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Mixed code, and method and apparatus for generating the same

  • US 7,702,162 B2
  • Filed: 11/03/2005
  • Issued: 04/20/2010
  • Est. Priority Date: 11/05/2004
  • Status: Active Grant
First Claim
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1. A computer readable storage medium having embodied thereon a mixed code a mixed code obtained by overlapping first information with second information in a region, the first and second information made using at least one of a character, a number, a sign, and an image, the mixed code comprising:

  • a first code image region storing a first code image obtained by encoding the first information and construction information regarding a second code image, the first code image made using colors, shading, or a combination thereof; and

    a second code image region storing the second code image obtained by encoding the second information, the second code image made using colors, shading, or a combination thereof, the second code image overlapping with the first code image, the colors and shading being distinguished from the colors and shading used in the first code image, using a predetermined threshold.

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