| 基于中值滤波的小波域水印算法 |
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| 引用本文： | 温泉秀,杨建伟.基于中值滤波的小波域水印算法[J].计算机工程,2009,35(18):151-153. |
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| 作者姓名： | 温泉秀 杨建伟 |
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| 作者单位： | 南京信息工程大学数理学院,南京,210044 |
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| 基金项目： | 江苏省高校自然科学基础研究基金资助项目，南京信息工程大学基金资助项目 |
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| 摘 要： | 提出一种小波域鲁棒图像水印算法，水印信息被嵌入小波变换的低频子带。为检测对视觉不敏感的离散小波变换低频系数，将小离散波变换的低频子带进行中值滤波，并与原小波变换低频子带的小波变换系数比较，对变化程度小的系数嵌入水印信息。实验结果表明，该算法与基于小波低通滤波的水印算法相比，保证不可见性，对压缩、中值滤波、剪切、锐化等具有更强的鲁棒性。
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| 关 键 词： | 数字水印 离散小波变换 中值滤波 低频子带 |
| 修稿时间： | |
Wavelet Domain Watermark Algorithm Based on Median Filtering |
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| WHEN Quan-xiu,YANG Jian-wei.Wavelet Domain Watermark Algorithm Based on Median Filtering[J].Computer Engineering,2009,35(18):151-153. |
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| Authors: | WHEN Quan-xiu YANG Jian-wei |
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| Affiliation: | College of Mathematic and Physics;Nanjing University of Information Science and Technology;Nanjing 210044 |
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| Abstract: | This paper proposes a robust digital watermark algorithm based on Discrete Wavelet Transform(DWT) to embed digital watermark into low frequency sub-image.In order to detect low frequency coefficients of DWT which insensitive to visibility, it makes low frequency sub-band median-filted and compared with original low frequency, and embeds the watermark into small changes of the cofficients.The paper compares the proposed algorithm with the watermark algorithm based on the low-pass filtering.Experimental resul... |
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| Keywords: | digital watermark Discrete Wavelet Transform(DWT) median filtering low frequency area |
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