| 一种基于Krawtchouk矩的水印算法 |
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| 引用本文： | 林李雄,舒志彪.一种基于Krawtchouk矩的水印算法[J].计算机研究与发展,2009,46(Z1). |
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| 作者姓名： | 林李雄 舒志彪 |
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| 作者单位： | 福州大学数学与计算机科学学院,福州,350108 |
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| 基金项目： | 福建省教育厅科技基金项目，福州大学科技发展基金项目 |
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| 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.
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| 关 键 词： | Krawtchouk矩 Krawtchouk不变矩 几何不变矩 数字水印 |
A Watermark Algorithm Based on Krawtchouk Moments |
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| Lin Lixiong,Shu Zhibiao.A Watermark Algorithm Based on Krawtchouk Moments[J].Journal of Computer Research and Development,2009,46(Z1). |
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| Authors: | Lin Lixiong Shu Zhibiao |
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| 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. |
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| Keywords: | Krawtchouk moment Krawtchouk moment invariant geometric moment invariant digital watermark |
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