基于傅里叶变换的自适应抗打印扫描水印算法

doi:10.3969/j.issn.0255-8297.2016.03.008

应用科学学报 ›› 2016, Vol. 34 ›› Issue (3): 309-316.doi: 10.3969/j.issn.0255-8297.2016.03.008

基于傅里叶变换的自适应抗打印扫描水印算法

廖挺, 李治江

武汉大学印刷与包装系, 武汉 430079

收稿日期:2016-03-04 修回日期:2016-04-04 出版日期:2016-05-30 发布日期:2016-05-30
通信作者: 李治江,博士,副教授,研究方向:视觉分析与检测、数字出版技术等,E-mail:lizhijiang@whu.edu.cn E-mail:lizhijiang@whu.edu.cn

Adaptive Print-Scan Resilient Image Watermarking Based on Fourier Transform

LIAO Ting, LI Zhi-jiang

School of Printing and Packaging, Wuhan University, Wuhan 430079, China

Received:2016-03-04 Revised:2016-04-04 Online:2016-05-30 Published:2016-05-30

摘要/Abstract

摘要：

基于近似均匀对数极坐标变换以及傅里叶频域(discrete Fourier transform, DFT)感知通道分解,提出了一个兼顾鲁棒性和隐蔽性的盲水印算法,以抵抗普通打印扫描攻击.首先在频域分解得到中频嵌入环形区域,通过对数极坐标变换并结合局部频谱特性将水印自适应嵌入DFT中频区域,进而利用空间掩蔽对空间域图像进行失真补偿.理论分析和实验结果表明该算法具有良好的隐蔽性,对普通的打印扫描处理也获得了良好的鲁棒性.

关键词: 数字水印, 隐蔽性, 失真补偿, 傅里叶变换, 抗打印扫描

Abstract:

A robust blind watermarking scheme that combines uniform log-polar mapping and perceptual band decomposition of Fourier domain is proposed, which can resist general print-scan attacks. The proposed scheme can guarantee invisibility and increase robustness of the watermark. Perceptual band decomposition that splits the Fourier domain into overlapping sub-bands is used to locate the mid-frequency domain. Uniform log-polar mapping is applied to mid-frequencies in the Fourier domain. Watermark embedding in the mid-frequencies is adaptively controlled by the local spectrum property. Finally, a spatial perceptual mask is used to compensate distortion after the embedded image is inversely transformed back to the spatial domain. Both the theoretical analysis and experimental results show that the proposed scheme is invisible, and robust against general print-scan attacks.

Key words: distortion compensation, digital watermark, print-scan resilient, Fourier transform, imperceptibility

中图分类号:

TP391

廖挺, 李治江. 基于傅里叶变换的自适应抗打印扫描水印算法[J]. 应用科学学报, 2016, 34(3): 309-316.

LIAO Ting, LI Zhi-jiang. Adaptive Print-Scan Resilient Image Watermarking Based on Fourier Transform[J]. Journal of Applied Sciences, 2016, 34(3): 309-316.

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基于傅里叶变换的自适应抗打印扫描水印算法

Adaptive Print-Scan Resilient Image Watermarking Based on Fourier Transform

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