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Digital watermark decoding method

  • US 6,700,990 B1
  • Filed: 09/29/1999
  • Issued: 03/02/2004
  • Est. Priority Date: 11/18/1993
  • Status: Expired due to Fees
First Claim
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1. In an image processing method that includes steganographically decoding an input two-dimensional image to extract a multi-bitcode therein, the image comprising a two-dimensional array of pixels, an improvement comprising:

  • transforming the image into a different domain; and

    pattern matching data related to the transformed image with a reference pattern.

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