A Novel FDCT-SVD Based Watermarking with Radon Transform for Telemedicine Applications

Abstract

Digital Watermarking has been widely employed for content authentication by securely embedding patient private information within medical images. In this work, we present a novel watermarking, which employs hybridMultiscale/Multiresolution frequency coefficients selection using the Fast Discrete Curvelet Transform (FDCT) inconjunction with Singular Value Decomposition (SVD). In order to add an extra layer of security, the Radon Transform(RT) is applied on the watermarks before embedding for the sake of robustness and security due to RT properties ofcapturing image directionality which is essential against various attacks. The proposed method attained promisingresults and has shown that the imperceptibility of watermarked medical images is higher than 55 dB for all medicalimages. In addition, the scheme has shown an improved robustness compared with existing related work