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Human and object recognition in digital video

  • US 20060170769A1
  • Filed: 01/31/2006
  • Published: 08/03/2006
  • Est. Priority Date: 01/31/2005
  • Status: Abandoned Application
First Claim
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1. A human and object recognition and tracking video image processing tool comprising the computer implemented steps of:

  • (a) obtaining a stream of color video images in the YUV color space;

    (b) comparing a current video image in the stream to a reference image generated as a background model from past video images in the stream;

    (c) determining a foreground image by using a mask to ignore each current region from the current video image which satisfies any of the following tests in relation to correspondingly positioned regions of the reference image;

    (i) an intensity difference value generated from a neighbourhood of the current region and neighbourhoods of the corresponding region of the reference image is less than a first threshold;

    or (ii) the intensity difference is between the first threshold and a second threshold, a texture difference generated from a shadow filter neighbourhood of the current region and a shadow filter neighbourhood of the corresponding region of the reference image is zero, a color difference generated from a shadow filter neighbourhood of the current region and a shadow filter neighbourhood of the corresponding region of the reference image is less than a color difference threshold, and the current region is darker than the corresponding region of the reference image.

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