| 一种利用小波系数幅值关系的鲁棒水印算法 |
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| 引用本文： | 胡青,龙冬阳,卢伟.一种利用小波系数幅值关系的鲁棒水印算法[J].小型微型计算机系统,2011,32(4). |
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| 作者姓名： | 胡青 龙冬阳 卢伟 |
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| 作者单位： | 1. 中山大学信息科学与技术学院,广东,广州,510275;中山大学数学与计算科学学院,广东广州,510275
2. 中山大学信息科学与技术学院,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金项目(60803136)资助; 广州市科技计划(2009J1-C541-2)资助 |
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| 摘 要： | 为了实施图像的版权保护,提出一种利用小波系数幅值关系的水印算法.原始图像通过小波分解得到小波系数,中频子带中多个不重叠的小波系数伪随机地被分为一组.利用每组数据中两个重要系数幅值的相对关系特征和水印信息生成密钥.保存密钥,并在密钥的控制下提取水印.实验结果表明本文提出的算法不仅能有效抵抗JPEG压缩,低通滤波、高斯噪声和几何攻击,而且水印图像的PSNR可以保持在50dB以上.
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| 关 键 词： | 小波变换 重要系数 幅值关系 数字水印 |
Robust Watermark Algorithm Using the Magnitude Relationship of Wavelet Coefficients |
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| HU Qing,LONG Dong-yang,LU Wei.Robust Watermark Algorithm Using the Magnitude Relationship of Wavelet Coefficients[J].Mini-micro Systems,2011,32(4). |
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| Authors: | HU Qing LONG Dong-yang LU Wei |
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| Affiliation: | HU Qing1,2,LONG Dong-yang1,LU Wei11(School of Information Science and Technology,Sun Yat-Sen University,Guangzhou 510275,China)2(School of Mathematics and Computational Science,China) |
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| Abstract: | In order to protect the copyright of the image,a blind robust watermark algorithm based on the wavelet coefficients magnitude relationship is presented.The host image is transformed into wavelet coefficients using the DWT,non-overlap wavelet coefficients in the middle frequency band are divided into groups in a pseudorandom manner.A secret key is generated by magnitude relationship characteristic of two important coefficients.The key is saved and used to extract watermark.The experimental results show that ... |
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| Keywords: | wavelet transform important coefficient magnitude relationship digital watermarking |
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