Find perimeter of objects in binary image | Digital Image Processing | MATLAB

Code:
clc
clear all
close all
warning off
imshow(x);
title('Original Image');
se=ones(3,3);
sq=imerode(x,se);
figure;imshow(x-sq);
title('Perimeter Extraction using own code');
figure;imshow(bwperim(x));
title('Perimeter Extraction using MATLAB inbuilt function');
figure;imshow(abs((x-sq)-bwperim(x,8)));
title('Difference between 2 extracted perimeters');

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