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Minutiae recognition system

  • US 3,893,080 A
  • Filed: 06/29/1973
  • Issued: 07/01/1975
  • Est. Priority Date: 06/29/1973
  • Status: Expired due to Term
First Claim
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1. A system for recognizing the merger of two lines in a pattern consisting of lines and spaces between lines comprising:

  • scanniNg means for scanning said pattern and having a scanning output;

    means for converting the output of said scanning means into binary signals representative of the contrast between said lines and said spaces; and

    continuity logic means for forming conductive paths corresponding to the contrast between said lines and spaces including;

    a matrix of logic elements;

    a source of a continuity signal;

    each said logic element in said matrix generating an output signal to the inputs of the logic elements located adjacent and orthogonal thereto in response to the combination of a binary signal from said scanning means and said continuity signal;

    said continuity signal source being directly connected only to the inputs of a first set of logic elements in said matrix;

    whereby said continuity signal source is electrically connected to the inputs of the logic elements outside of said first set only when at least one of said first set of logic elements generates an output signal; and

    means connected to the outputs of a second selected set of logic elements in said matrix and responsive to conductive paths between said continuity signal source and the logic elements in said second set for providing an indication of a merger of two lines.

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