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Character recognition apparatus

  • US 4,143,356 A
  • Filed: 10/31/1977
  • Issued: 03/06/1979
  • Est. Priority Date: 10/31/1977
  • Status: Expired due to Term
First Claim
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1. In a character reading system wherein an analog signal having a waveform unique to each character to be read is generated, said unique waveform including a sequence of varying peak amplitudes and times of occurrence of same corresponding to the shape of the character being read, means for evaluating said waveform to derive signals representing feature characteristics of the character recognized compising:

  • a. means for detecting said analog peak amplitudes and the times of occurrence thereof;

    b. first means responsive to said detected analog peak amplitudes to output a first feature signal representing the ratio of one of said analog peak amplitudes to a predetermined one of said analog peak amplitudes;

    c. second means responsive to the detection of the times of occurrence of said analog peak amplitudes to output a second feature signal representing the ratio of the time of occurrence of one of said analog peak amplitudes to the time of occurrence of a predetermined one of said analog peak amplitudes;

    d. means for storing first and second features representing corresponding feature characteristics of a plurality of unique reference characters;

    e. and means for comparing said first and second feature signals with the reference signals of each unique reference character to produce an output indicating the unique reference character corresponding to the unique waveform.

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