PDF全文下载:2015040443
李莹, 李春兴, 于晓(青岛市电子政务和信息资源管理办公室,山东 青岛 266072)
摘要: 提出了一种基于DCT鲁棒性的数字水印算法。水印嵌入之前先使用一种提出的扩充水印的技术将水印行列数扩充一倍,然后使用Sine混沌系统产生的混沌序列对扩充后的水印进行加密。在水印嵌入阶段,使用了一种效果良好的自适应性嵌入算法在分块DCT系数中嵌入水印。最后,进行几何攻击、抗噪声攻击和抗压缩攻击等攻击测试实验表明算法具有良好的抗几何攻击、抗噪声及抗压缩性能。
关键词: 数字水印; DCT; 混沌; 适应性; 鲁棒性
中图分类号: TP 309 文献标志码: A
An Robust Watermarking Algorithm Based on DCT
LI Ying, LI Chunxing, YU Xiao
(Qingdao EGovernment and Information Resources Management Office, Qingdao 266072, China)
Abstract: This paper proposes a watermarking algorithm based on DCT. Extend both rows and columns of the watermark using a proposed method before embedding stage. After expansion Sine chaotic system is employed in encrypting watermark. In the embedding stage, an effective and adaptive embedding algorithm is proposed to embed watermark into the blocked DCT coefficients. Experimental results demonstrate that the proposed method in this paper works well in resisting geometry attack, noise attack and JPEG compression.
Key words: watermark; DCT; chaotic; adaptive; robust
收稿日期: 20140915
作者简介: 李莹(1986—),女,硕士.
文章编号:16726987(2015)04044306; DOI: 10.16351/j.16726987.2015.04.018