Digital Image Watermarking Technology And Applied Research

In recent years, as the rapid development of computer multimedia technology and computer network technology, people can more and more easily produce, copy, transmit and distribute a variety of multimedia information images, such as audio, video, text and so on. However, the development of technology is accompanied by two sides. The emergence of new technologies makes the pirates can be much easier to use the convenient technology copying and transmit unauthorized digital product information. Triggering a variety issues of multimedia information network transport security and digital copyright protection. Digital watermarking, as today's an important means of copyright protection of digital products. Now got people's attention.In this dissertation, elaborated on the discovery of the status quo of the digital watermark, the basic principles and existing research results and introduced the two different types of digital watermarking algorithms, attacks by common experiments were compared.First, Researched and achieved the airspace watermarking algorithm in the classical method of LSB watermarking algorithm, and by attacking experiment was examined. For the LSB watermarking algorithm robustness is not strong, research and achieved one new kind of DCT-based digital watermarking algorithm based on watermarking algorithm, and carried out attacks on common experiments, to give validation. Finally, present a watermarking technology-based video surveillance systems. The system has a wide range of practical significance and market prospects.