×

Optical word recognition by examination of word shape

  • US 5,557,689 A
  • Filed: 06/01/1995
  • Issued: 09/17/1996
  • Est. Priority Date: 11/19/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of recognizing a string of symbols in data defining an image, comprising the steps of:

  • a) detecting in a set of image signals representing an image, a discrete symbol string in an image wherein symbols strings are made up of a plurality of discrete symbols, and image data representing a symbol string in the image data distinguishes symbol-to-symbol spacing from symbol string-to-symbol string spacing;

    b) representing the image data of one such symbol string as at least one, one-dimensional signal, said step of representing image data of one such symbol string including the substeps of;

    identifying a reference with respect to which a shape signal will be derived for the symbol string;

    deriving a set of measurements from the reference with respect to the image data forming the symbol string representing the set of measurements as a curve; and

    for a selected portion of the curve, representing that portion as a one dimensional signal f(t) derived with respect to the reference; and

    c) comparing said representative signal of the symbol string with a representative signal of a second symbol string.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×