The Medical Image Watermarking Using Arnold Scrambling and DFT

Abstract—During network transmission, when an exception occurs(such as forgery, tampering, information confusion), digital medical image, as a diagnostic basis, can not serve as the evidence of medical accident case. And the ROI of medical image is unable to tolerate significant changes. In order to dealing these problems, we have proposed an algorithm that uses Arnold scrambling to preprocess on the original watermarking, improve the security of watermarking, and combing the visual feature vector of image, the encryption technology and the concept of third-party. Moreover, without the sophisticated process to finding the Region of Interest (ROI) of medical images, so, compared with the existing medical watermarking techniques, it can embed much more data, less complexity. The experimental results show that the scheme has strong robustness against common attacks and geometric attacks. Keywords-Arnold scrambling; DFT; Zero-watermarking; Medical image