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Apparatus and method for collating image

  • US 6,707,934 B1
  • Filed: 12/22/1999
  • Issued: 03/16/2004
  • Est. Priority Date: 12/28/1998
  • Status: Expired due to Fees
First Claim
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1. An image collating method for determining identity between a first image and a second image with each other, the method comprising:

  • defining a rectangular reference region in the first image as a template;

    searching for a maximum correlation region in the second image that has a maximum correlation with the rectangular reference region;

    defining rectangular sub-regions located at four corners of the rectangular reference region as sub-templates;

    searching for maximum correlation sub-regions in the second image that have maximum correlations with the rectangular sub-regions in the first image; and

    determining identity between the first and second images based on a difference between a positional relationship between the rectangular sub-regions in the first image and a positional relationship between the maximum correlation sub-regions in the second image.

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