Ellipse Fitting for Multi-Touch Surfaces

  • US 20070139395A1
  • Filed: 02/22/2007
  • Published: 06/21/2007
  • Est. Priority Date: 01/26/1998
  • Status: Active Grant
First Claim
Patent Images

1. A method of processing input from a touch-sensitive surface, the method comprising:

  • receiving at least one proximity image representing a scan of a plurality of electrodes of the touch-sensitive surface;

    segmenting each proximity image into one or more pixel groups that indicate significant proximity, each pixel group representing proximity of a distinguishable hand part or other touch object on or near the touch-sensitive surface; and

    fitting an ellipse to at least one of the pixel groups.

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