低通滤波的matlab实现(共7页).doc

精选优质文档-倾情为你奉上四种低通滤波器：一、理想低通滤波器I=imread(bb.jpg);T=rgb2gray(I);figure(1);subplot(1,2,1),imshow(uint8(I);title(原图像);subplot(1,2,2),imshow(uint8(T);title(理想低通滤波所得图像);f1,f2=freqspace(size(T),meshgrid);H=ones(size(T);r=sqrt(f1.2+f2.2);H(r0.1)=0;Y=fft2(double(T);Y=fftshift(Y);Ya=Y.*H;Ya=ifftshift(Ya);I=ifft2(Ya);figure(2);surf(H,Facecolor,interp,Edgecolor,none,Facelighting,phong);title(频谱图); 二、巴特沃斯低通滤波