Temporal video filtering
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United States of America Patent
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Nov 13, 2012
Grant Date -
Jun 21, 2007
app pub date -
Dec 15, 2006
filing date -
Dec 16, 2005
priority date (Note) -
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Abstract
In various embodiments, temporal filtering may be used to reduce noise over time in a series of video frames. A temporal filter may use previous filtered frames to reduce the noise in a current frame. For example, a temporal filter may filter noise in still parts of an image more strongly than in moving parts of the image. In some embodiments, a temporal filter requiring less processing power may include a method for detecting motion between a set of pixels and applying the temporal filter based on the detected motion. For example, if substantial motion is not detected, the temporal filter for the block of pixels may be stronger (i.e., reduce more noise) than the temporal filter applied to a block of pixels for which substantial motion has been detected.
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