i am doing project on sclera based authentication , first step of project is to detect region of interest ,in my case region of interest is sclera part(white),i used following code to select region of interest but the problem is that i am not getting desired output also the output which i got has noise which i tried to remove using filter which made my image blurry. i am attaching my code , i am attaching two images
A.output which i got
if true
clc;
clear all;
close all;
I = imread('yo4.jpg');
imageSize = size(I);
row=imageSize(1);
col=imageSize(2);
figure,subplot(3,2,1);
imshow(I);
title('ORIGINAL IMAGE');
I1=rgb2gray(I);
subplot(3,2,2);
imshow(I1);
J=I1;
for i=1 :row
for j=1 :col
if (J(i,j)>180 )
O(i,j)=J(i,j);
end;
end;
end;
H=fspecial('average',[5 5]);
O=imfilter(O,H,'replicate');
for i=1 :row
for j=1 :col
if (O(i,j)>180 )
Ex(i,j)=I(i,j);
end;
end;
end;
subplot(3,2,3);
imshow(Ex);
title('region of interest');
K=medfilt2(Ex,[13 13]);
subplot(3,2,4);
imshow(K);
title('after applying median filter');
end
what changes i should make to get desired output.
