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Region encoding using substantially undifferentiated marks

  • US 7,025,276 B2
  • Filed: 11/12/2004
  • Issued: 04/11/2006
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. A region defined in relation to a surface having a plurality of regions, the region including coded data disposed thereon or therein, the coded data being adapted to distinguish the region from each other ones of the plurality of regions, the coded data including a plurality of tags, the coded data being indicative of:

  • a region identity associated with the region; and

    a plurality of reference points within the region; and

    wherein the tags within each region are identical to each other, but are distinct from tags in other ones of the plurality regions.

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