International Conference on Computer and Knowledge Engineering

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Lossless Watermarking in Encrypted Triangular Mesh Models Based on Optimized Vertex Estimation and Error Histogram Shifting

Authors :

Alireza Ghaemi¹ Habibollah Danyali² Kamran Kazemi³ Zahra Qodrati⁴ Amirhossein Ghaemi⁵ Seyedeh Masoumeh Taji⁶

1- Shiraz University of Technology 2- Shiraz University of Technology 3- Shiraz University of Technology 4- Shiraz University of Technology 5- Shiraz University of Technology 6- Shiraz University of Technology

Keywords :

Reversible Data Hiding،Cryptography

Abstract :

Abstract— In this paper a reversible method is proposed for inserting extra information into the encrypted three-dimensional mesh models. These models can be practical when observing a shape from different angles is important. Three-dimensional models can also be utilized in deep fake and hologram technologies. The proposed method is based on optimized vertex estimation. For this purpose, central vertices are predicted in the hexagons. Then estimation error analysis is carried out to develop sharp error histograms. Finally, the obtained error histograms are shifted to embed the extra information into the encrypted carrier. Different experiments have been carried out to evaluate the performance of the proposed method. Obtained results have been compared with other related schemes and indicate the superiority of the proposed method in comparison with other works.

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