extracting subvolume in different shapes

Hello all. As we know, by using 'subvolume' function we can extract volume data in cuboid form which is controlled by the limits . I want to ask that, IS there any process with we can extract subvolumes with 'subvolumes' function in different shapes such as - cylinder,sphere,conical etc. ? Thank you :)

Answer 1

[Image Analyst]

Well yes and no. As you probably know, an image must be rectangular. However you can mask the volume by some oddball shape so that everything else is zero, and then you can extract the bounding box. So it will be rectangular but the shape will be surrounded/filled with zeros from the shape out to the boundaries of the image.

[yogesh jain]

thank you for your consideration sir but could you please describe in some easier and descriptive way ?

[Image Analyst]

The image must have flat sides, like a box. It can't have round sides, like an apple or a cylinder. Though you can have an apple in a box where the apple has some gray levels and the "air" between the apple and the box sides has gray level of zero. Does that analogy work for you???

[yogesh jain]

Yes sir, thanks a lot for explanation . Now I want to share my task with you which is - I am having a filled sphere and a cylinder , I insert the cylinder into the sphere so cylinder will surely acquire some volume of sphere and they will be having some common volume . how to show or extract that part ??

[Image Analyst]

If you can segment them separately, you can just and the segmented images

binaryIntersections = binarySphere & binaryCylinder;

[yogesh jain]

Sorry but couldn't get the concept ...

[Image Analyst]

Them you should get some background in the logical operations such as AND and OR. Try this link: https://www.google.com/?gws_rd=ssl#q=logical+and+matlab