Research On Copyright Protection Of Digital Products Based On Robust Digital Watermarking Technology

As a new information security technique, digital watermarking provides a new solution for the security protection of multimedia information. It has become a hot study in the field of information security, and has been deeply and widely studied. But there are many questions need to be solved. The paper aimed at the digital image and had a study of the Robust digital techniques of the PRM protection. The paper mainly included.1. Self-adpating double-dimension meaning Robust algorithm was put forward. Aiming at the problems of bad application of original picture and security, watermarking signal was embedded based on Human Visual System, which realized the blind scavenge. Meanwhile watermark signals were processed by adopting image compacting technology, which resolved the problems like the large amount of meaningful watermarking embedding. In addition, watermarking information was modulated by the techniques as chaos bi-value sequence, in order to enhance the transparency and robustness of watermarking system. The results of the experiment showed that the algorithm had good transparency and robustness.2. Robust algorithm was put forward based on image feature region. Adopting the identification and marking of feature objects, watermarking signals were superposed on the part that people are interested in, which are the feature objects in carrier images. Compared to the existing watermarking algorithm, the algorithm was more robust and anti-clipping. Based on HVS contrast sensitivity threshold, the watermarking is more imperceptible.3. Robust watermarking algorithm based on wavelet decomposition was stated. Based on Human Visual System, image fusion technique was embedded in image watermarking information in the low frequency part, while in high frequency part, the deviation degree of high frequency coefficient and zero is modified to embedding watermarking. Through that, low frequency and high frequency watermarking features could be complemented, which could enhance the security of watermarking.4. A digital copyright management scheme based on Robust watermarking was designed. With the combination DRM system, a structure of digital copyright management system was put forward, in which the main management modules and their function was stated, and its working flow was described.