Research Of The Digital Geometry Watermarking Techniques

Information hiding is an interdisciplinary subject related with many science fields, such as perception science, information theory, cryptography and other sciences. There are many classification methods of information hiding, such as the scrambling encryption technology and the digital watermarking .Scrambling encryption is a hot topic in three- dimensional grid model transforming a given engineering graph into a chaotic graph to make it difficult for people to find out the true meaning of the chaotic graph.This paper proposes a new method in the Fibonacci transformation's foundation to scramble 3- dimensional grid engineering graph, finally achieves the goal that encrypt and protect a engineering graph. This method has following characteristics: (1) In this paper, the algorithm is scrambling the model apex coordinate, the effect is better. carried out vertex coordinates Scrambling and Scrambling better. (2) The speed of carrying out is quick, and the counting efficiency is high. (3) The method is very easy to realize.The digital watermarking technology is an important branch of information hiding, it is an availability method to realize multimedia copyright protection and information integrality and it is also a research hot spot in information field. However majorities of watermark technology are concentrated in digital image, audio, electronic book, video and other digital production. Less attention has been paid on the research of three-dimensional model watermarking. Actually the copyright protection of three-dimensional model is also vey important problem in the security of multimedia information. Based on Secondary V descriptors a new method of graphic watermarking is presented in this paper. This algorithm has high robustness. It can resist some common manipulations, such as rotation and translation.