-------- Original Message --------
Subject: Re: Volume calculations from 3D mesh
Date: Wed, 11 Jan 2012 16:31:44 -0500
From: Emma Sherratt <[email protected]>
To: [email protected]
Dear Rebecca,
A simple way to do this would be to calculate the convex hull from those
landmarks. You can do this in R (package: geometry, convhulln) or using
the original code from http://www.qhull.org/. But perhaps because you
say :"My data from standard geometric morphometrics seems to not account
for the full range of variance we see based on our 3D scans", you may
want to use more landmarks?
best wishes,
Emma
**** __
(\ .-. .-. /_")
\\_//^\\_//^\\_//
`"` `"` `"`****
Emma Sherratt, PhD.
Post-Doctoral Fellow in Organismic and Evolutionary Biology
and Museum of Comparative Zoology
Harvard University
26 Oxford St.
Cambridge, MA 02138
[email protected] <mailto:[email protected]>
http://sites.google.com/site/esherratt/
On 11 January 2012 14:19, morphmet <[email protected]
<mailto:[email protected]>> wrote:
-------- Original Message --------
Subject: Volume calculations from 3D mesh
Date: Wed, 11 Jan 2012 13:51:21 -0500
From: Green, Rebecca <[email protected]
<mailto:[email protected]>>
To: [email protected] <mailto:[email protected]>
<[email protected] <mailto:[email protected]>>
Hi All,
I am working on a study to compare the development of facial shape
in mouse models who develop a cleft lip and those who do not, ie
looking at growth over time in various parts of the face and
comparing the differences between the two groups. My data from
standard geometric morphometrics seems to not account for the full
range of variance we see based on our 3D scans. To that end I am
interested in trying to calculate the volume of one area of the face
between 5 landmarks that essentially form a tetrahedron. I have used
MeshLab to landmark the images.
Does any one have any ideas of an easy way to calculate this, or a
software piece that can do this.
Best,
Rebecca
Rebecca Green
Williams Lab - Graduate Student
Program in Reproductive Sciences
303-724-4568 <tel:303-724-4568>
[email protected] <mailto:[email protected]>
