Question

how I can make Average filter without built-in function for image

on matlab

Answer 1

ANSWER:

MATLAB CODE:

clc;

clear all;

close all;

a=imread('cameraman.tif');

figure, imshow(a)

an=imnoise(a,'gaussian');

[m,n]=size(an);

figure, imshow(uint8(an))

b=input('Enter Averaging Mask size: ');

z=ones(b);

[p,q]=size(z);

w=1:p;

x=round(median(w));

anz=zeros(m+2*(x-1),n+2*(x-1));

for i=x:(m+(x-1))

for j=x:(n+(x-1))

anz(i,j)=an(i-(x-1),j-(x-1));

end

end

figure, imshow(uint8(anz))

sum=0;

x=0;

y=0;

for i=1:m

for j=1:n

for k=1:p

for l=1:q

sum= sum+anz(i+x,j+y)*z(k,l);

y=y+1;

end

y=0;

x=x+1;

end

x=0;

ans(i,j)=(1/(p*q))*(sum);

sum=0;

end

end

figure, imshow(uint8(ans))

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Run the code
will ask you to input the value of averaging mask.

enter 3 if you want to use 3*3
enter 5 if you want to use 5*5