中文说明：
陷波器是一种特殊的带阻滤波器，其阻带在理想情况下只有一个频率点，因此也被称为点阻滤波器。这种滤波器主要用于消除某个特定频率的干扰,例如,在各种测量仪器和数据采集系统中用于消除电源干扰的工频陷波器。该程序实现利用陷波滤波器消除图像的电源干扰。
English Description：
Notch filter is a kind of special band stop filter, its stop band has only one frequency point in ideal case, so it is also called point stop filter. This kind of filter is mainly used to eliminate the interference of a specific frequency, such as the power frequency notch filter used to eliminate the interference of power supply in various measuring instruments and data acquisition systems. The program realizes the use of notch filter to eliminate the power interference of image