Study Of Watermarking For Images Based On B-spline And Radon Transform

Along with the information exchanges increasingly extensive and the universality of the network, how to protect the safety of the information become an urgent problem that demand resolve. As an important branch of the safe realm in information —watermarking technique suffer the extensive research and application. This thesis is concerned with the research to the image watermarking technique primarily, the point discussed how to make use of the characteristics of B-spline surface and the transformation of Radon in the proceeding of embedding watermarking in the DWT domain of the image. First, Introduce the basic concept of the watermarking, analyze the model, basic characteristic, typical watermarking scheme and primarily of attack method. Immediately after, the transformation of Radon characteristics of the discussion portrait with the human visual system( HVS) in the DWT domain, Here the foundation is last, putting forward a kind of watermark scheme in the DWT domain according to B-spline surface .that scheme has good adaptivity and satisfied nicely the quality of watermarked images is guaranteed and robustness, at the same time on the certain degree than goodly withstand geometric attack. Give the homologous algorithm finally with used for the experiments that verify the algorithm is effectively.