Matlab script for the Connected Component Labelling blog.

script.m

% Code created by Xavier Weber

% Create an image -- like the one in the GIF.
im = zeros(5,5);

im(1:1,5:5) = 255;

im(2:2,2:2) = 255;
im(3:3,1:1) = 255;

im(3:3,4:5) = 255;
im(4:4,4:4) = 255;
im(5:5,4:4) = 255;
im(5:5,2:4) = 255;

% Count the blobs
[nBlobs, im] = countBlobs(im);

% Give each blob a unique color
im = label2rgb(im);

%Show it
imshow(im, 'InitialMagnification', 5000);