扩频技术在数字图像水印技术中的应用及分析

数字水印技术作为数字产品版权保护的一种新技术,已受到越来越多的关注.为了提高水印的安全性,把扩频技术应用到数字水印中,分析了扩频技术的原理及优点.最后通过实验证明,该方法对剪裁、JPEG压缩和噪声等图像退化处理均具有一定的抵抗力,是一种行之有效的水印嵌入方法.

Application of the spread spectrum to the digital wartermaking

As a new technique applying to protecting the copyright of digital products,the digital watermark technique has drawn extensive attention. For the sake of improving the security,this paper applys the spread spectrum technique to the digital wartermarking,analyzing its theory and its excellency. Finally, experimental results have proved that the method is robust enough to some image degradation process such as cropping, JPEG compression and noise etc. So it is effective.