Information Hiding through Variance of the Parametric Orientation Underlying a B-rep Face

  • Csaba Salamon
  • Jonathan Corney
  • James Ritchie
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5284)


Watermarking technologies have been proposed for many different types of digital media. However, to this date, no viable watermarking techniques have yet emerged for the high value B-rep (i.e. Boundary Representation) models used in 3D mechanical CAD systems.

In this paper, the authors propose a new approach (PO-Watermarking) that subtly changes a model’s geometric representation to incorporate a “transparent” signature. This scheme enables software applications to create fragile, or robust watermarks without changing the size of the file, or shape of the CAD model. Also discussed is the amount of information the proposed method could transparently embed into a B-rep model. The results presented demonstrate the embedding and retrieval of text strings and investigate the robustness of the approach after a variety of transformation and modifications have been carried out on the data.


Digital Watermarking Boundary representation (B-rep) Tweaking Parametric orientation Mechanical CAD 


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  1. 1.
    Ohbuchi, R., Masuda, H.: Managing CAD data as a Multimedia Data Type Using Digital Watermarking. In: IFIP TC5 WG5.2 Workshop on Knowledge Intensive CAD to Knowledge Intensive Engineering, Deventer, The Netherlands, pp. 103–116 (2000)Google Scholar
  2. 2.
    Chou, C., Tseng, D.: A public fragile watermarking scheme for 3D model authentication. Computer-Aided Design 2006 38, 1154–1165 (2006)CrossRefGoogle Scholar
  3. 3.
    Ohbuchi, R., Masuda, H., Aono, M.: Watermarking Three-Dimensional Polygonal Models. In: ACM International Multimedia Conference 1997, Seattle, Washington, USA, November 9-13, pp. 261–272 (1997)Google Scholar
  4. 4.
    Ohbuchi, R., Mukaiyama, A., Takahashi, S.: A Frequency-Domain Approach to Watermarking 3D Shapes. Eurographics 2002 21(3), 373–382 (2002)Google Scholar
  5. 5.
    Corsini, M., Barni, M., Bartolini, F., Caldelli, R., Cappellini, V., Piva, A.: Towards 3D watermarking technology. In: IEEE EUROCON 2003 Conference, Ljubljana, Slovenia, September 22-24, pp. 393–396 (2003)Google Scholar
  6. 6.
    Rušinović, Z., Mihajlović, Ž.: Robust Watermarking for 3D Objects. In: MIPRO 2005: Hypermedia and GRID systems, Opatija, Croatia, 30 May-3 June, pp. 271–276 (2005)Google Scholar
  7. 7.
    Benedens, O.: Geometry-Based Watermarking of 3D Models. IEEE Computer Graphics and Applications, 46–55 (January/February 1999)Google Scholar
  8. 8.
    Praun, E., Hoppe, H., Finkelstein, A.: Robust Mesh Watermarking. In: International Conference on Computer Graphics and Interactive Techniques, pp. 49–56 (August 1999)Google Scholar
  9. 9.
    Sonnet, H., Lange, S.: Carrier Objects as Illustration Watermarks for 3D Polygonal Models. In: Simulation und Visualisierung, pp. 305–316 (March 2005)Google Scholar
  10. 10.
    Stroud, I.: Definition of solid modelling operations using uniform set of elementary procedures. In: GML 1992/3 Computer and Automation Institute, Hungarian Academy of Sciences, p. 89 (1992)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Csaba Salamon
    • 1
  • Jonathan Corney
    • 1
  • James Ritchie
    • 2
  1. 1.DMEMUniversity of StrathclydeUK
  2. 2.School of EPSHeriot-Watt UniversityUK

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