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Device and method to detect dislocation of object image data

  • US 5,793,901 A
  • Filed: 10/02/1995
  • Issued: 08/11/1998
  • Est. Priority Date: 09/30/1994
  • Status: Expired due to Term
First Claim
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1. A method of detecting a dislocation of an object image with respect to a model image, the object image being represented by object image data and the model image being represented by standard image data, the method comprising the steps of:

  • establishing two standard image regions in the standard image data;

    generating a plurality of rotated standard image regions for each of the two standard image regions;

    generating a standard delimiting value based on geometric characteristics of the two standard image regions;

    extracting two object image regions from the object image data corresponding to the two standard image regions and the plurality of rotated standard image regions;

    generating an object delimiting value based on geometric characteristics of the two object image regions;

    comparing the object delimiting value with the standard delimiting value to detect a dislocation of the object image with respect to the standard image.

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