Robust watermarking of 3D mesh models

A robust watermarking algorithm for the 3D mesh models is proposed. The algorithm is based on the watermarking of images from a virtual 3D scanner, which mimics the operation of 3D scanner in the real world. The position of the object in the scanner is determined by the principle component analysis of the vertex points. After obtaining 2D range image from the virtual scanner, we embed the watermark using the conventional 2D image watermarking method based on the DCT. Then, the vertices of the model are moved according to the range values modified by the 2D watermark. For the watermark extraction, the virtual ranging is performed and then the retrieval process of 2D image watermarking is performed. Experimental results show that the proposed algorithm is robust against the attacks such as mesh simplification and Gaussian noise.

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