DCT and Logistic Map based multiple robust watermarks for medical image
Liu Yao-l · Jisuanji yingyong yanjiu · 2013
With the convenience of medical information storage and transmission brought by the digital medical system,the security of these data has also become an issue to be considered. For the sake of medical image security,this paper proposed a robust watermarking algorithm for medical image authentication and protection. The scheme obtained the visual feature vectors of the medical image using DCT. It scrambled the multiple watermarks by Logistic Map to strengthen their security. By combining the zero-watermarking concept,it could make the watermarks robust to common and geometric attacks. The experiment results show that the proposed algorithm can extract the watermarks effectively with good invisibility and robustness. Moreover,compared with the existing medical watermarking techniques,it can embed much more data with less complexity and provide higher adaptability and practicability.