一种鲁棒的彩色图像多功能水印算法  

A robust multipurpose watermarking algorithm for color images

作　　者：袁志民[1,2] 赵宝琴[1,3] 

机构地区：[1]中国人民解放军军械工程学院计算机工程系,石家庄050003 [2]河北科技大学,石家庄050018 [3]河北经贸大学,石家庄050061

出　　处：《信息技术》2009年第12期1-4,8,共5页Information Technology

基　　金：河北省自然科学基金项目(F2008000460)

摘　　要：首先转换彩色图像的颜色空间抽取相应的灰度图像,再对灰度图像进行提升小波分解,在分解过程中利用图像压缩操作,引起近半数的小波系数增大,另一半系数减小,基于系数增减特征实现版权水印和消费者数字指纹的同时嵌入,从而获得版权认证和盗版追踪的双重功能。仿真实验表明该算法具有良好的鲁棒性和不可感知性。After transforming the color image in color space to extract the gray-level image, the gray-level image is decomposed with lifting wavelet transformation. In the decomposing process, the image is compressed to cause a half of wavelet coefficients to increase and the other half to decrease. The algorithm embeds a seller＇ s copyright watermark and a buyer＇ s digital fingerprint in the same work based on this kind of coefficient characteristics, so it can be used to identify who holds the legal copyright of the work and trace the illegal reseller. The experiments show that this algorithm has good robustness and imperceptibility.

关 键 词：版权水印 数字指纹 鲁棒性 不可感知性 提升小波变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]