首页 | 本学科首页   官方微博 | 高级检索  
     

基于多通道的彩色图像水印方案
引用本文:李晓强,薛向阳.基于多通道的彩色图像水印方案[J].计算机学报,2004,27(9):1238-1244.
作者姓名:李晓强  薛向阳
作者单位:1. 复旦大学计算机科学与工程系,上海,200433;上海大学计算机工程与科学学院,上海,200072
2. 复旦大学计算机科学与工程系,上海,200433
基金项目:国家自然科学基金 (60 0 0 30 1 7),国家“八六三”高技术研究发展计划项目基金 (2 0 0 1AA1 1 4 1 2 0 ,2 0 0 2AA1 0 30 65)资助
摘    要:空域水印算法的特点是鲁棒性较差.针对这个问题,该文提出了一个基于多通道的彩色图像水印方案:利用发送分集技术的思想,把相同的水印信息经过伪随机调制、交织编码后嵌入到彩色图像的红、绿、蓝三个颜色通道,然后使用两种简单方案提取水印信息,降低了误码率.该文从理论上定性地分析了算法的有效性,同时用大量实验结果表明,该算法在提高水印容量的前提下,改善了彩色图像中传统空域水印方案的鲁棒性,并且水印提取算法的计算量较小,可应用于实时视频水印方案中.

关 键 词:数字水印  彩色图像  发送分集技术

Multi-Channel Based Watermarking Scheme for Color Image
LI Xiao-Qiang , XUE Xiang-Yang.Multi-Channel Based Watermarking Scheme for Color Image[J].Chinese Journal of Computers,2004,27(9):1238-1244.
Authors:LI Xiao-Qiang  XUE Xiang-Yang
Affiliation:LI Xiao-Qiang 1),2) XUE Xiang-Yang 1) 1)
Abstract:This paper presents a new watermarking technique in spatial domain expressly devised for color images, which is based on the theory of transmit diversity techniques, considering the RGB image as three independent slowly fading channels. Modulated by different Pseudo-random sequences and interleavers respectively, the same watermark in different form is put into three color channels simultaneously. This scenario makes up the weakness in single color channel schemes that single color channel is prone to severe fading. Ahthors use two extraction methods to improve accuracy of decision. Theory analysis and experimental results demonstrate the validity of the new approach compared with algorithms operating on single color channel, explicitly lower bit error rate in most cases. Contrast to the present spatial watermarking schemes, this algorithm is considerably robust to many intentional and unintentional attacks. Moreover, information can be extracted in real time without the original image so that this scenario can be applied in video watermarking.
Keywords:digital watermarking  color image  transmit diversity technique  
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号