一种基于DWT的数字水印分存算法  

A Digital Watermarking Sharing Algorithm Based on DWT

作　　者：朱建忠[1] 姚志强[1] 

机构地区：[1]福建师范大学数学与计算机科学学院,福建福州350007

出　　处：《福建师范大学学报（自然科学版）》2004年第2期36-40,共5页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金资助项目(A0210016);福建省教育厅基金资助项目(JA03028)

摘　　要：改进DCT域中的数字水印分存算法,提出了一种在DWT域中利用多数字基整数实现的数字水印分存算法.该算法中,水印嵌入的强度由DWT域中的临界可见误差(JND)门限自适应调节,保证了水印的不可觉察性.实验证明,该算法在抵抗图像压缩、图像剪切等数字图像处理方面具有良好的稳健性.Recently, a few of digital watermarking sharing algorithms based on DCT are accomplished in some literatures.An improved digital watermarking-sharing algorithm based on DWT is presented. The watermark is embedded in DWT domain with multiple-based number. Based on just noticeable difference thresholds in DWT domain, the watermark's strength is controlled dynamically without exceeding the thresholds. Hence, the transparency of the watermark can be guaranteed. Experimental results show that the proposed technique has good robustness to common image processing such as Gaussian noise, JPEG compression, cropping etc.

关 键 词：离散小波变换 临界可见误差门限 多数字基整数 数字水印 数据分存 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]