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Method and apparatus for detecting motion in MPEG video streams

  • US 7,933,333 B2
  • Filed: 06/30/2005
  • Issued: 04/26/2011
  • Est. Priority Date: 06/30/2004
  • Status: Active Grant
First Claim
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1. A method of detecting an abandoned object in a video image comprising the steps of:

  • connecting an MPEG compliant encoder to a video source that provides video images;

    storing a reference video frame;

    obtaining the current video image frame;

    determining the motion compensation for the current video image frame versus the reference video frame;

    comparing the motion compensation to a threshold value;

    compressing the current video image;

    storing an indication in the compressed video image that an abandoned object has been detected if the motion compensation is greater than the threshold value;

    starting a timer when the motion compensation is greater than the threshold value;

    continuing to increment the timer for each current video frame that has a motion compensation greater than the threshold value;

    resetting the timer if a current video frame has a motion compensation less than the threshold value;

    comparing the timer to a predetermined period of time; and

    indicating that an abandoned object has been detected if the timer is greater than the predetermined period of time.

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