Multimedia Security, Volume 1

73D Watermarking

Sébastien BEUGNON¹, Vincent ITIER² and William PUECH¹

¹ LIRMM, Université de Montpellier, CNRS, France

² CRIStAL, University of Lille, CNRS, IMT Lille Douai, France

Three-dimensional (3D) meshes are now widely used in industry across a range of fields, for example, video games, medical diagnosis, computer-aided design (CAD) or, more recently, 3D printing. In this context, data hiding techniques are attractive for hiding and preserving information associated with a mesh or a 3D point cloud. For example, it is possible to add the property rights of the model in an industrial context. In a medical setting, patient information can be added for connecting the patient with their data and the preservation of anonymity. The main advantage of data hiding methods, compared to encryption, is that meshes can be used and visualized. 3D mesh encryption is preferred if visual masking is required. In addition, data hiding methods prevent the sharing of multiple files. In this chapter, we present the challenges of these technologies, as well as the constraints linked to the structure of 3D meshes, in particular its impact on the synchronization step. We draw up a recent development, focused on a variety of different approaches. We then present in detail so-called high-capacity methods that allow the embedding of a significant payload, such as the history of meshes, their metadata or their textures. Finally, we discuss the current situation and future areas of research in the ...