摘要
现在人们已经研究出了很多种数字水印的算法,其中将数字水印嵌入到变换域中的算法占了很大一部分。它们的检测方法基于统计特性的阈值的。但是,当嵌入水印的图像受到一些“攻击”,如附加噪声,JPEG压缩等时,利用阈值的检测方法效率会大大降低。本文中在利用相关检测图的基础上,提出了一种提高阈值检测性能的改进算法,经过实验的验证,这种方法大大提高了阈值检测的性能。
A great number of digital watermarking appraches do exist, but it seems that transform domain watermarking
dominates the field. The detection of such schemes is based on thresholds extracted by statistic rules on which the method relies.
In this work, we propose an improved detector for such techniques. It extends the traditional schemes by taking into account the
similarity diagrams that are widely used until now as an evidence of the watermarks existence and uniqueness.
出处
《信号处理》
CSCD
2004年第3期290-293,共4页
Journal of Signal Processing
