基于感兴趣区域的图像认证与自恢复算法

A Self-recovery Algorithm Based on Region of Interest

提出了一种基于感兴趣区域的图像认证与自恢复算法，该算法将图像分为两部分：感兴趣区域和背景区域．算法首先利用了基于4×4分块的编码算法对感兴趣区城进行编码，然后通过映射函数将此码流嵌入到背景图像的离散余弦变换系数中．实验表明该算法可以对整幅图像进行完整性认证，同时对被恶意篡改的感兴趣区域也能很好地恢复原来信息．

A self-recovery algorithm based on region of interest is proposed in this pa-per.This algorithm divides a host image into two parts:region of interest and region ofbackground.The region of interest is coded based on 4×4 blocks,and the codes are thenembedded into the DCT coeffcients of the region of background by a novel mapping func-tion.Experimental results indicate that this scheme can authenticate the whole image,atthe same time,if the region of interest is tampered maliciously,the scheme can recover theoriginal content with good quality.