Finally, making use of autocorrelation function characteristic of spread spectrum sequence, watermark information was detected. In the detection process, it is not requisite for initial carrier image.
最后利用扩频序列的自相关函数特征检测出水印信息，检测过程中不需要原始载体图像。
2
The autocorrelation function of the randomly staggered pulse sequence is derived, and its power spectrum is given. Comparison with constant pulse-repetition frequencies pulse sequence is also made.
推导了随机脉位脉冲序列的自相关函数，给出了其功率谱，并与均匀脉冲串的功率谱进行了分析比较。
3
Shenzhen stock market has qualified the weak-form efficiency. Autocorrelation of the time sequence tests show that the time sequence of stock return is correlative.