一种基于DCT随机选块的图像数字水印算法

Arithmetic on Digital Watermarking of Image Based on DCT-block by Selected Random

基于保护静态图像的目的 ,分析了扩展频谱通信和NEC数字水印算法的实现技术 ,通过扩充宿主图像频谱和随机选取DCT块 ,提出了在宿主图像的子频域中嵌入微量水印位标识的方法 ,构造和设计了一种嵌入和提取数字水印标识的算法 。

Based on protect image,a technology of communicating with spread spectrum and arithmetic of digital watermarking is analysed,by spread spectrum for host image and random selected DCT block, show a method that stochastic embedding a few ID with watermarking bits,then made and design a arithmetic on embedding and gathering ID of it,show a set of testing data,or example on it's validity at end.