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CODING PATTERN COMPRISING DIRECTION CODES

  • US 20090078779A1
  • Filed: 07/24/2008
  • Published: 03/26/2009
  • Est. Priority Date: 09/21/2007
  • Status: Active Grant
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 target elements defining a target grid, said target grid comprising a plurality of cells, wherein neighboring cells share target elements;

    a plurality of data elements contained in each cell; and

    a plurality of tags, each tag being defined by at least one cell, each tag comprising respective tag data encoded by data elements,wherein each cell comprises a plurality of registration symbols encoded by a respective set of said data elements, each registration symbol identifying a respective direction component of an orientation such that said plurality of registration symbols in said cell together identify said orientation, wherein said orientation is an orientation of a layout of said tag data with respect to said target grid.

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