一类数字图像篡改的被动认证

被引:17
作者
魏为民
王朔中
唐振军
机构
[1] 上海大学通信与信息工程学院
[2] 上海大学通信与信息工程学院 上海200072
关键词
数字水印; 图像认证; 篡改检测; 被动认证; 小波变换;
D O I
暂无
中图分类号
TP391.41 [];
学科分类号
080203 ;
摘要
在没有被嵌入水印也没有辅助信息可利用的前提下,针对一类特殊的图像篡改——复制遮盖篡改即遮盖的内容复制自同一幅图像中,提出一种基于小波分解的自相关检测方法.将图像划分为相互重叠的小块,提取每一个小块的小波分解低频子带作为特征向量,采用Pearson相关系数进行块相似性匹配检测.实验结果表明该方法能够抵抗图像复制部位的无缝处理,对一般的高斯噪声、低通滤波、JPEG压缩等噪声攻击具有较好的鲁棒性.
引用
收藏
页码:58 / 61
页数:4
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