how can i calculate area enclosed by contour?
8 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
dziri halima
il 11 Lug 2015
Commentato: Image Analyst
il 15 Lug 2015
I used snake to enclosed the left ventricle; how can i calculate area enclosed by contour?
0 Commenti
Risposta accettata
Image Analyst
il 11 Lug 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 Commenti
Image Analyst
il 15 Lug 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.
Più risposte (0)
Vedere anche
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!