| 一类基于SVD的数字水印虚警分析与改进算法 |
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| 引用本文： | 肖亮,叶建兵,韦志辉. 一类基于SVD的数字水印虚警分析与改进算法[J]. 南京理工大学学报(自然科学版), 2010, 34(2) |
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| 作者姓名： | 肖亮 叶建兵 韦志辉 |
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| 作者单位： | 1. 计算机科学与技术学院,江苏,南京,210094
2. 泰州科技学院,江苏,泰州,225300 |
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| 基金项目： | 国家自然科学基金(60802039);;教育部博士点基金(20070288050) |
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| 摘 要： | 讨论一类基于奇异值分解(SVD)的水印算法的高虚警率问题及其产生原因。分析认为SVD水印算法虚警率高的根本原因是:图像SVD分解的基空间与图像内容相关;奇异值向量与图像之间并不存在一一对应关系,不能刻画图像的几何结构。算法主要缺陷并不是出现在提取算法,而是嵌入算法仅仅植入了水印图像的奇异值向量,没有水印图像在基空间的结构信息。因此,该文提出了一个基于分块SVD和离散余弦变换(DCT)分解的改进算法。该算法通过在版权图像的奇异值向量中嵌入水印图像的DCT系数,克服了经典SVD水印算法的虚警问题,因而稳健性高。实验验证了理论分析和算法的有效性。
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| 关 键 词： | 版权保护 数字水印 奇异值分解 虚警错误 |
Analysis of High False Alarm in SVD Based Watermarking and Improved Algorithm |
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| XIAO Liang,YE Jian-bing,WEI Zhi-hui. Analysis of High False Alarm in SVD Based Watermarking and Improved Algorithm[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2010, 34(2) |
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| Authors: | XIAO Liang YE Jian-bing WEI Zhi-hui |
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| Affiliation: | 1.School of Computer Science and Technology/a>;NUST/a>;Nanjing 210094/a>;China/a>;2.Taizhou Institute of Science and Technology/a>;Taizhou 225300/a>;China |
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| Abstract: | The problem of high false alarm for a class of singular value decomposition(SVD) based image watermarking algorithms is investigated and the corresponding essential reasons are discussed.The intrinsic reasons that cause the high false alarm problem are: the basis space of SVD is relative to image content;there is no one-to-one correspondence between singular value vector and image;singular value vectors have no information of the structure of image,thus the most important reason is a result of false concept... |
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| Keywords: | copyright protection digital watermarking singular value decomposition false alarm errors |
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