DFT based multiple watermarks for medical image robust to common and geometrical attacks

This paper presents a method for robust watermarking of medical image using DFT. A feature vector of the medical image is utilized to enhance the robustness against rotation, scaling, and translation. The proposed algorithm utilizes the medical image´s feature, Hash function, the third party authentication. We describe how to obtain the feature vector of medical image and embed and extract the watermarking. Simulation results demonstrate the proposed algorithm´s robustness against common and geometrical attacks.