Shuai Ren
ABSTRACT
The main focus of current information hidding algorithms is to improve the robustness and capacity of the algorithms but there are still certain drawbacks in invisibility. Therefore, an information hiding algorithm based on curvature radius of 3D models is proposed. The first step is to calculate the curvature of every triangle in each 3D model. Then, use a clustering algorithm to group the triangles based on their curvature radius. The second step is to calculate their mean curvature radius. Then, by changing the mean curvature of each group, embed the transformed and optimized secret information. Finally, the vertices of the chosen triangular patch are modified to lessen the influence of the secret information on the 3D model, thereby reducing the distortion of the marked model. The experimental results reveal that, in comparison with VLR and MPS algorithms, the algorithm has increased the mean SNR values by 4.31% and 8.57% respectively and improved invisibility. For robustness, the algorithm’s Corr value increased by 1.13% and 25.53%; 7.54 and 17.67%; 5.19% and 25.68%; 6.08% and 15.11%, when faced with 2% noise attack, 60% mesh simplification, 30% cutting, and 60% compression.
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Index Terms
- An Information Hiding Algorithm of 3D Model Based on Curvature Radius
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