Brightness-variation compensation method and coding/decoding apparatus for moving pictures
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United States of America Patent
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Aug 23, 2005
Grant Date -
Dec 26, 2002
app pub date -
Aug 5, 2002
filing date -
Sep 3, 1996
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Abstract
A moving image brightness variation compensation method for encoding digital moving images for transmission and storage, and for image processing when editing moving images, the moving image brightness variation compensation method comprising a step of compensating for overall brightness variations by correcting a luminance value x of each pixel according to the formula DC·x+DB, wherein DB is a parameter indicating a gain change and DC is a parameter indicating a contrast change, the parameters representing overall luminance changes between a reference image plane and an image plane being processed.
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