| 一种改进的DCT和SVD联合的数字图像水印算法 |
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| 引用本文： | 刘俊景,蒋华. 一种改进的DCT和SVD联合的数字图像水印算法[J]. 计算机工程与科学, 2009, 31(1) |
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| 作者姓名： | 刘俊景 蒋华 |
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| 作者单位： | 桂林电子科技大学计算机系,广西,桂林,541004;桂林电子科技大学计算机系,广西,桂林,541004 |
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| 摘 要： | 结合奇异值分解(SVD)和离散余弦变换(DCT)的特点,本文提出了一种改进的DCT和SVD联合的数字图像水印算法。该算法能够很好地解决透明性和鲁棒性之间的矛盾。算法中按Z字型选取低频系数,再结合SVD分解的方法嵌入水印,不仅增加了嵌入的信息量,而且提高了水印的安全性。实验结果表明,该算法不仅具有较好的透明性,而且对常见攻击如叠加噪声、JPEG压缩、滤波以及几何攻击等具有较好的鲁棒性。
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| 关 键 词： | 数字水印 鲁棒性 离散余弦变换 奇异值分解 |
An Improved Watermarking Algorithm for Digital Images Based on DCT and SVD |
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| LIU Jun-jing,JIANG Hua. An Improved Watermarking Algorithm for Digital Images Based on DCT and SVD[J]. Computer Engineering & Science, 2009, 31(1) |
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| Authors: | LIU Jun-jing JIANG Hua |
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| Affiliation: | Department of Computer Science;Guilin University of Electronics Technology;Guilin 541004;China |
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| Abstract: | A novel watermarking algorithm for digital images based on DCT and SVD is proposed in this paper,which combines both the merits of discrete cosine transform(DCT) and singular value decomposition(SVD).The conflicts between transparency and robustness of the watermarking system is better solved by the algorithm.Firstly,we select some low frequency coefficients of the original image in a zig-zig order to create a matrix the same size as the watermarking images.Then,the digital watermarks are embedded by SVD.It... |
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| Keywords: | watermark robust DCT SVD |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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