GEOMETRICALLY INVARIANT WATERMARKING BASED ON RADON TRANSFORMATION  

作　　者：CaiLian DuSidan GaoDuntang 

机构地区：[1]DeptofElectronicScienceandEng.,NanjingUniv.,Nanjing210093,China

出　　处：《Journal of Electronics(China)》2005年第3期301-306,共6页电子科学学刊（英文版）

摘　　要：The weakness of classical watermarking methods is the vulnerability to geometrical distortions that widely occur during normal use of the media. In this letter, a new image- watermarking method is presented to resist Rotation, Scale and Translation (RST) attacks. The watermark is embedded into a domain obtained by taking Radon transform of a circular area selected from the original image, and then extracting Two-Dimensional (2-D) Fourier magnitude of the Radon transformed image. Furthermore, to prevent the watermarked image from degrading due to inverse Radon transform, watermark signal is inversely Radon transformed individually. Experimental results demonstrate that the proposed scheme is able to withstand a variety of attacks including common geometric attacks.The weakness of classical watermarking methods is the vulnerability to geometrical distortions that widely occur during normal use of the media. In this letter, a new image- watermarking method is presented to resist Rotation, Scale and Translation (RST) attacks. The watermark is embedded into a domain obtained by taking Radon transform of a circular area selected from the original image, and then extracting Two-Dimensional (2-D) Fourier magnitude of the Radon transformed image. Furthermore, to prevent the watermarked image from degrading due to inverse Radon transform, watermark signal is inversely Radon transformed individually. Experimental results demonstrate that the proposed scheme is able to withstand a variety of attacks including common geometric attacks.

关 键 词：Copyright protection AUTHENTICATION Radon transformation Geometrical at- tacks Invariant centroid 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]