说明：  介绍了一种一般的盲水印方安，它利用周期函数的性质来消除宿主数据对提取水印的影响。经过实验证明是有效地，通用的盲水印方案
(This paper presents a blind watermarking Speaking generally, it is the nature of the use of periodic function to eliminate the host data on the impact of watermark extraction. After the experiment proved to be effective, common-blind watermarking scheme)