Method and apparatus for updating background
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
May 31, 2009
filing date -
Jan 5, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Techniques for updating background in a video surveillance system are disclosed. According to one aspect of the present invention, a background frame is obtained before detecting motion. An absolute value of a difference between a pixel of the current frame image and a corresponding pixel of the current background frame is calculated; a probability density of the one pixel of the current frame image is calculated to update the corresponding pixel of the current background frame according to the one pixel of the current frame image, unless the absolute value is larger than a difference threshold and the probability density is less than a probability density threshold.
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