Noise reduction method and unit for an image frame
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United States of America Patent
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Dec 25, 2012
Grant Date -
Apr 15, 2010
app pub date -
Mar 20, 2008
filing date -
Mar 31, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and unit for noise reduction in a current image frame, wherein the current image frame is a part of a sequence of image frames. The method compares a current pixel value of a pixel within the current image frame with a corresponding pixel value of the pixel in at least one adjacent image frame, and determines a piled-up value of the current pixel value and the corresponding pixel value if a pixel difference between the current pixel value and the corresponding pixel value is below a pixel threshold, wherein the pixel threshold depends on the corresponding pixel value and/or the current pixel value. The method and unit can be applied for block and color processing as well.
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