| 基于混沌和离散余弦变换的数字水印算法 |
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| 引用本文： | 任丽棉,王丽侠.基于混沌和离散余弦变换的数字水印算法[J].唐山学院学报,2013,26(3):58-61. |
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| 作者姓名： | 任丽棉 王丽侠 |
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| 作者单位： | 唐山学院信息工程系,河北唐山,063000 |
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| 摘 要： | 提出了基于混沌和离散余弦变换的数字水印算法，该算法是将混沌映射序列作为水印信息，并在载体图像的离散余弦变换域较大幅度值上嵌入排序后的水印信息，而在水印提取时，再利用原图像、水印图像和密钥进行水印重构。Matlab仿真实验结果表明，该算法在保证水印不可感知性的同时，对添加噪声、高斯低通滤波、中值滤波、裁剪、旋转等常见信号处理攻击具有较强的稳健性。
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| 关 键 词： | 图像水印 离散余弦变换 混沌映射 鲁棒性 |
Digital Watermarking Algorithm Based on Chaotic and Discrete Cosine Transform |
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| REN Li-mian
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WANG Li-xia.Digital Watermarking Algorithm Based on Chaotic and Discrete Cosine Transform[J].Journal of Tangshan College,2013,26(3):58-61. |
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| Authors: | REN Li-mian WANG Li-xia |
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| Institution: | (Department of Information Engineering, Tangshan College, Tangshan 063000, China) |
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| Abstract: | A watermarking algorithm based on chaos theory and discrete cosine transform is pro- posed. In this algorithm chaotic mapping sequence as the watermark information is embedded in the relatively large values of the discrete cosine transform domain of carrier image. In the water- mark extraction process, the original image, the watermark image and key are used to reconstruct watermark. Matlab simulation results show that the proposed algorithm possesses better invisi- bility, and has strong robustness against the common signal processing such as additive Gaussian noise, low-pass filter, median filter, cutting replacement and rotation. |
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| Keywords: | image watermarking discrete cosine transform chaotic map robustness |
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