【作者】 林李雄； 舒志彪；

【Author】 Lin Lixiong and Shu Zhibiao (College of Mathematics and Computer Science,Fuzhou University,Fuzhou 350108)

【机构】 福州大学数学与计算机科学学院；

【摘要】 提出一种基于Krawtchouk矩的水印算法,通过修改一些原始Krawtchouk矩并重构图像以获得水印图像.基于Krawtchouk矩与几何矩的关系,提出采用具有平移、比例缩放和旋转不变性的几何不变矩来检测水印.实验表明,与用Krawtchouk不变矩检测相比,该算法对于大角度旋转和图像平移的几何攻击具有更好的鲁棒性.更多还原

【Abstract】 In this paper,a watermark insertion and detecting scheme based on the Krawtchouk moments is proposed.Some selected low order moments are modified to obtain the watermarked image.Based on the relation between the Krawtchouk moments and the geometric moments,the geometric moment invariants are proposed to detect the watermark instead of the Krawtchouk moment invariants.Experimental results demonstrate that comparing with the algorithms using Krawtchouk moment invariants,it shows good performance against the geometric distortions like rotation and translation.更多还原