兼具版权保护和内容认证彩色图像双水印算法  

A multifunctional double-watermarking algorithm of color digital image for copyright protection and authentication

作　　者：虞晓庆 李宏昌 张茂 

机构地区：[1]武警工程大学研究生管理大队,陕西西安710086 [2]武警工程大学基础部,陕西西安710086

出　　处：《电子设计工程》2012年第23期32-35,共4页Electronic Design Engineering

基　　金：国家自然科学基金项目(61103231)

摘　　要：提出了一种新的多功能彩色数字图像双水印算法。提取原始彩色图像的R、G、B3个色彩通道,在蓝色分量B的中频系数上嵌入扩频后的版权水印。再根据绿色分量G生成认证水印,嵌入在量化后的提升小波系数上,不需要考虑两种水印的嵌入顺序。实验表明,版权水印具有很好的抗剪切性,鲁棒性较强、透明性较好;认证水印可精确进行图像篡改检测和定位。A new muhifunctional double-watermarking algorithm of digital image was proposed. The original imagewas decomposed into R, G, B, three color components. Copyright watermark that modulated by sequence spread spectrumwas embedded in B component＇s intermediate frequency coefficients. Authentication watermark was embedded in lifting wavelet coefficients quantified, which was made by G component. The two kinds of watermark can be embedded at the same time or separately. The experimental results show that copyright watermark can well protect from shear transformation attack and it has good robustness and imperceptibility.The authentication watermark algorithm can realize tamper detection and location well.

关 键 词：提升小波 扩频 版权水印 认证水印 篡改定位 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]