Robust Digital Watermarking using DWT-DCT-SVD

摘要

With the rapid growth of the Internet and the development of digital multimedia technologies, illegal copying, tampering, modifying and copyright protection have become very important issues. Hence, there is strong need of developing the techniques to face all these problems [1, 7]. Digital watermarking emerged as a solution for protecting the multimedia data. In this paper, we propose a method of nonblind transform domain watermarking based on DWT-DCT-SVD. The DCT coefficients of the DWT coefficients are used to embed the watermarking information.The parameters used to test the robustness of the proposed algorithm are the Peak Signal to Noise Ratio (PSNR) and Weighted Peak Signal to Noise Ratio (WPSNR) and correlation coefficient (ρ).Also, Robustness of proposed algorithm is tested for various attacks including salt and pepper noise and Gaussian noise, salt & pepper, sharpened and contrast adjustment. The experimental results show that the proposed method is more robust against different kinds of attacks and the watermarked image has good transparency.