Picture signal enhancement
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United States of America Patent
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Nov 17, 2009
Grant Date -
Dec 5, 2002
app pub date -
Feb 13, 2001
filing date -
Feb 14, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method of picture signal enhancement, a picture signal is subjected (3, 7) to a histogram-based picture signal modification based on a luminance level distribution over a whole picture or a first part of the picture, and the histogram-based picture signal modification is locally adjusted (5) in dependence on locally measured picture signal properties other than contrast and brightness, the locally measured picture signal relating to second parts of the picture that are each substantially smaller than the whole picture or the first part of the picture, the second parts being within the whole picture or the first part of the picture. Preferably, the second parts are individual pixels.
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