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应用科学学报 >

2011 , Vol. 29 >Issue 3: 281 - 288

DOI: https://doi.org/10.3969/j.issn.0255-8297.2011.03.011

信号与信息处理

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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  • 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200072
    2．上海大学通信与信息工程学院，上海200072
黄素娟，博士，高工，研究方向：信息隐藏、数字全息，E-mail: sjhuang@shu.edu.cn

收稿日期: 2010-07-27

  修回日期: 2011-03-02

  网络出版日期: 2011-05-25

基金资助

上海市重点学科和科委重点实验室项目基金(No.S30108, No.08DZ2231100)资助

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Print-Scan Resilient Watermarking Based on Digital Hologram and Distortion Correction

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  • 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

Received date: 2010-07-27

  Revised date: 2011-03-02

  Online published: 2011-05-25

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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.

关键词： 抗打印扫描; 数字全息; 失真校正; 图像水印

本文引用格式

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

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 magnitude 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, and is capable of extracting the embedded watermark from a print-scan version reliably. Compared with previous similar schemes, the proposed approach shows advantages in invisibility, robustness and embedding capacity.

Key words：  print-scan resilient; digital hologram; correction of distortion; image watermarking

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