图像增强代码.rar_thumbsu4_图像增强_图像增强 matlab_图像增强代码_图像增强技术

clear all; close all; I=imread('coins.png'); I=imnoise(I, 'gaussian', 0, 0.01); I=im2double(I); M=2*size(I,1); N=2*size(I,2); u=-M/2:(M/2-1); v=-N/2:(N/2-1); [U,V]=meshgrid(u, v); D=sqrt(U.^2+V.^2); D0=50; W=30; H=double(or(D<(D0-W/2), D>D0+W/2)); J=fftshift(fft2(I, size(H, 1), size(H, 2))); K=J.*H; L=ifft2(ifftshift(K)); L=L(1:size(I,1), 1:size(I, 2)); figure; subplot(121); imshow(I); subplot(122); imshow(L);