摘要
针对一数字产品的多用户问题,有必要进行不同的版权追踪。先利用一混沌序列产生多个相关性很小的二值图像作为版权水印,再选择一版权水印嵌入到数字产品中以达到对应地追踪一个用户的目的。另外,在保证产品价值不受影响的情况下,需要对攻击后的产品提取出来的水印进行版权检测。根据最小距离译码准则,从版权水印中找出该用户的原对应水印,结合信道转移概率矩阵,分析了版权水印之间的误判概率,并讨论了最佳译码准则。最后通过实验进行仿真,验证了算法的有效性。
Referring to the problem of single numerical product for multi-user,it is necessary to execute a different copyright track among users.At first,a chaos sequence is used to produce some uncorrelated binary images as copyright watermarks.Then a copyright watermark will be embedded into a digital product so as to track a corresponding user.Moreover,when the value of the product is preserved,it need do a copyright examination of the watermark extracted from the attacked product for a copyright track.According to the principle of minimum distance decoding,the original copyright watermark to the corresponding user is detected.With the establishment of the channel transition probability matrix,the probability of misjudgement among the copyright watermarks is analyzed and the best decoding principle is discussed.At last,experimental simulations are presented to demonstrate the expected effects.
出处
《重庆理工大学学报（自然科学）》
CAS
2010年第4期105-111,共7页
Journal of Chongqing University of Technology：Natural Science
基金
重庆市自然科学基金资助项目(2008BB2070)
关键词
混沌
多用户水印
版权追踪
误判仿真
multi-user watermark
copyright track
analysis of simulation
作者简介
作者简介：杨倩（1986-），女，重庆人，硕士研究生，主要从事图像数字水印研究。
