A Novel Double 3D Digital Watermarking Scheme

In this paper, a watermarking approach for the 3D models is proposed by embedding double watermarks. It is designed for the sender to check the copyright ownership (robustness) and for the receiver to verify the authentication of the received data (frangibility). The watermark is embedded at one time to possess the robust and fragile attributes by perturbing the distance between the vertices of the model to the center of the model. We keep a balance appropriately between the strength of the watermark signal and the local geometric features of the model. We also introduce a vertex-weighted skill in the watermark extraction process that makes watermark detection more robust against attacks. Experiments show that this approach not only is able to withstand common attacks on 3D models such as polygon mesh simplifications, addition of random noise, model cropping, translation, rotation, scaling as well as a combination of these attacks, but also can detect and locate tampered vertices.