Realizes The Processes Of Digital Watermark Dual Loading And Blind Treating

Digital watermark technology, a new kind of information security technology, is becoming more and more popular in digital products' copyright protection field, and it is a whole-new technology of protecting multimedia information security. Many experts and scholars have done profound researches in digital watermark algorithm and have achieved some results. Many new ideas, new algorithms have been put forward. This paper based on practical application of digital watermark suggests a new algorithm which can achieve copyright protection as well as integrity verification.This paper firstly describes the basic concepts, basic principles, system architecture, and other aspects. Then a detailed discussion of the various parts of digital watermark system is shown, based on this, this paper presents a double digital image watermark algorithm based on frequency domain. This new algorithm is in accord with the digital watermark principle in frequency domain, and combined with the advantages of robust watermark and fragile watermark it carries out the embedding and extraction of double watermark from a color image. Furthermore, this new method has the dual function of copyright protection and integrity verification. The algorithm is implemented by MATLAB programming tools, and the experimental results show that it is effective and practical. In the end of this paper, the blind processing method of digital watermark was introduced.