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Golden template comparison for rotated and/or scaled images

  • US 5,850,466 A
  • Filed: 02/22/1995
  • Issued: 12/15/1998
  • Est. Priority Date: 02/22/1995
  • Status: Expired due to Term
First Claim
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1. A method for golden template analysis of a gray-scale test image, the method comprising:

  • acquiring a plurality of sample gray-scale images;

    determining a sub-pixel translation characteristic and at least one geometric characteristic of each of said sample gray-scale images;

    creating a varied plurality of golden template gray-scale images, each golden template gray-scale image being created using a plurality of sample gray-scale images having substantially similar characteristics;

    storing each golden template gray-scale image in a hierarchical multiresolution one-dimensional array in accordance with an index based on the combination of said sub-pixel translation characteristic and said at least one geometric characteristic of said golden template gray-scale image;

    acquiring a test gray-scale image;

    determining a sub-pixel translation characteristic and at least one geometric characteristic of said test gray-scale image;

    using said index to retrieve a golden template gray-scale image having characteristics that are substantially similar to characteristics of said test gray-scale image; and

    comparing said test gray-scale image with said retrieved golden template gray-scale image.

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