A Robust Watermarking Scheme for 3D Polygon Mesh Models Using Mean Curvature

Abstract

With growing advancement in digital technology, multimedia technology advanced so rapidly. Now images and videos are used in 3D form for architecture, computer games, medical diagnosis and maps. In our proposed algorithm, 3D mesh models are watermarked on the basis of vertex curvature for showing robustness and imperceptibility on mesh models. On the basis of curvature value of each vertex, the object mesh model is partitioned into two bins. One part consists all the vertices which has convex curvature, and other part contains the rest of the vertices. Vertices are modified in such a way that the watermarked mesh model cannot be distinguished from the original mesh model. With human visualization the watermark mesh model is imperceptible. Watermarked mesh models show better results on resistivity over attacks as like smoothing attack, subdivision attack, noise attack and cropping attack. abstract environment.