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Processing system for digitizing freehand graphics

  • US 8,091,787 B2
  • Filed: 03/29/2011
  • Issued: 01/10/2012
  • Est. Priority Date: 10/25/1999
  • Status: Expired due to Fees
First Claim
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1. A processing system for digitizing a freehand graphic created by an optically imaging pen, the processing system being configured for:

  • receiving digital ink representing interaction of the pen with a surface having a position-coding pattern printed thereon, said digital ink identifying one or more positions detected by the pen;

    determining if the detected position is in a first area or a second area of the surface;

    if the detected position is in the first area of the surface, then interpreting the position as a point in a freehand graphic; and

    if the detected position is in the second area of the surface, then interpreting the position as a selection of a property for the freehand graphic.

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