摘要
文中提出了一种基于盲源分离的大容量图像数字水印算法.将水印像点所对应的序列依次叠加到图像小波系数中,以增加水印的容量;同时,根据视觉最小可察觉误差值,限制水印最大强度,实现了水印的不可见性.运用基于独立分量分析的盲源分离方法,在水印的嵌入方式和水印强度未知的情况下,将水印和图像数据进行盲分离以获取水印.通过测试,该算法是有效性的.
In this paper, a high-capacity image watermarking algorithm based on Blind Source Separation is proposed. In order to increase the capacity of watermarking, the corresponding sequences of watermarking pixels are added into the wavelet coefficients respectively. And the maximum strength of watermarking is limited according to Just Noticeable Difference of visual in order to assure the watermarking invisibility. By using the Blind Source Separation based on Independent Component Analysis, the watermarking is separated with the image data and obtained regardless of the method of watermarking embedment and watermarking strength. The efficiency of the algorithm is confirmed by the experimental test.
出处
《南通大学学报（自然科学版）》
CAS
2008年第1期31-36,共6页
Journal of Nantong University(Natural Science Edition)
关键词
数字水印
独立分量分析
盲源分离
图像处理
digital watermarking
Independent Component Analysis
Blind Source Separation
image precessing
