计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2009年
22期
125-127
,共3页
文家福%王嘉祯%刘爱珍%刘会英
文傢福%王嘉禎%劉愛珍%劉會英
문가복%왕가정%류애진%류회영
图像认证%可逆数字水印%差值扩展%纠错编码
圖像認證%可逆數字水印%差值擴展%糾錯編碼
도상인증%가역수자수인%차치확전%규착편마
image authentication%reversible digital watermark%difference expansion%error correction code
针对一些敏感数字图像在认证水印嵌入过程中不能引入失真的问题,提出一种能够定位图像篡改块的可逆图像认证方案,利用纠错编码使认证数据能抵抗可能受到的篡改攻击,并用差值扩展的方式将编码后的认证数攒嵌入到图像中.仿真实验结果表明,若认证通过,则图像可完拿恢复到原始状态,否则,图像中篡改的块可被定位,并完全恢复其他未篡改的区域.
針對一些敏感數字圖像在認證水印嵌入過程中不能引入失真的問題,提齣一種能夠定位圖像篡改塊的可逆圖像認證方案,利用糾錯編碼使認證數據能牴抗可能受到的篡改攻擊,併用差值擴展的方式將編碼後的認證數攢嵌入到圖像中.倣真實驗結果錶明,若認證通過,則圖像可完拿恢複到原始狀態,否則,圖像中篡改的塊可被定位,併完全恢複其他未篡改的區域.
침대일사민감수자도상재인증수인감입과정중불능인입실진적문제,제출일충능구정위도상찬개괴적가역도상인증방안,이용규착편마사인증수거능저항가능수도적찬개공격,병용차치확전적방식장편마후적인증수찬감입도도상중.방진실험결과표명,약인증통과,칙도상가완나회복도원시상태,부칙,도상중찬개적괴가피정위,병완전회복기타미찬개적구역.
Aiming at the problem that some sensitive digital images can not bring in inevitably distortion in the process of authentication data embedding, a reversible image authentication scheme with tampering localization is proposed. In this scheme, authentication data is encoded using error correction code to prevent them from malicious manipulation and difference expansion is exploited to conceal the encoded data into image. Simulation experimental results demonstrate that if the image is authentic, the distortion due to embedding can be completely removed from the original state, otherwise, the tampered blocks can be located and other areas can be restored,
