中文说明：这是一个自己写的MATLAB低通滤波程序，用于滤去图像中的高频噪声。该程序中用的是圆形的滤波结构元素，可以通过自己的需要调节半径，结合傅里叶变换，将图相转化到频域滤波。
English Description：
It was written by a MATLAB filtering programs used to filter high frequency noise in an image. Filtering element of this program is rounded, RADIUS is regulated by their own needs, combined with the Fourier transform, the image is transformed to the frequency domain filtering.