Count centroids in an image

2019 11 9
1 个回答
更新时间：2019 11 10
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0 个投票

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. CountImage.jpg

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Adam Danz
Adam Danz 2019-11-9
How are you plotting the blue * ?
Adam Kelly
Adam Kelly 2019-11-9
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
darova 2019-11-9
Only using 2 centoids? (1 and 2)?
plot(centroids(:,1),centroids(:,2),'b*')
Matt J
Matt J 2019-11-10
but I need a way to count them
Why not just
numel(s)
Adam Danz
Adam Danz 2019-11-10
@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.

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回答（1 个）

Arash Rabbani
Arash Rabbani 2019-11-10

1 个投票

Why not simply label the binary image? and 'Num' would be the number of characters.
[Label, Num]=bwlabel(Image)

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Adam Kelly
Adam Kelly
2019-11-9

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Adam Danz
Adam Danz
2019-11-10

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