Digital watermark algorithm on image corner points

doi:10.3778/j.issn.1002-8331.2008.20.028

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (20): 89-92.DOI: 10.3778/j.issn.1002-8331.2008.20.028

• 研发、设计、测试 • Previous Articles Next Articles

Digital watermark algorithm on image corner points

XU Hai-xia^1,2,WANG Yao-nan²,ZHOU Wei¹,ZHU Jiang²,CHEN Wei^1,2

1.School of Information Engineering，Xiangtan University，Xiangtan，Hunan 411105，China
2.School of Electrical and Information Engineering，Hunan University，Changsha 410082，China

Received:2007-09-14 Revised:2007-11-24 Online:2008-07-11 Published:2008-07-11
Contact: XU Hai-xia

基于图像角点的数字水印算法

许海霞^1,2,王耀南²,周维¹,朱江²,陈维^1,2

1.湘潭大学信息工程学院，湖南湘潭 411105
2.湖南大学电气与信息工程学院，长沙 410082

通讯作者: 许海霞

Abstract

Abstract: Based on image corner points，a digital image watermark algorithm is proposed in this paper.High frequency information from original image is embedded watermark adaptively，with corner points being embedding position.To detect watermark，watermark geometric distortion can be rectified and from which got position to extract watermark accurately according to extracted corner points of marked image.Then number of the effective corner points is statistified to quantitively show the result of performance analysis.After watermark synchrony，correlation is used as judge criterion.Simulation result shows that the method is practicable with higher robustness as shearing and geometric attacks.

Key words: digital watermark, image corner points, correlation function, Noise Visibility Function（NVF）

摘要： 设计了一种基于图像角点的数字水印算法，嵌入过程以图像角点为嵌入位置，水印加性自适应嵌入于图像高频分量中。检测时，无需原始图像，水印图像角点实现对图像的几何校正及准确定位并提取水印，最后统计有效角点数，定量给出性能分析结果。实验表明，该方法可行，具有强的抗压缩、几何攻击性，不可见性，鲁棒性。

关键词: 数字水印, 图像角点, 相关函数, 噪声可见函数

XU Hai-xia^1,2,WANG Yao-nan²,ZHOU Wei¹,ZHU Jiang²,CHEN Wei^1,2. Digital watermark algorithm on image corner points[J]. Computer Engineering and Applications, 2008, 44(20): 89-92.

许海霞^1,2,王耀南²,周维¹,朱江²,陈维^1,2. 基于图像角点的数字水印算法[J]. 计算机工程与应用, 2008, 44(20): 89-92.

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Digital watermark algorithm on image corner points

基于图像角点的数字水印算法

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