基于半色调图像的抗打印扫描防伪水印算法  

Antiprint and scan security watermarking algorithm based on halftone image

作　　者：石智源 王英志[1] 张银银 胡俊[1] 韩太林[1] 朱宝成 SHI Zhiyuan;WANG Yingzhi;ZHANG Yinyin;HU Jun;HAN Tailin;ZHU Baocheng(School of Electronic Information Engineering,Changchun University of Science and Technology Changchun 130012,China;Changchun Baocheng Weiye Auto Parts Co Ltd,Changchun 130051,China)

机构地区：[1]长春理工大学电子信息工程学院,吉林长春130012 [2]长春市宝成伟业汽车零部件有限公司,吉林长春130051

出　　处：《传感器与微系统》2024年第6期149-152,共4页Transducer and Microsystem Technologies

基　　金：吉林省科技发展计划资助项目(20200401116GX,20200602005ZP)。

摘　　要：提出一种基于阈值调整点扩散图像与主从像素对切换的抗打印扫描防伪水印算法。首先,改变点扩散过程中的单一误差扩散核与量化阈值;然后,将水印图像利用Arnold置乱与混沌加密进行加密处理;最后,采用主从像素对切换的方式在半色调图像内部进行水印信息的嵌入。实验结果表明:嵌水印图像内部不存在周期性图案,在打印扫描、剪切、涂抹和噪声等攻击下,水印的正确解码率在85%以上,与其他同类算法相比,表现出更强的鲁棒性。An anti-print-scanning anti-counterfeiting watermarking algorithm based on threshold-adjusted dot diffusion image and master-slave pixel pair switching is proposed.Firstly,the single error diffusion kernel and quantization threshold in the point diffusion process are changed.Then,the watermark image is encrypted by Arnold scrambling and chaotic encryption.Finally,the watermark information is embedded in the halftone image by switching the master-slave pixel pair.The experimental results show that there is no periodic pattern inside the watermarked image,and the correct decoding rate of the watermark is more than 85%under the attack of printing scanning,cutting,painting and noise,which shows stronger robustness than other similar algorithms.

关 键 词：点扩散 像素对切换 抗打印扫描防伪水印 半色调图像 鲁棒性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]