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[Octave-bug-tracker] [bug #38465] IMAGE: regionprops Centriod order
From: |
Juan Pablo Carbajal |
Subject: |
[Octave-bug-tracker] [bug #38465] IMAGE: regionprops Centriod order |
Date: |
Mon, 04 Mar 2013 20:20:20 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22 |
Follow-up Comment #2, bug #38465 (project octave):
Mathowkrs gives a rather obscure explanation
http://www.mathworks.ch/ch/help/images/ref/regionprops.html#bqkf8ln
To understand the problem run the following code in Octave
m = false(10); m(4:5,4:5) = true;
node = regionprops (bwlabel(m,4),"Centroid").Centroid
imshow(m); hold on; plot(nodes(1),nodes(2),'.m'); hold off
You see that the Centroid is in the wrong place. I was informed that the same
lines in Matlab would give the Centroid in the right place (please verify, if
you can), therefore we need to make regionpros to return the Centroid with xy
coordinates swapped, i.e
imshow(m); hold on; plot(nodes(2),nodes(1),'.m'); hold off
Does the right thing
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