基于置乱和混沌的小波数字图像水印应用研究

发布时间：2019-01-05 12:37

【摘要】：地理空间数据是研究地球表面自然、人文要素的特点及空间分布特征的数据，是国家基础设施建设和地球科学研究的支撑性成果。地理空间数据因包含大量特有的空间位置及敏感信息，其安全问题涉及到知识产权保护、信息泄密和国家安全问题等的各个方面。随着计算机网络和通信技术的快速发展，开放的网络环境和便捷的信息处理技术，导致了数字作品的版权保护等问题变得日益突出。数字水印技术是近年来信息隐藏技术研究领域的一个重要分支，在数字产品的版权保护、隐秘通信等方面存在巨大的潜在应用价值。因此，对数字栅格地图水印技术的研究具有极其重要的意义。本文以基于置乱变换和混沌加密的小波数字水印为基础，结合数字栅格地图的数据特性，运用数字水印技术对数字栅格地图进行加密处理。论文分析了数字水印技术的基本原理，分析了数字栅格地图的数据特性，指出了数字栅格地图水印的研究现状和意义，对数字栅格地图水印的应用展开了研究。应用一种基于小波变换的水印算法实现数字栅格地图的加密保护的目的，分析了小波变换与数字栅格地图相结合后在版权保护中的优势，对水印嵌入和提取的过程进行阐述；应用一种基于Arnold置乱变换和Logistic混沌加密的水印生成算法，对数字栅格地图进行小波变换数字水印加密，，并通过实验加以验证该算法具有较好的安全性和鲁棒性，具有较强的实用性。
[Abstract]:Geospatial data are the data of studying the nature of the earth's surface, the characteristics of human elements and their spatial distribution, and are the supporting achievements of the national infrastructure construction and the research of earth science. Because geospatial data contains a large number of special spatial location and sensitive information, its security issues involve various aspects such as intellectual property protection, information disclosure and national security issues. With the rapid development of computer network and communication technology, the open network environment and convenient information processing technology lead to the copyright protection of digital works become increasingly prominent. Digital watermarking is an important branch of information hiding technology in recent years. It has great potential application value in copyright protection and secret communication of digital products. Therefore, the research of digital raster map watermarking technology is of great significance. In this paper, the digital watermarking based on scrambling transform and chaotic encryption is used to encrypt the digital raster map by combining the data characteristics of the digital raster map. This paper analyzes the basic principle of digital watermarking technology, analyzes the data characteristics of digital raster map, points out the research status and significance of digital raster map watermarking, and studies the application of digital raster map watermarking. A watermarking algorithm based on wavelet transform is used to realize the encryption protection of digital raster map. The advantages of the combination of wavelet transform and digital raster map in copyright protection are analyzed, and the process of watermark embedding and extracting is described. A watermarking generation algorithm based on Arnold scrambling transform and Logistic chaotic encryption is used to encrypt digital raster map with wavelet transform, and the experimental results show that the algorithm has good security and robustness. It has strong practicability.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP309.7

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