Performance of a Hybrid DCT SVD Visually Imperceptible Digital Watermarking against Signal Processing Attacks

Abstract

Digital watermarking techniques have been developed to protect the copyright of multimedia objects such as text, audio, video. In this paper, we propose a digital watermarking algorithm with a gray image based on two dimensions discrete cosine transform (DCT) and singular value decomposition (SVD) for robust watermarking of digital images in order to protect digital media copyright. The performance of hybrid watermarking technique has presented, including imperceptibility (such as PSNR, NC) and robustness (such as Filtering, Gaussian noise, Rotation and Salt and Pepper). Experimental results demonstrate that the proposed scheme shows superior performance in the presence of signal processing attracks.