| 基于数字全息及失真校正的抗打印扫描数字图像水印 |
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| 引用本文： | 黄素娟,王杜瑶,任艳丽. 基于数字全息及失真校正的抗打印扫描数字图像水印[J]. 应用科学学报, 2011, 29(3): 281-288. DOI: 10.3969/j.issn.0255-8297.2011.03.011 |
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| 作者姓名： | 黄素娟 王杜瑶 任艳丽 |
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| 作者单位： | 1．上海大学特种光纤与光接入网省部共建重点实验室，上海2000722．上海大学通信与信息工程学院，上海200072 |
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| 基金项目： | 上海市重点学科和科委重点实验室项目基金 |
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| 摘 要： | 提出一种基于数字全息及失真校正的抗打印扫描数字图像水印方法，将水印以数字全息图的方式隐藏在载体图像离散傅里叶变换(discrete Fourier transform, DFT) 幅度谱中，由载体图像纹理控制的峰值信噪比设定阈值，自适应调节水印嵌入强度. 该方法利用了数字全息图的特点，采用基于DFT和边缘检测算法校正打印扫描图像的旋转失真，因而可从打印扫描图像中准确提取水印信号. 相比以往同类水印算法，所提方法具有优良的不可见性和鲁棒性，以及较大的水印嵌入量.
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| 关 键 词： | 抗打印扫描 数字全息 失真校正 图像水印 |
| 收稿时间： | 2010-07-27 |
| 修稿时间： | 2011-03-02 |
Print-Scan Resilient Watermarking Based on Digital Hologram and Distortion Correction |
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| HUANG Su-juan,WANG Du-yao,REN Yan-li. Print-Scan Resilient Watermarking Based on Digital Hologram and Distortion Correction[J]. Journal of Applied Sciences, 2011, 29(3): 281-288. DOI: 10.3969/j.issn.0255-8297.2011.03.011 |
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| Authors: | HUANG Su-juan WANG Du-yao REN Yan-li |
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| Affiliation: | 1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University,;Shanghai 200072, China;2. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | This paper presents a novel print-scan resilient watermarking algorithm based on digital hologram and correction of distortion.A hologram of the watermark is obtained and embedded into the spectral mag-nitude of the host image.A PSNR threshold adapted to the texture of the host image is set to adjust the watermark strength.The rotation distortion due to the print-scan process is corrected based on discrete Fourier transform(DFT) and edge detection.The method makes use of the digital hologram characteristics... |
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| Keywords: | print-scan resilient digital hologram correction of distortion image watermarking |
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