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Digitally watermarking paper and objects with stamps and related digitally watermarked stamper

  • US 20040037448A1
  • Filed: 06/02/2003
  • Published: 02/26/2004
  • Est. Priority Date: 06/20/2002
  • Status: Abandoned Application
First Claim
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1. A method comprising the steps of:

  • providing a digital watermark signal;

    thresholding the digital watermark signal to yield a set of points, wherein the set of points is machine-readable;

    embedding the thresholded digital watermark signal in a 1-bit per pixel pattern; and

    patterning a stamper stamp surface after the embedded digital watermarked 1-bit per pixel pattern.

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