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Character pattern normalization method and apparatus for optical character recognition system

  • US 3,967,243 A
  • Filed: 07/05/1974
  • Issued: 06/29/1976
  • Est. Priority Date: 07/09/1973
  • Status: Expired due to Term
First Claim
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1. A method of normalizing a character pattern in the form of electrical signals constituting a quantized representation of a character, comprising the steps of:

  • a. storing the character pattern in both a main memory and an auxiliary memory;

    b. sensing the value of at least one spatial parameter of the character pattern in the main memory; and

    c. normalizing the at least one spatial parameter while transferring the character pattern from the auxiliary memory to the main memory in accordance with the sensed value;

    the at least one spatial parameter including the slant of the character pattern, said main and auxiliary memories comprising rectangular arrays of memory elements corresponding to respective points of the character pattern;

    step (c) comprising, for each respective column of memory elements of the main and auxiliary memories;

    gating electrical signals from memory elements of the auxiliary memory to memory elements of the main memory, said memory elements of the main memory to which the electrical signals are gated being said respective column of memory elements, said memory elements of said auxiliary memory from which the electrical signals are gated being spaced to the left of said respective column of memory elements to normalize leftward slant and being spaced to the right of said respective column of memory elements to normalize rightward slant, a spacing of said memory elements of said auxiliary memory from which the electrical signals are gated progressively increasing from a bottom of said auxiliary memory relative to a top of said auxiliary memory.

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