find sphere in the range of radius in 3D matrix

4 views (last 30 days)
Is there any function like imfindcircles(image,[radius1 radius2]) in 3D? I want detect all object like sphere in range of two radius.

Answers (1)

Image Analyst
Image Analyst on 12 Sep 2014
What I'd do is to binarize your image then label it and call regionprops(). Get things like the volume (area), bounding box, surface area (perimeter), etc. and see which of those is close to the values you'd expect for a perfect sphere..
  2 Comments
Erfaneh
Erfaneh on 12 Sep 2014
I did this job that you said before. I keep all objects that they have the range of volume. but in my binary matrix remain some objects that they are in the range with different shape. I want to keep just the object that it like a sphere.
Image Analyst
Image Analyst on 13 Sep 2014
Then calculate the surface area and the volume and compute the sphericity. See Wikipedia for the formula: http://en.wikipedia.org/wiki/Sphericity

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!