智能化焦距仪中线阵CCD信号的小波平滑方法

Wavelet transform for CCD's signal smoothing

由于CCD本身的散粒噪声以及外界环境的影响,采集到的信号往往有一定程度的失真和变形,存在许多“毛刺”,不利于数据的计算和分析。本文采用3次B样条小波对原始信号进行分解,对分解后的数据进行平滑处理,最后重构得到平滑信号。本文最后给出了对比试验结果以证明方法的有效性。

To collect the signal by using CCD,the signal will distort to some extent for some interference such as shot noise, instability of signal , magnetic interference. It is harmful for computation and analysis. A smoothing method using 3-B spine wavelet is discussed in this paper. The original signal is decomposed into two parameters and the process is applied in one parameter. The smoothed signal is gained after reconstruct the signal based on the processed data.Finally, some examples are given to prove the validity of the method.