how can i calculate area enclosed by contour?
8 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
dziri halima
le 11 Juil 2015
Commenté : Image Analyst
le 15 Juil 2015
I used snake to enclosed the left ventricle; how can i calculate area enclosed by contour?
0 commentaires
Réponse acceptée
Image Analyst
le 11 Juil 2015
If you used activecontour, it returns a binary image, so you simply label it and call regionprops:
labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage, 'Area');
allAreas = [measurements.Area];
7 commentaires
Image Analyst
le 15 Juil 2015
You're just calling some automatic threshold on the image and using that to calculate the area.
nb = im2bw(I, graythresh(I));
labeledImage = bwlabel(nb);
measurements = regionprops(labeledImage, 'Area');
allAreas = [measurements.Area]
You're not even using the results of your snakes algorithm at all! Even so, I'd be surprised if the auth-thresholded image for both images gave the very same areas. But regardless, I don't think that's what you want to do. You can use the snake boundaries and pass them into poly2mask() to create a binary image from the snake boundaries.
Plus de réponses (0)
Voir également
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!