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Method of generating a two-dimensional code with a constant background pattern

  • US 7,310,157 B2
  • Filed: 10/18/2004
  • Issued: 12/18/2007
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Fees
First Claim
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1. A method of generating a two-dimensional code that comprises the steps of:

  • allocating a number of background entries on a carrier for a constant background pattern detectable by a reader;

    printing background dots on the carrier to define the background pattern so that the background pattern includes an orientation component, detectable by a reader and having an asymmetric shape so as to indicate an orientation of the carrier;

    allocating a number of data entries on the carrier for a data area in which data represented by the two-dimensional code is carried; and

    printing an array of data dots, detectable by the reader, in the data area to represent said data.

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