傅里叶变换之低通滤波
作者:互联网
滤波是傅里叶变换的一个主要应用,因为在频域中可以更好的理解图像以及了解如何对它进行处理。
以下是低通滤波的matlab实现:
function output = low_filter(image,value) %Retain centred transform components inside circle of radius % % Usage: new image = low_filter(image,number) % % Parameters: image - array of points % value - radius of filter %get dimensions [rows,cols]=size(image); %filter the transform for x = 1:cols %address all columns for y = 1:rows %address all rows if (((y-(rows/2))^2)+((x-(cols/2))^2)-(value^2))>0 output(y,x)=0; %discard components outside the circle else output(y,x)=image(y,x); %and keep the ones inside end end end
标签:rows,end,image,之低,value,cols,filter,傅里叶,通滤波 来源: https://www.cnblogs.com/qianyuesheng/p/15003119.html