×

Method and apparatus for recognizing gestures on a computer system

  • US 5,594,810 A
  • Filed: 06/05/1995
  • Issued: 01/14/1997
  • Est. Priority Date: 09/30/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for recognizing a gesture input on a display screen for a computer system, the method comprising the steps of:

  • (a) processing a stroke entered on a computer screen to smooth said stroke, said stroke including a plurality of points, said processing step including reducing the number of points that define said stroke such that said points of said smoothed stroke are located at least a threshold distance apart from one another, and including the substeps of;

    (i) calculating a position for a new point that is positioned between two adjacent points in the stroke that are separated by less than the threshold distance; and

    (ii) replacing a plurality of points that are separated by less than the threshold distance with said new point, wherein the weight given to the location of a specific new point is proportional to the number of points that are replaced by the specific new point;

    (b) normalizing said smoothed stroke;

    (c) determining whether said normalized stroke matches one of a plurality of gesture prototypes; and

    (d) when at least one gesture prototype matches said normalized stroke, selecting the gesture represented by a best matched gesture prototype as an interpretation of said stroke.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×