基于ICA的数字水印盲算法的实现.doc

文档介绍：南京师范大学泰州学院毕业论文题目基于 ICA 的数字水印盲算法的实现学生姓名周渊龙学号 09060436 专业计算机网络班级信科 0604 指导教师黄金凤 20 10年4月南京师范大学泰州学院本科生毕业设计(论文) I 摘要伴随着信息产业的飞速发展,信息媒体的数字化和计算机网络通讯技术使得人们对数字信息的获取极为迅捷方便,但是由于数字化技术自身特性所产生的负面效应,对数字化信息产品的非法侵权盗版和恶意篡改也日益严峻。近几年国际上提出了一种新的有效的数字产品版权保护和安全性维护的新技术——数字水印技术。本文将独立分量分析技术和数字水印技术有机地结合在一起,提出了一种基于独立分量分析的数字水印盲算法。算法利用 ICA 技术在图像特征提取的优越性能,选取合适的嵌入系数把水印信息嵌入到能量最大的图像特征分量中,很好的实现了水印的不可感知性;利用水印嵌入/提取过程和 ICA 的混叠/分离模型的相似性,实现了水印的盲提取。实验结果表明,该算法不仅具有良好的不可感知性,而且对各种攻击都具有很好的鲁棒性,同时还能实现水印的盲提取。关键词: 数字水印, 独立分量分析,盲提取。南京师范大学泰州学院本科生毕业设计(论文) II ABSTRACT With the booming development of information industry, the digitalization of information media and the exceptional growing works, we can get digital information conveniently and quickly. But the negative effect of digitalization technology has made the copyright and security of digital information products be widely threatened now. So the digital watermarking technology has been put forward for this in recent years. This bines the ponents analysis with digital watermarking, and proposes a blind digital watermarking scheme based on ICA. Making use of the great performance of ICA in the image feature extraction, we choose suit coefficients to embed the watermark into the maximum energy image feature which can realize the invisibility of watermark; Making use of parability of the process of watermark embedding/extracting and the model of ICA mixing/separating, we realize the blind extraction of the watermark. The experiments show that this watermarking scheme not only has well invisibility but also has good robustness to many attacks and can realize the blind extraction of the watermark. Key words : digital watermarking, ponent analysis , blind extraction . 南京师范大学泰州学院本科生毕业设计(论文) 1 目录摘要.......................................................................................................................... I ABSTRACT ............................................................................................................ II 第一章绪论.............................