Robust Medical Image Watermarking Scheme Based On RDWT-SVD

Abstract

In the modern era, digital image watermarking is a successful method to protect the multimedia digital data for example copyright protection, content verification, rightful ownership identification, tamper detection etc. In this system, for improving the robustness and security, a Dual watermarking approach using Redundant Discrete Wavelet Transform (RDWT) and block based singular value decomposition (SVD) is presented. After applying RDWT to both cover and watermark images, we apply SVD to the LL sub bands of them. Then modify singular values of the cover image using singular values of the visual watermark. The advantage of the proposed technique is its robustness against most common attacks. In the existing system, the original images is split into the blocks and proceed DFT transform after that by using Arnold scrambling produce. Analysis and experimental results show higher performance of the proposed method in comparison with the DWT-SVD method.