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How to find the volume of a region in a segmented image?

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ma_thal
ma_thal on 15 May 2021
Closed: Matt J on 15 May 2021
Hi, I segmented an MR image and have 3 regions, backgound with pixel value of 0, gray matter with pixel value of 1 and white matter of pixel value of 2. How can I get the volume of each of those regions?

Answers (1)

Matt J
Matt J on 15 May 2021
stats = regionprops3(segmentationMap,'Volume')
  3 Comments
Image Analyst
Image Analyst on 15 May 2021
Why not? Why prevent yourself from using a built-in function? Your post is not labeled as homework, which is usually the reason, so why not use it?
I was going to assume that you had 3 binary images, one for each segmentation that you want to do (background, gray matter, white matter) and that you could simply use nnz() on each binary image, but unfortunately you probably won't let yourself use nnz() either.
To find out what you can use, read this:
ma_thal
ma_thal on 15 May 2021
Yes! it is homework, I'm new here so I didn't know I had to put that, I'm sorry..
Thank you for you idea. And I will check that link!

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