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INTERACTIVE INPUT SYSTEM AND METHOD

  • US 20120250936A1
  • Filed: 03/31/2011
  • Published: 10/04/2012
  • Est. Priority Date: 03/31/2011
  • Status: Active Grant
First Claim
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1. A method of determining locations of at least two pointers in a captured image frame, the method comprising:

  • generating a vertical intensity profile (VIP) from the captured image frame, the VIP comprising peaks generally corresponding to the at least two pointers;

    determining if the peaks are closely spaced and, if the peaks are closely spaced;

    fitting a curve to the VIP;

    analyzing the fitted curve to determine peak locations of the fitted curve; and

    registering the peak locations as the pointer locations.

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