数字滤波器，实现高通和低通滤波，程序绝对是最简单的哈哈。-Digital filter, high pass and low pass filtering, the program is the simplest Haha.

1. To design FIR filters in MATLAB to achieve various types of frequency selectivity, e.g., lowpass, highpass，bandpass, etc 2. To verify the frequency response of the designed filters in MATLAB 3. To implement the designed FIR filters using C67

1. To design IIR filters in MATLAB to achieve various types of frequency selectivity, e.g.,lowpass, highpass, bandpass, etc 2. To implement the designed IIR filters in different architectural forms (e.g., direct form vssecond-order cascade form) u

下载图片然后傅立叶变换 展示频谱 计算灰度级平均值 使用高斯低通滤波器，可以指定size,m*n，高斯函数的中心位置。 用例图做高斯低通滤波。((a)Download Fig. 4.41(a) from the book web site and compute its (centered) Fourier spectrum. (b) Display the spectrum. (c) Use your result in (a) to compute the average val