一种基于SPIHT编码的自恢复脆弱水印算法

文章提出了基于SPIHT编码的图像自恢复脆弱水印算法,它对宿主图像进行SPIHT编码得到恢复水印,由宿主图像第三层小波变换的低频带系数的大小关系产生认证水印。对恢复水印与认证水印进行置乱与纠错编码后嵌入到原灰度图像位平面编码的低两位。通过实验仿真证明该算法能定位图像篡改的位置,且能恢复出被篡改位置的真实图像内容。

A Fragile Digital Watermarking Scheme with Abilities of Self-restoration Based on SPIHT

The paper presents a fragile watermark algorithm based on SPIHT coding,which utilizes SPIHT algorithm to compresses the host image and abtain the self-correlative watermark,and takes the relations among coefficients of low frequency of wavelet domain as the authentication watermark.It also embeds the scrambled and error-correcting coded self-correlative watermark and authentication watermarking into the latter two bit of gray level image's bit-plane code.The simulation and experiment proves that the algorithm can accurately locate the juggled position and has good ability for self-recovery.