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Coding pattern comprising tags with X and Y coordinate data divided into respective halves of each tag

  • US 8,320,678 B2
  • Filed: 02/05/2008
  • Issued: 11/27/2012
  • Est. Priority Date: 02/08/2007
  • Status: Expired due to Fees
First Claim
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1. A substrate having a coding pattern disposed on a surface thereof, said coding pattern comprising:

  • a plurality of contiguous tags, each tag comprising x-coordinate data and y-coordinate data, wherein a y-axis is nominally defined as north-south and an x-axis is nominally defined as east-west; and

    a plurality of data elements contained in each tag, said x-coordinate data being represented by a respective set of data elements and said y-coordinate data being represented by a respective set of data elements,wherein;

    said x-coordinate data has two replications within a respective tag, a first replication in a western half of said tag and a second replication in an eastern half of said tag; and

    said y-coordinate data has two replications within a respective tag, a first replication in a northern half of said tag and a second replication in a southern half of said tag,and wherein fragments of said coordinate data are arranged such that any tag-sized portion of said coding pattern is guaranteed to contain said x-coordinate data and said y-coordinate data for a tag irrespective of whether a whole tag is contained in said portion.

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