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<BODY><PRE>%Question No: 2
%Take a noisy image. Write a MATLAB function which reduces the noise by
%averaging the input image by 2, 8, 16, 32 and 128. Compare all the
%resulting images and find which is noise free.
function noisereduct(x)
f=imread(x);
[M,N]=size(f);
f=im2double(f);
A=zeros(M,N);
no=input('Enter the number of noisy images to be considered : ');
d=0.01;
for i=1:no
A=A+imnoise(f,'salt & pepper',d);
d=d+.004;
end
A=A/no;
figure, imshow(f),title('Original Image');
figure,imshow(A),title('Image After Noise Reduction');</PRE></BODY></HTML>
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