摘要
旋转、缩放和平移(RST)等几何攻击能够破坏水印检测的同步性,使得水印检测失败。针对此问题,提出了一种基于图像局部Zernike矩的RST不变零水印算法。Zernike矩的幅度具有旋转不变性,再结合图像归一化,使其具有缩放和平移不变性。由于Zernike矩的图像重构效果不理想且重构过程中复杂度高,因此水印嵌入选择零水印方案。实验结果表明,该算法对旋转、缩放和平移(RST)的攻击具有很好的鲁棒性,同时对JPEG压缩、加噪、滤波等常见的图像处理操作也具有很好的鲁棒性。
Geometrical attacks, such as rotation, scale and translation（RST） attack, can desynchronize the watermark detection, a RST invariant zero-watermarking algorithm is proposed by using local Zernike moments in this paper. Rotation invariance is achieved by taking the magnitude of the Zernike moments. Image normalization method is used for scale and translation invariance. Because of the reconstruction procedure suffering the fidelity degradation and requiring Zernike moments with high order, zero-watermarking technique is employed. Experimental results show that the scheme is robust against rotation, scale and translation（RST）, as well as a variety of common manipulations such as JPEG compression, additive noise and filtering.
出处
《微型机与应用》
2011年第16期47-50,共4页
Microcomputer & Its Applications
基金
福建省自然科学基金资助项目(2010J01340)
