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denoiseSBMF.m
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denoiseSBMF.m
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function [ output_image ] = denoiseSBMF( input_image )
% SBMF
% denoising algorithm
% implementation: Ashutosh Singla
%
% input_image: grayscale image
%
% ouput_image: grayscale image
% denoised image
[row col]=size(input_image);
for i=2:row-1
for j=2:col-1
array=zeros(1,9);
m=1;
for k=i-1:i+1
for l=j-1:j+1
array(1,m)=input_image(k,l);
m=m+1;
end
end
check=array(1,5);
array=sort(array);
if((check==255)||(check==0))
for z=1:9
if(array(1,z)==255)
if(array(1,z-2)==0)
array(1,z)=array(1,z-1);
else
array(1,z)=array(1,z-2);
end
end
end
for z=9:-1:1
if(array(1,z)==0)
if(array(1,z+2)==255)
array(1,z)=array(1,z+1);
else
array(1,z)=array(1,z+2);
end
end
end
array=sort(array);
med=array(1,5);
input_image(i,j)=med;
end
end
end
output_image = input_image;
end