数字图像平滑滤波在MATLAB上的实现

1、图像平滑滤波在MATLAB上的实现本课程设计在MATLAB上实现的程序和结果I=imread(b.bmp;v=0.5*ones(size(I;I1=imnoise(I,localvar,v;I2=imnoise(I,salt & pepper,0.02;I3=imnoise(I,speckle,0.02;figure;subplot(221;hold on;title(原图像;imshow(I;hold off;subplot(222;hold on;title(受高斯噪声污染的图像;imshow(I1;hold off;subplot(223;hold on;title(受椒盐噪声污染的图像

2、;imshow(I2;hold off;subplot(224;hold on;title(受乘性噪声污染的图像;imshow(I3;hold off;原图像受高斯噪声污染的图像 受椒盐噪声污染的图像受乘性噪声污染的图像 h=ones(3,3/9;J1=imfilter(I1,h;J2=imfilter(I2,h;J3=imfilter(I3,h;figure;subplot(221;hold on;title(原图像;imshow(I;hold off;subplot(222;hold on;title(对有高斯噪声的3*3邻域平均后的图像;imshow(J1;hold off;subplo

3、t(223;hold on;title(对有椒盐噪声的3*3邻域平均后的图像;imshow(J2;hold off;subplot(224;hold on;title(对有乘性噪声的3*3邻域平均后的图像;imshow(J3;hold off;原图像高斯噪声3*3邻域平均后的图像 椒盐噪声3*3邻域平均后的图像乘性噪声3*3邻域平均后的图像 h1=ones(5,5/25;K1=imfilter(I1,h1;K2=imfilter(I2,h1;K3=imfilter(I3,h1;figure;subplot(221;hold on;title(原图像;imshow(I;hold off;subp

4、lot(222;hold on;title(对有高斯噪声的5*5邻域平均后的图像;imshow(K1;hold off;subplot(223;hold on;title(对有椒盐噪声的5*5邻域平均后的图像;imshow(K2;hold off;subplot(224;hold on;title(对有乘性噪声的5*5邻域平均后的图像;imshow(K3;hold off;原图像高斯噪声5*5邻域平均后的图像 椒盐噪声5*5邻域平均后的图像乘性噪声的5*5邻域平均后的图像 L1=medfilt2(I1,5,5;L2=medfilt2(I2,5,5;L3=medfilt2(I3,5,5;figu

5、re;subplot(221;hold on;title(原图像;imshow(I;hold off;subplot(222;hold on;title(高斯噪声5*5中值滤波后的图像;imshow(L1;hold off;subplot(223;hold on;title(椒盐噪声5*5中值滤波后的图像;imshow(L2;hold off;subplot(224;hold on;title(乘性噪声的5*5中值滤波后的图像;imshow(L3;hold off;原图像高斯噪声5*5中值滤波后的图像 椒盐噪声5*5中值滤波后的图像乘性噪声的5*5中值滤波后的图像 f1,f2=freqspac

6、e(25,meshgrid;Hd=zeros(25,25;d=sqrt(f1.2+f2.20.5;Hd(d=1;h=fsamp2(Hd;figure;freqz2(h,64,64;1.5 Magnitude 1 0.5 0 1 0.5 0 -0.5 Fy -1 -1 -0.5 Fx 0.5 0 1 I=imread(b.bmp; v=0.5*ones(size(I; I1=imnoise(I,localvar,v; I2=imnoise(I,salt & pepper,0.02; I3=imnoise(I,speckle,0.02; J1=imfilter(I1,h,replicate; J2=imfilter(I2,h,replicate; J3=imfilter(I3,h,replicate; figure; subplot(221; hold on; title(原图像; imshow(I; hold off; subplot(222; hold on; title(高斯噪声频域滤波后图像; imshow(J1; hold off; subplot(223; hold on; title(椒盐噪声频域滤波后图像; imshow(J2; hold