reference grid (RG(t)) being subsequently stored temporarily in the memory MEM (), and c) correcting COR () blocking artefacts which are present in the current field (FLD(t)) from the preceding reference grid (RG(t-)) so as to supply a processed field (PPP(t)).

Dynamic detection of blocking artifacts

A method of reducing noise in images formed by uniform regions and textures delimited by edges, comprises a step of filtering these images, a step of detecting edges in these images, a sub-step of re-assigning or no re-assigning each image pixel to an edge or a texture in accordance with the result of a connectivity test, this sub-step taking place at the end of the step of detecting edges and textures and a selection step of eliminating or applying this filtering to each image pixel according to whether this image pixel is associated or not associated with an edge or a texture.

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Paris, France

Vincent Ruol