一种改进的小波变换图像数字水印技术研究  

An Improved Wavelet Transforms Image Digital Watermarking Technology

作　　者：刘亮[1] 陈昌志[1] 孙浩[1] 

机构地区：[1]重庆邮电大学移通学院,重庆400065

出　　处：《科技通报》2012年第6期144-145,148,共3页Bulletin of Science and Technology

摘　　要：数字水印技术一直是国内外研究的热点重点问题,本文介绍了数字水印技术的基本原理,提出一种改进的小波变换图像数字水印技术。首先采用离散二维小波分解和重构算法对图像进行分解重构,利用图像置乱算法和小波域低中频系数进行图像水印加载、嵌入与提取。实验结果表明,本文提出的算法具有良好的鲁棒性能,有效地保障了图像的安全。digital watermarking technology has been a research hot point problem,this paper first introduces the basic concepts of digital watermarking,put forward a kind of improved wavelet transform of image digital watermarking technology.The algorithm employs two-dimensional discrete wavelet decomposition and reconstruction algorithm of image decomposition and reconstruction,using image scrambling algorithm for image watermarking in wavelet domain is loaded,then the use of low frequency coefficients of the image watermark embedding and extraction.The experimental results indicate that the proposed crime has good robust performance,and effective protection of the image security.

关 键 词：数字水印 图像处理 小波变换 置乱算法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]