Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering)

Abstract : Providing robust image watermarking scheme for attending multimedia security stills a challenge nowadays. Numerous methods have been proposed, employing diverse algorithms to enhance the secure transmission and reception of multimedia. This paper introduces a method to embed a watermark image into the host image by applying Discrete Cosine Transform (DCT) and Discrete Fourier Transform (DFT). DCT is employed to identify suitable frequencies for seamless embedding, while DFT is utilized to capture the magnitude and phase characteristics of the host image. To enhance security levels, Ikeda maps are integrated into the scheme. Additionally, Arnold's maps and Singular Value Decomposition (SVD) are applied to identify optimal points that minimize any degradation of the host image quality. The results obtained from evaluating the proposed system using Peak Signal to Noise Ratio (PSNR) values indicate the strength of the system in terms of watermark robustness and the difficulty for an attacker to discriminate or perceive the presence of the watermark. These findings highlight the effectiveness and reliability of the proposed system is more described in the rest of the paper.