Enhanced Watermarking Scheme for 3D Mesh Models
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Abstract
In this paper we present a new non-blind watermarking scheme for 3D graphical o b j e c t s (meshes). Non-blind watermarking scheme is known to be more secure than blind ones, since the original and watermarked models are needed for extraction. In our scheme we use the model's prominent feature points to divide the model into separate segments, these feature segments are then projected from 3D representation to the 3 main 2D-Planes. The watermark embedding is done in frequency domain of these projections. The experimental results showed the robustness of this scheme against various mesh attacks (mesh simplification, subdivision, smoothing, cropping, etc). T his scheme also allows quite large payload to embed. The results of the proposed scheme showed average of 50 percent improvement in robustness against geometry attacks, and up to 70 percent against connectivity attacks.
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