抗缩放攻击的高水印容量数字水印算法  

High Capacity Digital Watermarking Algorithm against Scaling Attacks

作　　者：王潇 徐建刚[1] WANG Xiao;XU Jian-gang(School of Architecture and Urban Planning,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学建筑与城市规划学院

出　　处：《包装工程》2019年第17期216-226,共11页Packaging Engineering

基　　金：国家自然科学基金(51778278,51278239)

摘　　要：目的为了增加水印算法的可嵌入水印信息容量,解决抗高强度缩放攻击等问题,提出一种基于圆形角度模板的抗缩放攻击、高水印容量的数字水印算法。方法首先将原始水印信息转换为QR码,根据QR码生成原理提取其数据编码,并进行分组,再将分组的编码转换为角度信息;随机生成具有方向性和周期性的基础圆形模板水印,根据角度信息对其进行旋转,生成待嵌入的圆形角度模板水印;通过修改图像的最小可察觉误差完成水印信息的嵌入;通过检测模板水印中的角度信息,提出水印信息。结果实验结果表明,该算法不仅可有效抵抗高强度的缩放攻击,同时还可以抵抗色彩调整、旋转、压缩、噪声、滤波、模糊等攻击。此外,该算法可实现较高容量的水印信息嵌入和无损提取。结论通过对水印信息预处理和圆形角度模板水印的应用,不仅使得该算法具备高水印容量,而且可有效抵抗高强度缩放攻击,在抵抗色彩调整、旋转等图像处理攻击方面同样具备较强的鲁棒性,能满足实际应用需求。The work aims to propose a digital watermarking algorithm based on circular angle template for anti-scaling attack and with high watermark capacity,in order to improve the embeddable watermark information capacity of watermarking algorithm and solve the problem of high-intensity scaling attack.Firstly,the original watermark information was converted into a QR code.The data code was extracted according to the QR code generation principle,and then grouped and converted into angle information.Secondly,a basic circular template watermark with directionality and periodicity was randomly generated.Then,it was rotated according to the angle information to generate a circular angle template watermark to be embedded.Thirdly,the embedding of the watermark information was completed by modifying the just noticeable distortion(JND)of the image.Finally,the watermark information was extracted by detecting the angle information in the template watermark.The experimental results showed that,the proposed algorithm could not only effectively resist highintensity scaling attacks,but also resist color adjustment,rotation,JPEG compression,noise,filtering and blurring.In addition,the algorithm could achieve the embedding and lossless extraction of higher capacity watermark information.Through the application of watermark information preprocessing and circular angle template watermarking,the watermarking algorithm not only has high watermark capacity,but also can effectively resist high-intensity anti-scaling attacks.In addition,it also has strong robustness against image processing attacks such as color adjustment and rotation,which meets the needs of practical applications.

关 键 词：QR码 预处理 圆形角度模板 抗缩放攻击 高水印容量 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]