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Method of processing pattern data on the basis of ranked amplitude values, and apparatus for performing the method

  • US 5,319,723 A
  • Filed: 06/12/1991
  • Issued: 06/07/1994
  • Est. Priority Date: 08/07/1989
  • Status: Expired due to Term
First Claim
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1. A method of determining the presence of a predetermined pattern positioned in a spatial field of data points, wherein each data point has a particular amplitude value and wherein a first group of particular amplitude values for a first set of data points at first locations relative to the position of the predetermined pattern in the spatial field are ranked according to their respective amplitude values, and a second group of particular amplitude values for a second set of data points at second locations relative to the position of the predetermined pattern in the spatial field are ranked according to their respective amplitudes values, the method comprising the steps of:

  • a) making a first comparison between a first ranked value from said first group of particular amplitude values and a second ranked value from said second group of particular amplitude values; and

    b) making a second comparison between a selected particular amplitude value of one of said data points and a third ranked value from said first group of particular amplitude values;

    wherein said second comparison verifies the results of said first comparison.

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