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Fiducial detection system

  • US 20040028258A1
  • Filed: 08/09/2002
  • Published: 02/12/2004
  • 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

    patterns on an inside of the outer perimeter for reading an identity code including higher information density per area than a pattern of concentric rings.

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