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CODING PATTERN COMPRISING NON-REPLICATED COORDINATE DATA SYMBOLS

  • US 20110180614A1
  • Filed: 01/27/2010
  • Published: 07/28/2011
  • Est. Priority Date: 01/27/2010
  • Status: Abandoned Application
First Claim
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1. A substrate having a coding pattern disposed thereon or therein, said coding pattern comprising a plurality of square tags of length l identifying two-dimensional location coordinates, each tag comprising:

  • a plurality n1 of x-coordinate data symbols encoding a respective (n2, k) Reed-Solomon code for an x-coordinate;

    a plurality n1 of y-coordinate data symbols encoding a respective (n2, k) Reed-Solomon code for a y-coordinate;

    a number z of said x-coordinate data symbols positioned in a central column of width q in each tag with a remaining (n1

    z) x-coordinate data symbols distributed evenly on either side of said central column; and

    a number z of said y-coordinate data symbols positioned in a central row of said tag of width q with a remaining (n1

    z) y-coordinate data symbols distributed evenly above and below said central row;

    wherein n1

    n2 and z≧

    1, such that any square portion of said coding pattern of length (l+q) is guaranteed to contain at least (n1+z)/2 data symbols from each of said Reed-Solomon codes.

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