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Reversible Watermarking of NURBS-Based CAD Models

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Information Hiding (IH 2006)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 4437))

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Abstract

We present an algorithm for embedding robust reversible watermarks into CAD models that are represented by a collection of NURBS (Non Uniform Rational B-Spline) surface patches.

Changes to the geometry of the surface representation are introduced by moving one control point per surface patch. This approach provides robustness against converting the model into the mesh representation. The information needed to restore the original control point location is added to the knot vectors of the patch, thus enabling recovery of the original model from the watermarked NURBS representation.

We exploit the properties of the NURBS representation for preserving the continuity between adjacent patches. Continuity is the major criterion of designers for assessing the quality of surface models.

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Authors and Affiliations

  1. Fraunhofer Institute for Computer Graphics Research IGD, Fraunhoferstr. 5, 64283 Darmstadt, Germany

    Wolfgang Funk

Authors
  1. Wolfgang Funk
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Editor information

Jan L. Camenisch Christian S. Collberg Neil F. Johnson Phil Sallee

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© 2007 Springer-Verlag Berlin Heidelberg

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Funk, W. (2007). Reversible Watermarking of NURBS-Based CAD Models. In: Camenisch, J.L., Collberg, C.S., Johnson, N.F., Sallee, P. (eds) Information Hiding. IH 2006. Lecture Notes in Computer Science, vol 4437. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74124-4_12

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  • DOI: https://doi.org/10.1007/978-3-540-74124-4_12

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-74123-7

  • Online ISBN: 978-3-540-74124-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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