Count centroids in an image

Hey I have this binary image, with the centroids detetced but I need a way to count them so I get an output as number of characters is 7. I haven't been able to find a function or any way to do this.

[Adam Danz]

How are you plotting the blue * ?

[Adam Kelly]

Using this;

s = regionprops(fill,'centroid');
centroids = cat(1,s.Centroid);
imshow(fill)
hold on
plot(centroids(:,1),centroids(:,2),'b*')
hold off

After I filled the image, thought it would be easier to count if I could label the centroids and then count the centroids but having trouble with that part.

[darova]

Only using 2 centoids? (1 and 2)?

plot(centroids(:,1),centroids(:,2),'b*')

[Matt J]

but I need a way to count them

Why not just

numel(s)

[Adam Danz]

@Adam Kelly, it looks like you've got several suggestions here. Let us know if you get stuck or if you're looking for something different.

Answer 1

[Arash Rabbani]

Why not simply label the binary image? and 'Num' would be the number of characters.

[Label, Num]=bwlabel(Image)