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Re: 3D array from surfaces? [message #60382 is a reply to message #60381]

Wed, 14 May 2008 06:43

Mike[2]
Messages: 99
Registered: December 2005

Member

On May 13, 10:53 pm, Karl <Karl.W.Schu...@gmail.com> wrote:

> It isn't super clear to me either, and the only way I can make sense
> of it is if all the surfaces were closed, like spheres. Otherwise,
> you could have points that you could not decide are inside or outside.

I'll try to clarify: I've got surface models from a nice piece of
commercial software that is very good at segmenting medical data. It
creates a bitmask identifying points in the data that are inside the
organ of interest and then saves the enclosing mesh as an stl file. I
want to use the commercial software for the segmentation, but for my
analysis purposes, I want the bit map, rather than the surface.

What I'm doing to calculate a bit map is

1 - load vertices from STL file
2 - for each plane in containing volume
- find vertices on or near this plane
- use region_grow and/or polyfillv to find inside points

This works well since there are many, many vertices in these models.
I'll take a look at David's IDLanROI suggestion as well.

Mike

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[Message index]

		Re: 3D array from surfaces? By: David Fanning on Wed, 14 May 2008 07:06
		Re: 3D array from surfaces? By: Mike[2] on Wed, 14 May 2008 07:01
		Re: 3D array from surfaces? By: Mike[2] on Wed, 14 May 2008 06:43
		Re: 3D array from surfaces? By: Karl[1] on Tue, 13 May 2008 19:53
		Re: 3D array from surfaces? By: Rick Towler on Tue, 13 May 2008 16:52
		Re: 3D array from surfaces? By: David Fanning on Tue, 13 May 2008 14:54
		Re: 3D array from surfaces? By: Mike[2] on Tue, 13 May 2008 14:47
		Re: 3D array from surfaces? By: David Fanning on Tue, 13 May 2008 10:00

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