现代数字信号处理论文.doc

《现代数字信号处理》课程论文
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目录
摘要 II
Abstract III
第1章绪论 1
1
1
2
第2章数字水印理论基础 3
数字水印的基本概念 3
数字水印的基本特征 3
数字水印的基本原理 3
第3章小波分析理论基础 6
6
8
第4章基于小波变换的数字水印算法 10
10
12
第5章总结与展望 21
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参考文献 22
基于小波变换的数字水印技术
摘要
伴随着互联网和数字多媒体技术的飞速发展,如何保护多媒体作品的版权和鉴别其真伪成为国际上研究的热门课题,数字水印作为信息隐藏技术研究领域的重要分支,是实现版权保护或跟踪侵权行为的有效方法。
本文针对基于小波变换的数字水印技术,提出了一种基于小波域的二值图像水印算法。该算法选择了检测结果直观、有特殊意义的二值图像作为原始水印,并在嵌入之前进行图像置乱预处理,以提高安全性和隐蔽性,兼顾了水印的不可见性和鲁棒性,利用多分辨率分析思想进行水印的嵌入与提取。通过大量的仿真实验,证明本文算法在保证水印不可见性的同时,对常见的图像处理如JPEG压缩、噪声、滤波、剪切等,均有较好的鲁棒性。
关键词:小波变换,数字水印,鲁棒性,不可见性
the digital watermarking technology based on the wavelet transform
Abstract
With the rapid development of the and digital multimedia technology, how to protect the copyright of multimedia works and identify true bogus es the international research hot an important branch of the information hiding technology research field, digital watermarking is the effective method to realizing the protection of the copyright and tracking the infringement.
In this paper, based on wavelet transform the digital watermarking technology, a wavelet domain based on the binary image watermarking algorithm. The algorithm chosen the test results intuitive, with special significance in the value of the original image as a watermark and embedded in the image scrambling prior to the pretreatment to enhance the safety and concealment; watermark does not take into account the visibility and robustness, Use of multi-resolution analysis of the thinking embedded watermark and extraction. Through the simulation experiments to prove that this algorithm can not watermark visibility at the same time, mon image processing such as pression, noise, and so on, have a better robustness.
Key words: wavelet transform,digital watermarking, robustion, visibility
第1章绪论

随着信息技术和计算机网络的飞速发展,数字多媒体信息包括图像、文本音视频、三维模型的存储、复制与传播变得非常方便。我们在通过互联网方便快捷的获取多媒体信息的同时