Three-dimensional Digital Watermarking Algorithm Based On Singular Value Decomposition

Along with the development of the internet, all kinds of information such as text,video,audio and 3D models, are distributed more and more facilitatly and easily. At the same time,some intentionally or unconsciously behaviors such as copy modification and transmit are appeared. So the digital watermarking technique is more and more studied as a method in copyright protection and information safety.Current watermarking technology focuses on media types like still images, and video and audio streams. In contrast, the problem of watermarking 3D models has received less attention from researchers. But, more and more CAD-based 3D data is entering the World Wide Web. Accordingly, companies or copyright owners who present or sell their products in virtual space will face copyright-related problems. Moreover, The presicion of 3D mesh models is more and more higher in 3D animation and 3D games.The work of animation maker must be protected. The watermarks can also solve such problems.In Chapter 1, we first describe the basic concepts of Steganography and digital watermarking, and introduce some basic concepts of digital image watermarking.Then we expound the definition, background, classification and requirements about digital watermarking of 3D models. We propose a general framework of digital watermarking system of 3D models. Then, we analyze the state of art of digital watermarking...