一种基于文本图像的纯文本自适应水印算法  

An Adaptive Watermarking Algorithm for Text Based on Binary Image

作　　者：高志荣[1] 蓝雯飞[1] 

机构地区：[1]中南民族大学计算机科学学院,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2008年第1期89-92,共4页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：湖北省自然科学基金资助项目(2006ABA370)

摘　　要：针对纯文本文档在传输过程中易受到攻击的特点,提出了一种基于文本图像的纯文本自适应水印算法.通过将纯文本文档转换为二值图像,利用二值图像的连通不变性进行自适应水印嵌入,使嵌入水印的图像能保持良好的视觉质量.水印嵌入过程采用分块奇偶性和水印奇偶性相匹配的技术,能有效实现对嵌入水印的盲检测.实验结果证明了算法的可行性和稳健性.Aiming at the character of the text document being attacked in transmission, an adaptive watermarking algorithm for the text was proposed based on binary image in this paper. By converting the text into binary image, an adaptive watermark embedding is achieved by the connectivity-preserving property of binary image, in which the watermarked image could remain good vision quality. A technique of matching the parities of the partitioned block and the embedded watermark was employed in stages of watermark embedding and extracting, which efficiently realized the blind detection of watermark. Experimental results demonstrate the validity and robustness of the proposed method.

关 键 词：文本 自适应水印 二值图像 连通不变性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]