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A PATTERN RECOGNITION DEVICE INCLUDING MEANS FOR COMPENSATING FOR REGISTRATION ERRORS

  • US 3,727,183 A
  • Filed: 05/11/1971
  • Issued: 04/10/1973
  • Est. Priority Date: 08/16/1967
  • Status: Expired due to Term
First Claim
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1. A pattern recognition device including:

  • a. means for scanning an input pattern to be recognized to derive therefrom a representation of said input pattern, b. means for generating scanning waveforms for said scanning means, c. storage means conditioned to store representations of a plurality of known patterns, d. means adapted to compare said representation of said input pattern with each of said representations of known patterns to select a known pattern according to a selection criterion, e. means responsive to said representation of said input pattern and the representation of said selected known pattern adapted to derive an error signal which is related to the extent of a rEgistration error between the representation of said input pattern and the representation of said selected known pattern, f. means adapted to modify the scanning waveforms for said scanning means in a sense tending to reduce said error signal, and g. means adapted to control the operation of the device so as to cause the scanning operation effected under the control of the modified scanning waveforms to be followed by further operations of the comparing means, and of the error signal deriving means until a degree of correspondence between the representation of the input pattern and the last selected known pattern is obtained which is greater than a threshold value.

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