摘要
对数字水印检测技术中的相关系数进行研究分析,得到了水印检测器误码率与相关系数之间的关系式,推导出误码率与错误概率之间的关系式,能够直接通过控制关系式中的误码率取值来确定检测阈值和错误概率值。并据此提出一种新的计算检测系数的方法,对比实验结果表明,该方法增强了检测器对正确水印数据的响应。
The correlation coefficient is researched in digital watermark algorithm. The relaticon between the correlation coefficient and the bit error rates of watermark detection is found. The detection threshold and wrong probability can be calculated out directly by the relation. Furthermore, a method to calculate detection coefficient is proposed. This method can increase the threshold of detection while keeping the probability of the false detection not to change and can enable the detection to strengthen the responses of the correct watermark data.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第3期566-568,共3页
Journal of University of Electronic Science and Technology of China
关键词
相关系数
检测阈值
数字水印
错误概率
correlative coefficient
detective threshold
digital watermark false-detection probability
