Algorithm Design And Research On Immunity Of Digital Image Watermarking

The technology of digital watermarking have very important reallisc significance to copyright protection and authentication of digital products,especially,with devementment of network rapidly,it's valuable to research digital watermatking.Now,a lot of research achievement of digital watermarking technology have came out,based on these research achievement,this paper will using immunity to research digital watermarking technology,and then researched the design of watermarking algorithm under these conception. The main works are as following:1. The human immunity system have been analysed and researched,and the conception of immunity was applied into research of digital watermarking technology. The resemblance and maping of two system was also summarized and established,and based on it, the design method of digital watermarking algorithm was researched also.2. The application of perceptual model to improve immunity of watermarking have researched in this paper. Two important performance of immune watermarking algorithm is well perceptual quality and robust,this paper designed a watermarking algorithm based on Watson Perceptual Model. This algorithm controlled the embeded intensity of watermarking by using perceptual model,and balanced relationship between perceptual quality and robust. The purpose for improve immunity of watermarking have achieved..3. The geometric invariance of Zernike Moment was analysed,and researched the application in resisting geometric attack for watermarking. Based on these research,two immune watermarking algorithm that combined perceptual model and zero-watermarking were designed: robust digital watermarking algorithm based on Zernike Moment and DCT; resist geometric attack zero-watermark algorithm based on improved Pseudo-Zernike Moment .Two algorithm not only immune to geometric attack and other common attack,but also have very well perceptual quality.4. A immune watermarking algorithm based on multiple watermarking technology is devised. Mutiple watermarking technology is another way to improve immunity of watermarking algorithm,this paper designed a dual watermarking algorithm based entropy and module,and applied the zero-watermaring technology. Two watermarking not only have robust,integrated certification,locate the tamperd block and the well perceptual quality,but also have the ability of resisting geometric attack,so,this algorithm have well immunity.