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TWO-DIMENSIONAL CODE HAVING RECTANGULAR REGION PROVIDED WITH SPECIFIC PATTERNS FOR SPECIFICATION OF CELL POSTIONS AND DISTINCTION FROM BACKGROUND

  • US 20090242650A1
  • Filed: 03/16/2009
  • Published: 10/01/2009
  • Est. Priority Date: 03/27/2008
  • Status: Active Grant
First Claim
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1. A two-dimensional code having a rectangular region delineated from a background by a plurality of borders, comprising:

  • a plurality of code blocks each composed of a plurality of cells aggregated together and formed to have i) a specified corner in the rectangular region and ii) the plurality of code blocks arranged in the rectangular region;

    a first specific pattern used to specify the positions of the cells; and

    error-correction code blocks contained in the code blocks, formed to correct an error, and arranged contiguously to part of the borders of the rectangular region, the part of the borders being displaced from the first specific pattern.

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