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Hiding codes in input data

  • US 7,412,074 B2
  • Filed: 09/27/2006
  • Issued: 08/12/2008
  • Est. Priority Date: 07/31/1992
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • obtaining input data associated with image or visual information;

    selecting portions of the input data to hide a plural-bit code based at least in part on predetermined data that is not used as a reference for the input data; and

    modifying selected portions of the input data to hide the plural-bit code at least in part by changing one or more values of the input data at or around the selected portions.

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