一种基于抖动和混沌技术的数字图像篡改检测及修复算法  

A novel image authentication and recovery algorithm based on dither and chaos

作　　者：王兴元[1] 张继明[1] 

机构地区：[1]大连理工大学电子信息与电气工程学部,大连116024

出　　处：《物理学报》2014年第21期53-60,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61370145;61173183;60973152);高等学校博士学科点专项科研基金(批准号:20070141014);辽宁省高等学校优秀人才支持计划(批准号:LR2012003);辽宁省自然科学基金(批准号:20082165);中央高校基本科研基金(批准号:DUT12JB06)资助的课题~~

摘　　要：本文提出了一种基于抖动和混沌技术的数字图像篡改检测及修复算法.该算法使用小波变换后的低频子图和抖动技术生成图像的认证及修复信息,在有效减少水印数据量的同时,将水印嵌入小波变换后的高频子图,从而达到水印的不可见性.运用混沌技术完成水印的嵌入和加密,并结合中国余数定理,进一步减少水印嵌入对图像质量的影响.实验证明,该算法兼顾了水印的不可见性和鲁棒性,并且能够一定程度修复篡改图像,在图像认证和修复方面具有较高的实用意义.This paper presents a digital image tamper detection and recovery algorithm, which uses the dither and chaos technology. Certification of generated image and the repair information gained by low frequency sub-diagram and dither technology after wavelet transform can effectively reduce the amount of data. At the same time, the watermark is embedded in high frequency sub-diagram, so as to make the watermark invisible. Chaos technology is used to complete watermark embedding and encryption; and combined with the Chinese remainder theorem, the impact on the image quality can further be reduced. Experimental results show that the algorithm＇s watermark has high invisibility and robustness, and also can repair tampered images. So it has a high practical significance in the image authentication and recovery.

关 键 词：图像认证 图像修复 抖动 混沌 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP309[自动化与计算机技术—计算机科学与技术]