The Encrypted Watermarking Algorithm for Medical Volume Data Based on Arnold Scrambling and 3D-DCT
Jingbing Li, Miao Sui · International Conference on Multimedia Information Networking and Security · 2013
According to the special requirements of the watermarking embedding of the medical volume data, an encrypted watermarking algorithm based on Arnold scrambling and 3D-DCT for medical volume data is presented in this paper. To strengthen the protection of the watermarking information, the original watermarking is preprocessed using the Arnold scrambling. The part of sign sequence from 3D-DCT coefficients is used as the feature vector, which is utilized to enhance the robustness against conventional attacks and geometrical attacks in different levels. Firstly it is described that how to encrypt the watermarking. Then we obtain the feature vector of the medical volume data, and embed and extract the watermarking. The result of our experiment shows that the encrypted watermarking algorithm has strong robustness and security.