Effacer les filtres
Effacer les filtres

How can I plot the diameters of an irregularly shaped region in an image?

3 vues (au cours des 30 derniers jours)
This is my code:
props = regionprops(BW, 'Area', 'Perimeter','Centroid','EquivDiameter');
allAreas = [props.Area];
allPerimeters = [props.Perimeter];
centroids = cat(1, props.Centroid);
allDiameters = [props.EquivDiameter];
figure(1);
imshow(BW);
title('Outlines, from bwboundaries()', 'FontSize', 1);
axis image; % Make sure image is not artificially stretched because of screen's aspect ratio.
hold on;
boundaries = bwboundaries(BW);
numberOfBoundaries = size(boundaries, 1);
for k = 1 : numberOfBoundaries
thisBoundary = boundaries{k};
plot(thisBoundary(:,2), thisBoundary(:,1), 'r', 'LineWidth', 2);
end
hold on;
plot(centroids(:,1),centroids(:,2), 'b*')
hold off
This gives me the following image:
I got the actual values of the diameters through "EquivDiameter", but how can I plot the diameters of each individual blob on top of their centroids?

Réponse acceptée

Image Analyst
Image Analyst le 28 Juin 2018
Try this:
xCentroids = centroids(1:2:end);
yCentroids = centroids(2:2:end);
for k = 1 : length(xCentroids )
txt = sprintf(' %.2f', allDiameters(k));
text(xCentroids(k), yCentroids(k), txt, 'FontSize', 20, 'FontWeight', 'bold');
end
  3 commentaires
Image Analyst
Image Analyst le 29 Juin 2018
OK. You might make the font size a bit smaller. Honestly I don't know why you want the diameters on the image if there are so many of them.
But anyway, if I've answered all your questions, can you click the "Accept this answer" link?
Asher Zaidi
Asher Zaidi le 29 Juin 2018
Sure, thanks!

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Plus de réponses (1)

Matt J
Matt J le 28 Juin 2018
Modifié(e) : Matt J le 28 Juin 2018
You can use the text() command to write the diameters onto the image at desired locations.

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Version

R2018a

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