包含理想低通滤波、巴特沃斯低通滤波和高斯低通滤波程序。并且每个程序包含两个不同截止频率的滤波器。-Including ideal low-pass filtering, Bartworth low-pass filtering and Gaussian low-pass filtering procedures. And each program contains two different cutoff frequency filters.

输出不同截止频率的滤波图像和不同截止频率的滤波图像的幅度谱。(Different filter images are output for different cutoff frequencies.)