计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (20): 89-92.DOI: 10.3778/j.issn.1002-8331.2008.20.028

• 研发、设计、测试 • 上一篇    下一篇

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. 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
  • 收稿日期:2007-09-14 修回日期:2007-11-24 出版日期:2008-07-11 发布日期:2008-07-11
  • 通讯作者: 许海霞

Digital watermark algorithm on image corner points

XU Hai-xia1,2,WANG Yao-nan2,ZHOU Wei1,ZHU Jiang2,CHEN Wei1,2   

  1. 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

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

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)