电子学报 ›› 2005, Vol. 33 ›› Issue (7): 1187-1190.

• 论文 • 上一篇    下一篇

基于差错控制编码的水印检测

许文丽, 王育民   

  1. 西安电子科技大学ISN国家重点实验室,陕西西安 710071
  • 收稿日期:2004-04-17 修回日期:2005-05-17 出版日期:2005-07-25 发布日期:2005-07-25

Watermark Detection Based on Error Control Codes

XU Wen-li, WANG Yu-min   

  1. 1. ,China
  • Received:2004-04-17 Revised:2005-05-17 Online:2005-07-25 Published:2005-07-25

摘要: 提出了一种基于差错控制编码(ECC)的水印检测方法,并且依据编码原理提出了进行水印检测的门限值的确定方法.基本思想是利用ECC对原始水印信息进行编码,水印检测时把提取出的待测编码水印与反馈水印进行比较,将其差值与设定的门限值进行比较,从而来判断水印存在与否.实验是基于DWT,采用的是ECC的Turbo码进行水印检测.仿真结果表明,该方法大大减少了水印图像在传输中的错误,水印的鲁棒性得到了极大的提高.

关键词: 差错控制编码, 水印检测, Turbo码

Abstract: In this paper,a method for watermark detection based on error control codes and a method for determining threshold for watermark detection are proposed.The basic idea is that watermark be encode with ECC,and then the extracted watermark subtract the feedback one,finally compare the subtractive result with the threshold selected for watermark detection.Thus the existence or not of watermark can be detected.The Turbo code of error control codes is used in the experiment.The simulation results using an algorithm based on DWT show that the errors of watermark image presented during the transportation is reduced greatly and the robustness of it is enhanced with the method proposed.

Key words: error control codes, watermark detection, Turbo code

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