Advanced noise reduction in digital cameras
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United States of America Patent
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Sep 2, 2014
Grant Date -
Dec 29, 2011
app pub date -
Sep 13, 2011
filing date -
May 25, 2007
priority date (Note) -
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Abstract
A noise reduction apparatus for digital cameras is presented that includes groups of one or more connected non-linear filter units. Each of the filter unit groups are driven by decimated input image data at a different level of decimation and the output of at least one of these filter unit groups serves as one of a plurality of inputs to another filter unit group driven at a different decimation level. Filtered image data from one or more filter unit groups is adaptively combined in response to one or more image metrics related to one or more local regional image characteristics.
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