Removal of block encoding artifacts

Details Removal of block encoding artifacts Removal of block encoding artifacts

2006-02-21

2006-02-21

Patel, Kanjibhai (Department: 2625)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C382S239000, C382S275000, C358S003260, C358S003270

Reexamination Certificate

active

07003174

ABSTRACT:
A method of reducing artifacts in an image previously processed by block transform encoding may comprise the steps of:determining block boundaries;determining an approximate metric of artifact visibility;optionally interpolating across block boundaries;adaptively filtering luminance;optionally adaptively filtering chrominance;adaptively adjusting local saturation variation; andadaptively simulating high spatial frequency image detail;wherein the adaptive steps are executed to an extent or in an amount depending on the metric or standard or measurement of artifact visibility.

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