基于图像角点特征的第二代水印算法研究

杨娟; 杨丹; 张小洪

doi:10.11834/jig.20090517

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专辑

基于图像角点特征的第二代水印算法研究
Research on Second Generation Watermarking Algorithm Based on Image Corner Feature
2009年14卷第5期页码：884
纸质出版：2009
DOI： 10.11834/jig.20090517
稿件说明：

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杨娟, 杨丹, 张小洪. 基于图像角点特征的第二代水印算法研究[J]. 中国图象图形学报, 2009,14(5):884. DOI： 10.11834/jig.20090517.

Research on Second Generation Watermarking Algorithm Based on Image Corner Feature[J]. Journal of Image and Graphics, 2009, 14(5): 884. DOI： 10.11834/jig.20090517.

摘要

提出了一种新颖的基于图像角点特征的第2代水印算法。该方法首先将水印图像进行置乱预处理，其次对载体图像进行小波3级提升，然后利用第2步的结果和多尺度曲率积角点检测（MSP）方法，提取出图像最低频成分中的角点，最后在角点位置对应的所有高频系数中嵌入水印。检测时，在这些系数上做水印嵌入的逆运算，并用事先得到的密钥反变换出水印。实验结果表明，所提出的水印算法较第1代数字水印算法不仅在运行速度上大大提高，而且在抵抗旋转、放缩、平移、裁剪等几何攻击方面的鲁棒性也有显著提高。

Abstract

In this paper

a noval second generation watermarking algorithm based on image corner feature is proposed.Firstly

the watermark image is scrambled by using Arnold transformation. Secondly

wavelet transformation based three-level lifting for the carrier image is conducted. Thirdly

utilized the outcome of second step and MSP method

corners are detected from the low frequency components. Finally

by taking corners as root nodes

all the corresponding high frequency coefficients are extracted. Inverse operation of embedding watermark is performed with those coefficients. And using the given key

the watermark can be obtained. Sufficient experiments demonstrate the robustness of this approach

especially in resisting geometry attack such as RST (Rotation

Scaling and translation)and cut attack.