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In this paper, a reversible watermarking algorithm is proposed for 3D mesh models based on prediction-error expansion. Firstly, we predict a vertex position by calculating the centroid of its traversed neighbors. Then the prediction error, i.e. the difference between the predicted and real positions, is expanded for data embedding. So only the vertex coordinates are modified to embed a watermark into...
In this paper, a public-key scheme is proposed to authenticate 3D mesh models. It is well known that digital signature schemes can be used for data authentication by generating a separate signature and appending it to the file. Another way is divide the original data into two parts: the content to be authenticated and the cover content. In the embedding process, the signature of the first part is...
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