| 一种基于Cox算法的分块DCT图像水印算法研究 |
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| 引用本文： | 金灿.一种基于Cox算法的分块DCT图像水印算法研究[J].计算机安全,2011(7):17-19. |
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| 作者姓名： | 金灿 |
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| 作者单位： | 湖南文理学院现代教育技术中心,湖南常德415000;中南大学信息科学与工程学院,湖南长沙410083 |
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| 摘 要： | 介绍了DCT域图像水印技术,详细分析了经典的Cox算法和一种基于块分类的自适应图像水印算法；通过分析图像在流通中可能经常遇到的一些信号处理、几何变换以及可能性攻击,对水印算法进行了分析、实验和测试.Cox算法是一种基于DCT变换的扩频水印技术,它将高斯随机序列加入到图像的DCT变换后视觉最重要的系数中.基于块分类的自适...
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| 关 键 词： | 数字水印 离散余弦变换 分块 鲁棒性 扩频 |
Research on a DCT Image Watermarking Algorithm based on Block Classification |
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| JIN Can.Research on a DCT Image Watermarking Algorithm based on Block Classification[J].Network & Computer Security,2011(7):17-19. |
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| Authors: | JIN Can |
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| Affiliation: | JIN Can1,2(1.Modern Education Technology Center,Hunan University of Arts and Science,Changde,Hunan 415000,China,2.School of Information Science and Engineering,Central South University,Changsha,Hunan 410083,China) |
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| Abstract: | This paper introduces image watermarking technology in DCT domain,detailedly analyzes classic Cox algorithm and an adaptive image watermarking algorithm based on block classification,then carries on the implementation of the corresponding algorithm and realizes the analysis,experimentation and simulation of the corresponding algorithm.In Cox algorithm,Gaussian random vector that is imperceptibly inserted in a spread-spectrum-like fashion into the perceptually most significant spectral components of the imag... |
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| Keywords: | Digital Watermarking Discrete Cosine Transform Block Classification Robustness Spread Spectrum |
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