摘要
提出了一种基于小波域的容量自适应数字图像水印算法,从小波量化出发,对可嵌水印位置进行选择。在此基础上,结合人眼视觉模型和图像纹理特性,得出小波域的水印最大可嵌强度,用修改极性的方法进行水印的嵌入和提取。仿真结果表明,该算法不仅具有较好的不可视性和鲁棒性,而且在保证这些性能的基础上实现了自适应容量,较好地协调了水印三要素间的关系。
An algorithm of capacity adaptive digital image watermark based on wavelet quantity was put forward. First, from the principle of wavelet quantity, the embedding positions could be selected. Then, the maximum watermark amplitude was obtained by using the human vision system and image feature. At last, a simple amending polarity method was used to embed and extract the watermark. The simulation results show that this algorithm has good invisibility and robustness, and has realized the adaptive capacity. Thus, the relationship among the invisibility, robustness and capacity has been well balanced.
出处
《交通与计算机》
2007年第1期136-138,共3页
Computer and Communications
关键词
水印容量
人眼视觉模型
水印算法
压缩攻击
watermark capacity
human vision system
watermark algorithm
compression attack
