MEAN FILTER IN MATLAB PROGRAM

/*CSEMATTER.BLOGSPOT.IN
PROGRAM FOR MEAN FILTER IN MATLAB*/


A = imread('atul1.jpg');
A=imresize(A,[300,300]);
A = rgb2gray(A)
figure,imshow(A),title('ORIGINAL IMAGE');

modifyA=zeros(size(A)+2);
B=zeros(size(A));
        for x=1:size(A,1)
            for y=1:size(A,2)
                modifyA(x+1,y+1)=A(x,y);
            end
        end
   
for i= 1:size(modifyA,1)-2
    for j=1:size(modifyA,2)-2
        window=zeros(9,1);
        inc=1;
        sum=0;
        for x=1:3
            for y=1:3
                window(inc)=modifyA(i+x-1,j+y-1);
     
                sum=sum+window(inc);
                inc=inc+1;
            end
        end
       sum=sum/9;
        B(i,j)=sum;
     
    end
end
B=uint8(B);
figure,imshow(B),title('IMAGE AFTER MEAN FILTERING');