基于扩频技术的图像盲水印  

Blind watermarking based on spread spectrum technique

作　　者：胡玉平 王锡文[2] 

机构地区：[1]娄底师范专科学校计算机系 [2]娄底职业技术学院计算机系,湖南娄底417000

出　　处：《信阳师范学院学报（自然科学版）》2003年第2期221-224,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家"八六三"高技术研究发展计划资助项目(863-317-01-10-99)

摘　　要：在分析数字水印和扩频通信联系的基础上,提出了一种基于扩频技术的盲水印方法.该方法使用宿主图像的两块DCT变换系数块中嵌入一位水印信息,通过量化使它们呈现足够大的统计差别,从而使水印检测时能提取水印信息.实验结果表明:该方法水印有较好的不可视性和鲁棒性,检测水印的虚警概率很低.The relation between the digital watermarking and spread spectrum communication is analyzed at first ,then a blind watermarking method based on spread spectrum technique is put forward. With this method, each watermark bit is embedded using two DCT coefficient blocks of host image, The blocks are so quantized that they exhibit a large enough statistical difference which will later be used for watermark extraction. Experiment results show that the watermarking is invisible and robust and that the checking probability of false positive error is very low in this proposed scheme.

关 键 词：数字水印 扩频通信 扩频技术 DCT变换 图像盲水印 图像处理 扩频调制 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN914.42[自动化与计算机技术—计算机科学与技术]