Research On Technique Of Anti-Attack Of Image Watermark

With the popularization of Internet and the development of multimedia technique, the digital media has become a faster and more convenient way for information communication. But at the same time, this also leads to serious problem regarding IPR protection. Digital watermark is a Potential technology which can solve the problem of multimedia copyright protection. One of the main parts of digital watermark research is about algorithm research. Usually, the watermarking algorithm contains the process of embedding and watermarking detection, including space domain and transform domain. Normally the general watermarking methods on transform domain become more and more popular, due to its good robustness, it has been more and more used.This paper introduces the current situation of the digital watermark and vision of future and generally expound the essential feature about digital watermark. Aimed at the problem of anti-attack of digital watermark, this paper puts forward a new algorithm based on image scrambling and single-value decomposition(SVD) of matrix. In this algorithm, the first step is to encrypt source image and watermark image by image scrambling technology. Then decompose the new source image in single-value by quantifying, and the watermark information is embedded into the diagonal matrix.The experiment shows that the algorithm is very robust to traditional image processing such as compression, filtering, and also has good immunity to intentional attack such as rotation, cutting etc.