基于离散小波变换和边缘掩蔽的盲水印算法  

Blind Watermark Algorithm Based on DWT and Edge Mask

作　　者：苏庆堂[1] 张英俐[1] 李涛[1] 李洪国[1] 

机构地区：[1]鲁东大学现代教育技术教学部,烟台264025

出　　处：《计算机工程》2009年第11期134-136,共3页Computer Engineering

基　　金：鲁东大学科研基金资助项目(L20076101);山东省科技攻关计划基金资助项目(2005GG4201009)

摘　　要：针对图像低频区域嵌入水印后图像质量下降问题,提出一种新的基于小波变换和边缘掩蔽的盲水印算法。该算法依据人眼视觉系统的屏蔽特性和图像的部分特征决定水印的强度,利用边缘掩蔽技术决定水印在图像低频区域的嵌入和提取位置。实验结果表明,该算法实现了水印的隐形性,对常见的图像处理操作具有较强的鲁棒性。A new blind watermark algorithm based on Discrete Wavelet Transform（DWT） and edge mask is proposed to resolve the problem that the subjective image quality is degraded when watermark is embedded into low frequency area. The watermark strength is determined according to masking property in Human Visual System（HVS） and some characters of image, and the watermark location is identified by the technology of edge mask. Experimental results show that the algorithm is invisible and robust against common image processing.

关 键 词：盲水印 离散小波变换 边缘掩蔽 人眼视觉系统 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]