| 一种基才DWT-DCT变换强鲁棒性的数字水印算法 |
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| 引用本文： | 宁国强,刘媛媛,李凤堂,张建理. 一种基才DWT-DCT变换强鲁棒性的数字水印算法[J]. 国外电子元器件, 2009, 0(11): 67-69 |
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| 作者姓名： | 宁国强 刘媛媛 李凤堂 张建理 |
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| 作者单位： | 解放军西安通信学院;中国人民解放军69029部队; |
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| 摘 要： | 提出一种基于DWT-DCT的新的数字图像水印算法。该算法充分利用离散小波变换多分辨率特性和离散余弦变换能量压缩特性．综合两种变换的优点。在嵌入时，先对宿主图像进行DWT变换，得到4个子带。选择HL子带进行DCT变换．然后将加密后的水印嵌入DCT变换后得到子带中频系数。为获得较强的安全性，在嵌入前先对水印进行混沌加密。试验结果表明基于DWT-DCT联合的水印算法具有较强的不可见性，对常见的攻击具有较强的鲁棒性。
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| 关 键 词： | 数字水印 离散小波变换(DWT) 离散余弦变换(DCT) 混沌加密 |
A robust digital image watermarking algorithm based on DWT-DCT transformation |
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| NING Guo-qiang,LIU Yuan-yuan,LI Feng-tang,ZHANG Jian-li. A robust digital image watermarking algorithm based on DWT-DCT transformation[J]. International Electronic Elements, 2009, 0(11): 67-69 |
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| Authors: | NING Guo-qiang LIU Yuan-yuan LI Feng-tang ZHANG Jian-li |
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| Affiliation: | NING Guo-qiang, LIU Yuan-yuan, LI Feng-tang, ZHANG Jian-li ( 1. Xi＇ an Communication Institute of Chinese People＇ s Liberation Army, Xi＇ an 710106, China ; 2. 69029 Unit of PLA ,Urumqi 830011, China) |
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| Abstract: | In this paper,a new robust digital image watermarking algorithm based on DWT-DCT transformation is proposed.The method makes full use of the multi-resolution characteristic of DWT and the energy-compression characteristic of DCT,integrates merits of the two transfomation.When embedding,performs DWT on the host image to decompose it into four nonoverlapping sub-bands.then selects the HL sub-band to perform DCT transformation.Then a binary encryption watermarked image is embedded in DCT transform block to com... |
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| Keywords: | digital watermarking Discrete Wavelet Transformation(DWT) Discrete Cosine Transformation(DCT) chaotic encryption |
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