数字图像水印的扩频实现

文中从扩频角度提出了数字图像水印的相关特性,用类比的方法建立了数字图像水印和信道扩频通信系统之间的联系,并给出了数字图像水印的通信系统模型。着重对两者在信道容量、信噪比、干扰容限和处理增益等方面的相似和联系作了分析与评价,以期作为数字图像水印技术研究、设计的参考。最后结合扩频通信编码技术实现了一个基于ｍ－序列的,可以进行盲检测的图像空间域数字水印方案。

Spread spectrum realization of digital image watermarking

In this paper, some related characteristics of the digital image watermarking in the view of spread spectrum are put forward, and the relation between the digital image watermarking and channel spread spectrum communication system by means of analogy is established. At the same time the communication system model of digital image watermarking is presented. It is emphatically analyzed and evaluated for the simularity and relations on the aspects of channel capacity, signal-to-noise ratio, jamming margin and processing gain, for the sake of reference direction to the research and design of digital image watermarking technology. Finally, a digital image watermarking scheme based on spatial image domain is realized in combination with the spread spectrum communication coding technology.