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Methods and apparatus to count people appearing in an image

  • US 20060062429A1
  • Filed: 12/11/2002
  • Published: 03/23/2006
  • Est. Priority Date: 12/11/2002
  • Status: Active Grant
First Claim
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1. An apparatus to count people in an image comprising:

  • a motion detector to compare at least two images to detect motion occurring between the at least two images to develop a difference image;

    a shape outliner to draw at least one shape based on the difference image; and

    a blob discriminator to determine if the at least one shape represents a person;

    wherein the blob discriminator comprises;

    a center locator to identify a center of the at least one shape;

    a center comparator to add a symbol representative of the center of the at least one shape to a histogram; and

    a threshold counter to count symbols in the histogram exceeding a predetermined threshold as persons.

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