| 利用小波包变换和误差扩散的打印扫描图像水印算法 |
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| 引用本文： | 徐宏平,万晓霞.利用小波包变换和误差扩散的打印扫描图像水印算法[J].武汉大学学报(信息科学版),2011(8):978-981. |
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| 作者姓名： | 徐宏平 万晓霞 |
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| 作者单位： | 武汉大学印刷与包装系;武汉大学遥感信息工程学院; |
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| 基金项目： | 武汉大学测绘遥感信息工程国家重点实验室专项科研基金资助项目(904162598) |
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| 摘 要： | 提出了一种基于小波包变换和误差扩散的打印扫描图像水印算法。首先对图像进行三层小波包分解,并将其作为水印嵌入到分解后的高频分量的低频子带,然后进行小波包重构得到嵌入水印的图像,再运用改进的噪声平衡误差扩散算法加网得到含水印的半色调图像。实验表明,该算法对于打印扫描过程的无意攻击具有良好的鲁棒性。
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| 关 键 词： | 小波包变换 打印扫描 误差扩散 数字水印 |
Watermarking Algorithm for Print-Scan Based on Wavelet-Packet Transform and Error Diffusion |
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| XU Hongping, WAN Xiaoxia.Watermarking Algorithm for Print-Scan Based on Wavelet-Packet Transform and Error Diffusion[J].Geomatics and Information Science of Wuhan University,2011(8):978-981. |
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| Authors: | XU Hongping WAN Xiaoxia |
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| Institution: | XU Hongping1,2 WAN Xiaoxia1(1 Department of Printing and Packaging,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(2 School of Remote Sensing and Information Engineering,China) |
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| Abstract: | A watermarking algorithm for print-scan based on wavelet packet transform and error diffusion is introduced.This method manipulates the original image by three layer wavelet packet transform,and adds watermark onto the low frequency subband by high frequency components,then the image by modified noise-balanced error diffusion halftone image screening.The experimental results show that the algorithm is high robust against for print-scan. |
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| Keywords: | wavelet packet transform print-scan error diffusion digital watermark |
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