【摘要】：地理空間數(shù)據(jù)是研究地球表面自然、人文要素的特點(diǎn)及空間分布特征的數(shù)據(jù)，是國家基礎(chǔ)設(shè)施建設(shè)和地球科學(xué)研究的支撐性成果。地理空間數(shù)據(jù)因包含大量特有的空間位置及敏感信息，其安全問題涉及到知識產(chǎn)權(quán)保護(hù)、信息泄密和國家安全問題等的各個方面。隨著計算機(jī)網(wǎng)絡(luò)和通信技術(shù)的快速發(fā)展，開放的網(wǎng)絡(luò)環(huán)境和便捷的信息處理技術(shù)，導(dǎo)致了數(shù)字作品的版權(quán)保護(hù)等問題變得日益突出。數(shù)字水印技術(shù)是近年來信息隱藏技術(shù)研究領(lǐng)域的一個重要分支，在數(shù)字產(chǎn)品的版權(quán)保護(hù)、隱秘通信等方面存在巨大的潛在應(yīng)用價值。因此，對數(shù)字柵格地圖水印技術(shù)的研究具有極其重要的意義。 本文以基于置亂變換和混沌加密的小波數(shù)字水印為基礎(chǔ)，結(jié)合數(shù)字柵格地圖的數(shù)據(jù)特性，運(yùn)用數(shù)字水印技術(shù)對數(shù)字柵格地圖進(jìn)行加密處理。論文分析了數(shù)字水印技術(shù)的基本原理，分析了數(shù)字柵格地圖的數(shù)據(jù)特性，指出了數(shù)字柵格地圖水印的研究現(xiàn)狀和意義，對數(shù)字柵格地圖水印的應(yīng)用展開了研究。應(yīng)用一種基于小波變換的水印算法實現(xiàn)數(shù)字柵格地圖的加密保護(hù)的目的，分析了小波變換與數(shù)字柵格地圖相結(jié)合后在版權(quán)保護(hù)中的優(yōu)勢，對水印嵌入和提取的過程進(jìn)行闡述；應(yīng)用一種基于Arnold置亂變換和Logistic混沌加密的水印生成算法，對數(shù)字柵格地圖進(jìn)行小波變換數(shù)字水印加密，，并通過實驗加以驗證該算法具有較好的安全性和魯棒性，具有較強(qiáng)的實用性。
[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.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP309.7

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