A semi-fragile watermark scheme based on the logistic chaos sequence and singular value decomposition

Abstract

In this paper a semi-fragile watermark scheme is proposed based on the Logistic chaotic sequence and singular value decomposition (SVD). Chaotic sequence is very sensitive to the initial value and has zero-value of cross-correlation. With these properties of chaotic sequence, the uniqueness of the watermark can be efficiently obtained. Some singular values show robustness under lossy compression and can be adopted as a good carrier of watermark. Hence SVD quantization is also employed in our algorithm. In the proposed approach, algorithm efficiency and the influence on host image quality will be discussed theoretically and experimentally. The experimental results show the high robustness against lossy compression and the place being maliciously tampered can be accurately detected and located on the protected digital images. © 2008 Springer Berlin Heidelberg.