MATLAB Answers

To Arrange Count Numbers

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Murat Kocaman
Murat Kocaman on 1 Aug 2018
Edited: Murat Kocaman on 1 Aug 2018
Hello,
At the count result on image processing, the result is given in random object numbers. Is there a way to set which count number is which object? I have a reference object and I am trying to have calibration referenced to that object but because it changes in each count I couldn't do that.

  3 Comments

KSSV
KSSV on 1 Aug 2018
What count? What image? What object?
Murat Kocaman
Murat Kocaman on 1 Aug 2018
At these objects, number 31 is the reference object. But to fix it as a referenced one I need to fix its number. I am not sure if it is possible or not but I need to know if it is possible to add it as the number 1. Because other measurements would be referenced on its values.
Guillaume
Guillaume on 1 Aug 2018
I think what Murat is refering to by count number is the label value assigned by bwlabel or bwconncomp to the binarised image (which is not random at all by the way).

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Answers (1)

Guillaume
Guillaume on 1 Aug 2018
The label value assigned to a blob by bwlabel or similar function is not random. Objects are labeled in order from left to right according to their leftmost pixel. For objects whose leftmost pixel fall on the same column, then the order is top to bottom.
It would be trivial to relabel your objects using a different rule as long as you can give a clear definition of that rule (perhaps you want to base the label on the location of the centroid?).

  1 Comment

Murat Kocaman
Murat Kocaman on 1 Aug 2018
So I will use the most small one as a reference object. Is it possible to assign the smallest one as reference object?
I know doing this seperately as a single program but I need to do this for poly objects so it should be checked automatically as the smallest one and assigned with the label no:1. This way, it would be provided as the smallest one always and it would be able to labelled as reference object.

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