摘要
提出了一种基于水平集方法的多比特顽健水印算法。该算法首先利用水平集方法在图像中确定一个稳定的图像轮廓,进而确定一个位置稳定的单位圆,然后计算这个单位圆的伪Zernike矩,利用抖动量化的方法将水印嵌入伪Zernike矩的幅值上。水印的检测过程采用均方根误差法提取出水印。克服了传统基于伪Zernike矩水印算法的缺点,同时可以很好地抵抗各种几何攻击。
A multibit watermarking algorithm based on level set method was proposed.First,the stable location of the unit disk was found using level set method.Then,pseudo-Zernike moments were calculated.At last,the watermark was embedded by modifying the pseudo-Zernike moments.In the extraction process,the root-mean-square-error method was employed to detect the watermark.Simulation results show that the algorithm overcomes the defect of the traditional al-gorithm based on pseudo-Zernike moments,while be robust against geometric attacks.
出处
《通信学报》
EI
CSCD
北大核心
2011年第10期135-142,共8页
Journal on Communications
基金
国家杰出青年科学基金资助项目(61025013)
国家自然科学基金资助项目(60702013
61073159)
北京市自然科学基金资助项目(4073038)
中央高校基本科研业务费专项基金资助项目(2009JBZ006)~~
