Multimedia security and 3D video objects

Bennour, Jihane

In all the published 3D watermarking techniques, users are assumed to access the 3D watermarking datafile to extract/detect the mark. Having observed that in many cases the 3D datafile is not accessible at the extractionstep, we propose a completely different approach. It consists in watermarking 3D objects and retrieving the mark from 2D images or videos having used the 3D synthetic object, thus protecting the visual representation of the object. Several tests are proposed for various environments showing the performance and limits of our asymmetric approach. The second part of the thesis introduces a more classic 3D watermarking application in which both insertion and extraction are performed on the 3D object itself. The originality of this 3D watermarking algorithm is the use of the silhouette to embed the mark, and the introduction of the characteristic views notion. We have also used the silhouette to hide additional information related to the 3D model. For this purpose, we proposed a blind polygonal-line watermarking technique that has capacity. The last part of this thesis is devoted to the evaluation of 3D watermarking techniques, an important but often neglected issue

Sécurité numérique
Eurecom Ref:
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