| 采用均值量化的DCT域数字水印 |
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| 引用本文： | 王宏霞,何晨,丁科.采用均值量化的DCT域数字水印[J].计算机辅助设计与图形学学报,2004,16(8):1134-1139. |
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| 作者姓名： | 王宏霞 何晨 丁科 |
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| 作者单位： | 1. 上海交通大学电子工程系,上海,200030;西南交通大学计算机与通信工程学院,成都,610031
2. 上海交通大学电子工程系,上海,200030 |
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| 基金项目： | 国家“八六三”高技术研究发展计划 ( 2 0 0 2AA14 4110 )，中国博士后科学基金 ( 2 0 0 3 0 3 3 3 0 4)资助 |
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| 摘 要： | 采用均值量化的方法隐藏二值水印图像，分析了水印能够被正确盲提取的原理，讨论了量化步长对水印性能的影响，并估计了含水印图像的峰值信噪比(PSNR)的理论下限，最后通过实验验证了理论分析的结果．文中算法计算复杂度低，易于实时操作．
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| 关 键 词： | 均值量化 DCT 数字水印 峰值信噪比 版权保护 量化 |
Digital Watermarking Using Mean-Quantization in DCT Domain |
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| Wang Hongxia , He Chen Ding Ke.Digital Watermarking Using Mean-Quantization in DCT Domain[J].Journal of Computer-Aided Design & Computer Graphics,2004,16(8):1134-1139. |
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| Authors: | Wang Hongxia He Chen Ding Ke |
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| Affiliation: | Wang Hongxia 1,2) He Chen 1) Ding Ke 1) 1) |
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| Abstract: | Binary watermarking image is hidden by the method of mean-quantization. The principle ensuring that the watermark can be extracted blindly and correctly is analyzed. How the quantifying step size affects the properties of watermark is discussed, and theoretic inferior limit of the peak signal-to-noise ratio (PSNR) is estimated for the watermarked image. Experiments verified these theoretical analysis results. Computational complexity of the algorithm is reduced and real-time manipulation is feasible. |
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| Keywords: | digital watermark quantization robustness copyright protection |
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