how can i calculate area enclosed by contour?
8 次查看(过去 30 天)
显示 更早的评论
I used snake to enclosed the left ventricle; how can i calculate area enclosed by contour?
0 个评论
采纳的回答
Image Analyst
2015-7-11
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 个评论
Image Analyst
2015-7-15
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.
更多回答(0 个)
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!