基于数字水印的二值文本图像认证算法  

Authentication Algorithm of Binary Text Image Based on Digital Watermarking

作　　者：杜青[1] 

机构地区：[1]南京工程学院计算机工程学院,江苏南京211167

出　　处：《南京工程学院学报（自然科学版）》2009年第1期16-19,共4页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：南京工程学院科研基金项目(KXJ06017)

摘　　要：提出了一种用于二值文本图像认证的脆弱型数字水印算法,该算法利用混沌对初值的极端敏感性,由混沌系统产生基于图像内容的认证水印,通过修改像素块中可非度最大的像素点的颜色将认证水印嵌入到图像中.试验结果表明,该算法具有较好的不可见性及篡改定位能力,提取水印时不需要原始图像,是一种完全盲水印方案.This paper presents a fragile watermarking algorithm used to authenticate binary text images based on the fact that chaos is strongly sensitive to initial values. By changing the color of pixels which have prior embeddability, the authentication watermarking produced by chaotic system was embedded into the images. The results indicate that the algorithm is a complete blind watermark scheme in that those watermarked images have good invisibility and tamper localization and the initial images are unnecessary when extracting watermarks.

关 键 词：脆弱数字水印 混沌 二值图像 认证 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]