matlab image denoising

What filter are you trying to use , I have a program here that uses both mean and median:

g=imread('E:\1.jpg'); %Read the exact location of the image,

v=imnoise(g,'salt & pepper',0.1);

subplot( 2,2,1);

imshow(g)

title('orginal image');

subplot(2,2,2);

imshow(v)

title('noise image');

[h,w]= size(v);

n=9;

f=double(v);

a=ones(n,n);

y=f;

for i=1:h-n+1

for j=1:w-n+1

a=f(i:i+(n-1),j:j +(n-1));

s=sum(sum(a));

y(i+(n-1)/2,j+(n-1)/2)=s/(n*n);

end

end

subplot(2,2,3);

imshow(uint8(y ))

title('noise reduction by average filter');

x=f;

for i=1:h-n+1

for j=1:w-n+1

c=f(i:i+(n-1),j:j+(n-1));< /p>

e=c(1,:);

for u=2:n

e=[e,c(u,:)];

end

mm=median(e);

x (i+(n-1)/2,j+(n-1)/2)=mm;

end

end

subplot(2,2,4);

imshow(uint8(x))

title('noise reduction by median filter');