----- Forwarded message from Alannah Pearson <[email protected]>
-----
Date: Mon, 28 Jan 2013 01:54:35 -0500
From: Alannah Pearson <[email protected]>
Reply-To: Alannah Pearson <[email protected]>
Subject: RE: ? Programs
To: [email protected]
Hi Bill,
Thanks for the suggestions. I am using CT scans which I ultimately was wanting
to use and gather landmarks from. I am very new to this whole thing (literally
only a few months) and at this point I'm just checking out what my options are.
I've just started my PhD program. Ultimately, I want to use the scans in place
of the actual specimen, so I need it to be fairly good quality. I will try the
few trial options you have listed. I have Meshlab installed but I need an
intermediary program that will convert my image stack into a smooth mesh. I
understand there are a lot of options out there, at this point I'm trying to
get a "visual" idea of what I am planning on doing, so loosely going through a
practice process at the moment.
It's nice to get a good idea of what I need and what the best options are.
Thank you again,
Alannah
-----Original Message-----
From: [email protected]
[mailto:[email protected]]
Sent: Monday, 28 January 2013 5:26 PM
To: [email protected]
Subject: Re: ? Programs
----- Forwarded message from William Sellers <[email protected]> -----
Date: Sun, 27 Jan 2013 06:22:47 -0500
From: William Sellers <[email protected]>
Reply-To: William Sellers <[email protected]>
Subject: Re: ? Programs
To: [email protected]
There are lots of possibilities nowadays - some free, some paid. What you need
depends a bit on where your image sequence comes from. If it's from CT then
there is usually enough contrast for the automated systems to isosurface your
mesh automatically. I use Osirix for this but there are plenty of others and
they all work perfectly well. I used to think there wasn't much difference
between them but I'm not so sure any more - mesh quality looks like it might be
a little better in Avizo which surprises me a little since they all use the
same algorithms under the hood (marching cubes is more or less ubiquitous).
However it may incorporate some cleanup. If you need to clean up your images
first then that's a whole different ballgame and you need to look at the
various tools available. This is where the free versions do lose out to the
paid for software although I do quite like Seg3D.
Once you've got your mesh, what are your plans? The meshes that come out of
isosurfacing are often not very good. By that I mean that they either have an
enormous number of tiny triangles, or if you apply smoothing and decimation
within the isosurfacing software, they are often over smoothed and missing
features. Meshlab does quite a good job of fixing them up but it describes what
it does in rather technical language and it tends to crash with very big meshes
(although it is getting better). If you want to lovingly fix up your meshes
interactively then again the paid for tools do a much better job - Geomagic for
example is excellent.
The paid for options are all *very* expensive - several thousand pounds upwards
- and they can have expensive yearly costs too. So I'd invest some time in the
free options if you can.
Cheers
Bill
--
Dr. Bill Sellers Email:
[email protected]
Faculty of Life Sciences Tel. 0161 2751719
The University of Manchester Fax: 0161 2755082
D1239 Michael Smith Building Mob: 0785 7655786
Oxford Road, Manchester, M13 9PT, UK http://www.animalsimulation.org
On 27 Jan 2013, at 05:02, [email protected] wrote:
>
> ----- Forwarded message from Alannah Pearson
> <[email protected]> -----
>
> Date: Fri, 25 Jan 2013 23:06:07 -0500
> From: Alannah Pearson <[email protected]>
> Reply-To: Alannah Pearson <[email protected]>
> Subject: ? Programs
> To: [email protected]
>
> Hi, I was wondering what programs are available that can take an image
> sequence and convert into a mesh? Or will I require several programs? Does
> anyone know of particularly good ones? Any help is greatly appreciated.
>
>
>
>
>
> Thanks,
>
>
> Alannah
>
>
>
>
> ----- End forwarded message -----
>
>
>
----- End forwarded message -----
----- End forwarded message -----
