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Transform domain image watermarking method and system

  • US 20020164048A1
  • Filed: 11/09/2001
  • Published: 11/07/2002
  • Est. Priority Date: 05/12/1998
  • Status: Active Grant
First Claim
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1. A method of robust digital image watermarking for embedding a predetermined bit sequence into a digital image, said digital image comprising spatial domain data signals, said method including the steps of:

  • transforming said digital image into frequency domain data signals including respective magnitude and phase data signal components;

    determining a set of contiguous regions in the frequency domain; and

    embedding said predetermined bit sequence directly into said image frequency domain data signals by mapping bits to well-defined regions in the frequency domain.

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