稳健水印的验证算法

A Robust Watermarking Authentication Algorithm

研究了稳健水印验证模型,提出一种以人类视觉掩蔽值作为量化阶的DWT域稳健水印认证算法.该算法能够区分普通的图像处理(如图像增强、压缩等)和非法纂改(如剪切攻击),而且对于一般的图像处理操作还能根据水印误差图样来判断图像经过了何种处理.最后详细论述提出的算法并给出仿真结果.

A robust watermarking authentication algorithm with the value of visual masking as the quantization size is proposed.The security of it depends on hiding keys instead of quantization steps,which can be published,so that it could avoid some security gaps when using human visual characteristics.The fundamental advantage of our technique lies in its ability to distinguish common image processing from telltale tampering,and to tell what processing the image was made for the common image processing based on the error image of watermarks.Finally discussed in detail,the proposed algorithm and simulation results are given.