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Object tracking and eye state identification method

  • US 20050232461A1
  • Filed: 04/20/2004
  • Published: 10/20/2005
  • Est. Priority Date: 04/20/2004
  • Status: Active Grant
First Claim
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1. A method of tracking movement of an object between first and second successively generated video images after a position of the object in said first video image has been identified, comprising the steps of:

  • defining a first state vector for the first video image corresponding to the identified position of said object;

    defining a search window in said second video image based on said first state vector;

    bottom hat filtering said search window with a non-flat structuring element to form a filtered image;

    binarizing said filtered image and identifying candidate binary blobs that possibly correspond to said object;

    computing a spatial Euclidian distance between each candidate binary blob and said first state vector, and selecting a candidate binary blob for which the computed spatial Euclidian distance is smallest;

    determining a center of mass of the selected binary blob; and

    defining a second state vector based on said center of mass for identifying the location of said object in said second video image.

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