基于分块能量模量化的鲁棒水印算法

论文提出了一种鲁棒水印算法,在DCT域中对包括直流分量在内的分块能量进行模量化,将水印信息调制到量化所得到的余数上。通过研究DCT分块嵌入系数的选择及降低块效应的对策,得出了对DCT直流分量进行模量化嵌入可以有效降低或者避免块效应的结论。实验显示本算法在对抗Jpeg压缩、加噪及剪切等攻击时具有较好的鲁棒性,是有效可行的。

A Robust Watermarking Algorithm Robust Watermarking Algorithm Based on Quantized Module Modulation of Block Energy

In this paper,a novel watermarking algorithm based on quantized module modulation (QMM) was put forward,which modulates the watermarking information to a residue gained by quantizing the block's energy with a module.We study the selection area of DCT coefficients embedded with watermarking information and draw the conclusion that blocking effect can be decreased or avoided by embedding in the block energy properly,including the DC energy.Experi-ments have showed that the algorithm is robust and effectual while counterworking the attack such as JPEG compression,adding noise,clipping and so on.