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Two-dimensional code detection system and two-dimensional code detection program

  • US 7,648,072 B2
  • Filed: 09/20/2006
  • Issued: 01/19/2010
  • Est. Priority Date: 02/10/2006
  • Status: Expired due to Fees
First Claim
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1. A two-dimensional-code detection system comprising:

  • a reading unit that reads an image including a plurality of two-dimensional codes;

    a recognizing unit that recognizes position detection patterns of the respective two-dimensional codes from the image, which includes the plurality of two-dimensional codes and is read by the reading unit;

    a calculating unit that arbitrarily selects at least three of the position detection patterns of the plurality of two-dimensional codes read by the reading unit before the calculating unit calculates a minimum unit forming each of the selected position detection patterns; and

    a position specifying unit that judges whether or not the minimum units forming the selected at least three position detection patterns are substantially equal to each other, wherein;

    when judging that the minimum units forming the selected at least three position detection patterns are substantially equal to each other, the position specifying unit determines whether or not a combination of the selected at least three position detection patterns form an isosceles right triangle and specifies a region of a two-dimensional code on the basis of the combination of the selected at least three position detection patterns that formed the isosceles right triangle.

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