基于离散小波变换和感兴趣区域的图像盲水印方案  

Image blind watermarking scheme based on discrete wavelet transform and region of interest

作　　者：易晨晖 周湘贞 侯小毛 Chen-hui YI;Xiang-zhen ZHOU;Xiao-mao HOU(School of Electronic Information,Hunan Institute of Information Technology,Changsha 410151,China;School of Computer Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]湖南信息学院电子信息学院,长沙410151 [2]北京航空航天大学计算机学院,北京100191

出　　处：《机床与液压》2020年第6期193-199,共7页Machine Tool & Hydraulics

基　　金：湖南省教育厅科学研究资助项目(17C1115);湖南省教育厅科学规划课题基金资助项目(XJK17CGD027);国家自然科学基金面上项目(61672077)。

摘　　要：为了有效提高图像水印技术的不可感知性、鲁棒性和安全性,提出了一种基于感兴趣区域和离散小波变换的鲁棒盲水印方案。该方案使用宿主图像的感兴趣区域用作水印图像。通过从宿主图像生成的水印,结合嵌入策略以及Arnold置乱来满足要求。首先,将第一级离散小波变换应用于水印,并选择近似系数作为要嵌入的信息。将各个近似系数嵌入到小波域内的宿主图像所选块的低频子带中;随后,在嵌入之前,对水印的近似系数以及宿主图像的块进行Arnold置乱。这使得该方案更加鲁棒和安全。测试数据表明:与当前水印方法相比,所提技术具有更高的鲁棒性和安全性,其水印图像的相关系数NC均稳定在0.98左右。仿真结果表明:该方案可抵抗各种攻击,实现高度的安全性、不可感知性和鲁棒性。In order to effectively improve the imperceptibility,robustness and security of image watermarking technology,a robust blind watermarking scheme based on region of interest and discrete wavelet transform is proposed.This scheme uses the region of interest of the host image as the watermark image.The requirements are met by the watermark generated from the host image,in conjunction with the embedding strategy and Arnold scrambling.First,the first-order discrete wavelet transform is applied to the watermark,and the approximation coefficient is selected as the information to be embedded.Each approximation coefficient is embedded in the low frequency subband of the selected block of the host image in the wavelet domain;then,prior to embedding,the approximation coefficients of the watermark and the block of the host image are Arnold scrambled.This makes the solution more robust and secure.The test data show that compared with the current watermarking method,the proposed technique has better robustness and security,and the correlation coefficient NC of the watermark image is stable at around 0.98.Therefore,the proposed scheme could resist various attacks and achieve high security,imperceptibility and robustness.

关 键 词：图像水印 离散小波变换 ARNOLD置乱 小波域 低频系数 感兴趣区域 盲水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]