Abstract: This paper presents an attacking scheme on digital watermark based on changing energy distribution of frequency domain. The image embedded with digital watermark is decomposed by performing 1-level wavelet transformation, then the energy distribution of frequency domain is changed. Therefore the designer can not pick up the digital watermark, and the attacks can be achieved. Since human visual system (HVS) is considered attack in the quality of the attacked image is hardly affected.

Key words: Frequency domain attack, Digital watermark, Haar transformation

摘要： 提出了一种通过改变频域能量分布的数字水印攻击方法，即对嵌入水印的图像进行一级小波变换，改变变换后的频域能量分布，使得数字水印设计者无法正确提取水印，达到攻击的目的。此种攻击方法考虑了人类视觉系统(Human Visual System, HVS)特性，因此图像受到攻击后，质量不会受到太大影响。

关键词: 频域攻击, 数字水印, 哈尔变换

CLC Number: 

• TP391.41