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Fiducial detection system

  • US 7,231,063 B2
  • Filed: 08/09/2002
  • Issued: 06/12/2007
  • Est. Priority Date: 08/09/2002
  • Status: Active Grant
First Claim
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1. A fiducial mark for detection by a camera comprising:

  • a circular outer perimeter; and

    a pattern of contrasting regions on an inside of the outer perimeter that is not symmetrical about a central point of the fiducial mark, and that identifies an identity code.

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