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Method and microprocessor for preprocessing handwriting having characters composed of a preponderance of straight line segments

  • US 5,740,273 A
  • Filed: 08/22/1996
  • Issued: 04/14/1998
  • Est. Priority Date: 06/05/1995
  • Status: Expired due to Term
First Claim
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1. A method of preprocessing a handwritten pen input for characters composed of a preponderance of straight line segments, comprising the steps of:

  • A) receiving the handwritten input as a sequence of (x, y) points where x and y are coordinates in a two dimensional coordinate system;

    B) determining a change in angle at each of the points;

    C) identifying potential segmentation points as each of the points having a local maximum of angle change exclusive of any other points and an angle change exceeding a preset threshold;

    D) removing spurious segmentation points to provide useful segmentation points, where spurious segmentation points are each of the potential segmentation points which is less than a preset distance from another of the potential segmentation points; and

    E) determining a sequence of straight line strokes to represent the handwritten input from the useful segmentation points.

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