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Watermarking 3D models

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2 Author(s)
Harte, T. ; Dept. of Comput. Sci., York Univ., UK ; Bors, A.G.

Copyright protection of graphical objects and models is important for protecting author rights in animation, multimedia, computer-aided design (CAD), virtual reality, medical imaging, etc. We suggest a blind watermarking algorithm for 3D models and objects. A string of bits, generated according to a key, is embedded in the geometrical structure of the graphical object by changing the locations of certain vertices. The criterion to choose these vertices ensures a minimal visibility of the distortions in the watermarked object. A bit encoding 1 is associated with positioning a vertex inside a volume modelled by the geometry of its neighbourhood, while a bit encoding 0 positions the vertex outside such a volume. The proposed watermarking algorithm is applied on various 3D models.

Published in:

Image Processing. 2002. Proceedings. 2002 International Conference on  (Volume:3 )

Date of Conference:

24-28 June 2002