source code analisa bentuk

% Rahmat Robi Waliyansyah, M.Kom
% Website: robiinformatikaupgris.wordpress.com
% Email : rahmat.robi.waliyansyah@upgris.ac.id

clc;clear;close all;

RGB = imread('pillsetc.png');
imshow(RGB);

I = rgb2gray(RGB);
threshold = graythresh(I);
bw = im2bw(I,threshold);
bw = bwareaopen(bw,30);

se = strel('disk',2);
bw = imclose(bw,se);
bw = imfill(bw,'holes');
[B,L] = bwboundaries(bw,'noholes');

hold on
for k = 1:length(B)

boundary = B{k};
plot(boundary(:,2), boundary(:,1), 'w', 'LineWidth', 2)
end

stats = regionprops(L,'Area','Centroid','Eccentricity');

for k = 1:length(B)
boundary = B{k};
delta_sq = diff(boundary).^2;
perimeter = sum(sqrt(sum(delta_sq,2)));

area = stats(k).Area;
eccentricity = stats(k).Eccentricity;
metric = 4*pi*area/perimeter^2;

centroid = stats(k).Centroid;
text(centroid(1),centroid(2)-16,num2str(k),'Color','r',...
'FontSize',20,'FontWeight','bold');
disp('===================================')
disp(strcat(['Object number = ', num2str(k)]))

disp(strcat(['Area = ',num2str(area)]))
disp(strcat(['Perimeter = ',num2str(perimeter)]))
disp(strcat(['Metric = ',num2str(metric)]))
disp(strcat(['Eccentricity = ',num2str(eccentricity)]))

if metric>0.8
text(centroid(1)-16,centroid(2)+16,'Bulat','Color','r',...
'FontSize',20,'FontWeight','bold');
else
text(centroid(1)-16,centroid(2)+16,'Tidak Bulat','Color','b',...
'FontSize',20,'FontWeight','bold');
end
end