一种新的基于小波域的灰度水印嵌入算法

数字水印技术作为数字产品版权保护的一项新技术,已受到越来越多的关注.为保证水印的鲁棒性,利用人类的视觉特性,提出一种基于离散小波变换的数字水印技术,并给出了攻击分析.分析中,采用灰度图像作为数字水印,使其具有二维信号可视化的优点.实验表明,该算法能够经受住噪声、高斯滤波、压缩、直方图均衡化、增加对比度等的处理,具有较强的鲁棒性,是一种行之有效的水印嵌入方法.

A newly watermarking algorithm with gray-level image

As a new technique used to protect the copyright of digital productions,the digital watermark technique has drawn extensive attention.A digital watermarkingalgorithm based on discrete wavelet transform(DWT) was presented according to human visual properties.Then,some attack analyses weregiven.At the same time,gray-level image was used as digitalwatermarking,which has the advantage of visualization.The experiments demonstrate that the watermarking is robust to the common signal processing techniques including compressing,noise,gauss filter, image enhancing and so on.So it is effective.