基于小波变换的数字水印图像处理技术研究  

Research on digital watermarking image processing technology based on wavelet transform

作　　者：雷求胜 LEI Qiusheng(College of Electronic Information,Hunan University of Information Technology,Changsha 410151,China)

机构地区：[1]湖南信息学院电子信息学院,湖南长沙410151

出　　处：《电子设计工程》2021年第22期161-165,共5页Electronic Design Engineering

基　　金：湖南省教育厅科学研究重点项目(18A511)。

摘　　要：针对当前数字媒体信息受剽窃、盗用等侵权行为的不断发生,数字水印技术便是一项由此应运而生的新兴技术。为了改善数字水印技术对外界几何攻击的抵抗能力,提出基于小波变换的数字水印图像处理技术。文中对数字水印技术的基本概念、基本算法以及评价标准进行了相关介绍,并在此基础上提出了基于小波变换的数字水印算法。该算法通过二维离散小波变换将图像进行分解,然后在不同方向做插值,将具有不可感知性、抗检测性、鲁棒性的数字水印嵌入到数字载体中,且不影响数字产品的视觉效果,在发生侵权行为时,能提取出完整的水印信息。通过仿真测验,该算法在各种攻击测试中表现良好,提取出的水印状况良好,具有较高透明度和稳定性。In view of the current digital media information by plagiarism,embezzlement and other violations occur,digital watermarking technology is a new technology emerged from this.In order to improve the resistance of digital watermarking technology to external geometric attacks,a digital watermarking image processing technology based on wavelet transform is proposed.This paper introduces the basic concepts,basic algorithms and evaluation criteria of digital watermarking technology,and proposes a digital watermarking algorithm based on wavelet transform.The algorithm decomposes the image by twodimensional discrete wavelet transform,and then interpolates in different directions.The digital watermark with imperceptibility,anti detection and robustness is embedded into the digital carrier,which does not affect the visual effect of digital products.In case of infringement,it can extract the complete watermark information.Through the simulation test,the algorithm performs well in various attack tests,the extracted watermark is in good condition,and the watermark has high transparency and stability.

关 键 词：数字水印 小波变换 鲁棒性 MALLAT算法 

分 类 号：TN957.52[电子电信—信号与信息处理]