主要包括滤波器的相关知识及仿真软件MATLAB的相关知识。如巴特沃斯（Butterworth）滤波器、切比雪夫（Chebyshev）滤波器、椭圆（Ellips）滤波器、贝塞尔（Bessel）滤波器.模拟低通滤波器系统函数确定模拟高通滤波器系统函数的方法-Mainly includes filter related knowledge and simulation software MATLAB related knowledge. Such as Butterworth (Butterworth

关于IIR椭圆滤波器的matlab源代码有案件涉及到椭圆滤波器高通滤波器和低通滤波器的环境-About IIR elliptic filter MATLAB source code there are cases involving high-pass filter and low-pass filter in elliptic filter environment

带通滤波器（Butterworth、椭圆、窗函数），采样率fs＝2000Hz, 通带范围为300 -600Hz，阶数自选, 画出频率响应并分析比较， 对cameraman.tif图像分别添加椒盐噪声（密度为0.03）和高斯白噪声（均值为0，方差为0.02）的图像，利用三种方法进行去噪，显示原始图像、加噪图像和去噪图像并对实验结果进行分析(Band pass filter (Butterworth, ellipse, window function), sampling rate FS = 20