METHOD AND APPARATUS FOR ESTIMATING IMAGE NOISE
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Apr 2, 2014
filing date -
Dec 31, 2013
priority date (Note) -
Abandoned
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Abstract
In a method for estimating image noise, plural sample blocks of an image are determined; a mean of at least one color component of each of the sample blocks and a standard deviation of at least one color component of each of the sample blocks are calculated; the sample blocks are distributed into plural segments according to the means of the sample blocks; a weighted average of the standard deviations of all of the sample blocks of each of the segments is calculated according to at least one threshold value that is determined according to the minimum standard deviation among the standard deviations of all of the sample blocks of the segment. The weighted average may be applied to noise reduction, edge detection, or motion detection of the image.
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