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Method and device for processing and watermarking a set of coefficients representing a digital image

  • US 6,990,213 B2
  • Filed: 01/10/2002
  • Issued: 01/24/2006
  • Est. Priority Date: 01/10/2001
  • Status: Expired due to Fees
First Claim
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1. Method of processing a set of coefficients (Xi,j) representing a digital image (300) with a view to an insertion of at least one item of watermarking information (Wr) in said image, this image being liable to undergo a set of geometric transformations and said coefficients being grouped together in regions (Bi), said method being characterised in that it includes the following steps:

  • determining (E220), amongst at least some of said regions (Bi), a set of so-called acceptable regions, adapted to receive said at least one item of watermarking information (Wr); and

    sequencing (E230), according to at least one predetermined criterion, at least one part of said set of acceptable regions (Bi), in an order which is invariant with respect to at least one of said geometric transformations.

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