去除图片高斯噪声和椒盐噪声（图像处理）

最小值最大值中值均值滤波去除高斯噪声和椒盐噪声

#代码如下：

clear;clc;
f=imread(‘rice.png’);
f1=imnoise(f,‘gaussian’);
f2=imnoise(f,‘salt & pepper’,0.02);
[m,n]=size(f1);
g1=f1;
g2=f2;
mask=[1 1 1;1 1 1;1 1 1]/9;
for x=2:m-1
for y=2:n-1
subimage=double(f1(x-1:x+1,y-1:y+1));
temp=subimage.*mask;
g1(x,y)=round(sum(sum(temp)));
subimage2=double(f2(x-1:x+1,y-1:y+1));
temp2=subimage2.*mask;
g2(x,y)=round(sum(sum(temp2)));
end
end
g1=uint8(g1);
g2=uint8(g2);
subplot(221),imshow(f1);
subplot(222),imshow(f2);
subplot(223),imshow(g1);
subplot(224),imshow(g2);

clear;clc;
I=imread(‘rice.png’);
f1=imnoise(I,‘gaussian’);
f2=imnoise(I,‘salt & pepper’,0.02);
[m,n]=size(f1);
g1=f1;
g2=f2;
mask=[1 1 1 1 1;1 1 1 1 1;1 1 1 1 1;1 1 1 1 1;1 1 1 1 1]/25;
for x=3:m-2
for y=3:n-2
subimage=double(f1(x-2:x+2,y-2:y+2));
temp=subimage.*mask;
g1(x,y)=round(sum(sum(temp)));
subimage2=double(f2(x-2:x+2,y-2:y+2));
temp2=subimage2.*mask;
g2(x,y)=round(sum(sum(temp2)));
end
end
g1=uint8(g1);
g2=uint8(g2);
subplot(221),imshow(f1);
subplot(222),imshow(f2);
subplot(223),imshow(g1);
subplot(224),imshow(g2);

I = imread(‘pout.tif’);
f1=imnoise(I,‘gaussian’);
f2=imnoise(I,‘salt & pepper’,0.02);
[m,n] = size(I);
g1=f1;
g2=f2;
mask=[1 1 1 1 1;1 1 1 1 1;1 1 1 1 1;1 1 1 1 1;1 1 1 1 1 ]/25;
for x=3:m-2
for y=3:n-

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