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Matching of discrete curves under affine transforms

  • US 7,158,677 B2
  • Filed: 08/20/2002
  • Issued: 01/02/2007
  • Est. Priority Date: 08/20/2002
  • Status: Active Grant
First Claim
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1. A method for determining the presence of an object of interest in a target image, the method comprising:

  • acquiring the target image;

    determining a target image discrete curve from the target image, wherein the target image discrete curve corresponds to a respective object in the target image;

    determining a target curve transform based on the target image discrete curve;

    applying the target curve transform to the target image discrete curve to generate a mapped target image discrete curve;

    performing geometric pattern matching on the mapped target image discrete curve and a mapped template image discrete curve, wherein the mapped template image discrete curve corresponds to the object of interest; and

    generating pattern matching results based on said geometric pattern matching.

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