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Two-dimensional code recognition processing method, two-dimensional code recognition processing apparatus, and storage medium

  • US 20040017945A1
  • Filed: 07/22/2003
  • Published: 01/29/2004
  • Est. Priority Date: 06/30/1998
  • Status: Active Grant
First Claim
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1. A two-dimensional code recognition processing method for recognizing a two-dimensional code made of a plurality of square cells arranged in accordance with predetermined layout rules, the method comprising the steps of:

  • generating binary data from image information acquired externally in accordance with a predetermined threshold value;

    detecting a reference cell serving as a reference in recognizing said two-dimensional code based on said binary data generated in said binary data generating step;

    detecting corner cells each located in a predetermined search range with respect to said reference cell detected in said reference cell detecting step, on the basis of said binary data generated in said binary data generating step; and

    detecting code data assigned to said two-dimensional code existing inside an area of a code part enclosed by said reference cell and by said corner cells on the basis of said binary data generated in said binary data generating step.

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