用于信息追踪的文本水印算法  

Document watermarking scheme for information tracking

作　　者：亓文法[1] 李晓龙[1] 杨斌[1] 程道放[1] 

机构地区：[1]北京大学计算机科学技术研究所,北京100871

出　　处：《通信学报》2008年第10期183-190,共8页Journal on Communications

摘　　要：提出了一种用于二值文本图像的数字水印算法。该方法首先对文本图像进行字符切分,然后在乘性变换模型的假设之下,通过翻转字符图像的边界像素点来实现水印嵌入。同时,提出了一种完善的边界点翻转策略,使得嵌入水印的图像很难发现被修改的痕迹。实验表明,该算法可以有效抵抗打印和复印攻击,从而达到对于纸质文本文件的信息隐藏的目的,可以用于纸质文本文件的消息源头追踪。A digital watermarking scheme for binary document image was proposed. First, a binary document image was segmented into individual characters. Then, based on the multiplicative transformation model, watermark was embedded by flipping the boundary points of each character. Moreover, a strategy is proposed for flipping the boundary points to ameliorate the visual imperceptibility of the watermarked image. Extensive experimental results show that the proposed scheme is effective to resist print-and-copy, it can achieve the purpose of hiding information in paper documents and can be used for information tracking.

关 键 词：信息安全 数字水印 二值文本图像 打印-复印 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]