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Pattern generation method for registering handwriting

  • US 5,040,222 A
  • Filed: 12/14/1989
  • Issued: 08/13/1991
  • Est. Priority Date: 04/03/1989
  • Status: Expired due to Term
First Claim
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1. A pattern generation method in which a time axis is employed for registering a handwritten character with a stroke action, comprising the steps of:

  • multiple inputting of handwritten characters in the form of coordinate and writing pressure three dimensional time series information;

    normalizing the position and size of multiple handwritten character patterns thus input;

    calculating a distortion function for selecting a desired pattern from the multiple input patterns as a reference pattern and obtaining a time distortion function between the reference pattern and other input patterns using dynamic programming matching;

    using the distortion function for time axis correction of the time axis of each input pattern;

    shape averaging the time axis corrected multiple input patterns;

    distortion averaging the multiple distortion functions; and

    time distortion correction of the time axis of the shape averaged patterns, using the distortion function average;

    whereby the registration pattern is obtained from the distortion function derived shape average and time distortion average.

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