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Candidate article recognition with assignation of reference points and respective relative weights

  • US 5,093,867 A
  • Filed: 08/20/1990
  • Issued: 03/03/1992
  • Est. Priority Date: 07/22/1987
  • Status: Expired due to Term
First Claim
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1. Image recognition apparatus for recognizing a condition of a candidate article with respect to a reference condition, said apparatus comprising:

  • first memory means for storing a bi-level reference image;

    display means connected to said first memory means for displaying said reference image;

    selecting means connected to said first memory means and said display means for manually designating a plurality of selected reference points of said reference image;

    detecting means that has at least one adjustable parameter and is connected to said selecting means for detecting signal levels at each of said reference points;

    second memory means connected to said detecting means for storing said detected signal levels; and

    comparison means connected to said second memory means for making a comparison of said detected signal levels with bi-level signals at points that correspond to said reference points but are proper to a bi-level candidate image corresponding to a candidate article;

    said comparison indicating a condition of said candidate article with respect to a corresponding condition of said reference image, and said display means displaying the results of said comparison;

    wherein each of said points correspond to a plurality of picture elements and said detecting means comprises means for adjustably assigning relative weights to said picture elements.

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