The Robust Digital Watermarking Based On Digital Holography And DCT-SVD Transform

Today, the Internet technology is one of the most popular information technology. With the increasing demand of Internet use, digital storage, reproduction and transmission of multimedia information become more and more convenient. However, at the same time, people are enjoying the convenient of multimedia and digital transmission technology, they also need to bear the risks of the convenience. The protection of multimedia productions become harder and harder. As we have seen, the use of the network of openness and sharing of malicious behavior, such as copyright infringement, tampering with information, seriously damage the interests of creators and users of digital works. Therefore, it’s necessary to study new technology to protect the authenticity, integrity and copyright of digital productions, as well as the user’s privacy, intellectual property and property safety.Digital watermark is the data information embedded multimedia media such as image, audio or video file. Robust digital watermark, demands embedding watermark has a strong resistance to attack.To against important information of the watermark attacked, such as cropping attack, lead to watermark information is damaged and cannot be good reconstructed, this paper puts forward the method, based on Arnold scrambling hologram, greatly improve the effect of hologram reconstruction and the robustness of digital watermarking.Holograms have the ability of part reconstruct the whole. DCT transform has good resistance to compression and the noise. SVD transform has a strong ability to resist geometric deformation. Based on the high robustness requirement of the watermark, this paper combines the complementary watermarking processing method, puts forward a digital watermarking method due to digital holography and DCT-SVD transform. A large number of experiments show that this method has strong robustness to various attacks.