----- Forwarded message from al cardini -----
Date: Thu, 18 Oct 2012 17:11:45 -0400
From: al cardini
Reply-To: al cardini
Subject: Re: Reflecting points from one side to produce
bilaterallysymmetriclandmarks... how?
To: morphmet@morphometrics.org
If you give a look at this paper (below), you'll find how I did it for
3D landmarks:
Cardini A., Diniz Filho J. A. F., Polly P. D., Elton S., 2010 -
Biogeographic analysis using geometric morphometrics: clines in skull
size and shape in a widespread African arboreal monkey. A. M. T. Elewa
(Ed.), Morphometrics for Nonmorphometricians, Lecture Notes in Earth
Sciences 124, Springer-Verlag Publishers, Heidelberg, Germany. DOI
10.1007/978-3-540-95853-6_8.
https://docs.google.com/file/d/0B7MW9En7Pb3VYWQ5NWM3YzktOGU3Ny00YTE1LTg3YTYtZmFjOGNmZDVmZGIx/edit?pli=1&hl=en_GB
For 2D data, it might be even easier. I did it in the past by using a
baseline superimposition using midline points, restoring size and
mirror reflecting landmarks by simply changing the sign of one axis in
xls.
Morpheus might have commands to do this even more directly.
Good luck.
Cheers
Andrea
On 18 October 2012 19:40, <morphmet_modera...@morphometrics.org> wrote:
>
> ----- Forwarded message from "Bissett, Thaddeus Geoffrey" -----
>
> Date: Thu, 18 Oct 2012 10:04:25 -0400
> From: "Bissett, Thaddeus Geoffrey"
> Reply-To: "Bissett, Thaddeus Geoffrey"
> Subject: RE: Reflecting points from one side to produce bilaterallysymmetric
> landmarks... how?
> To: "morphmet@morphometrics.org"
>
> This may be a stupid question, but I’m working with materials (chipped stone
> artifacts) that are pretty fragile, and in some cases the left or right side
> of the tool has been broken.
>
>
>
> These were typically symmetrical, so I’m trying to figure out if it’s
> possible (and if so, how) to reflect points from one intact side (left) to
> produce a bilateral set of points for analysis. I’m using the tps programs
> for digitization, and MorphoJ for analysis. Is this possible in either
> software package?
>
>
>
> If there’s a guide out that that I’ve missed, I’d love a link to it to save
> someone the effort of otherwise trying to explain.
>
>
>
> Thanks!
>
>
>
> ----- End forwarded message -----
>
>
>
--
Dr. Andrea Cardini
Researcher in Animal Biology
Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e
Reggio Emilia, l.go S. Eufemia 19, 41121 Modena, Italy
Honorary Fellow
Functional Morphology and Evolution Unit, Hull York Medical School
University of Hull, Cottingham Road, Hull, HU6 7RX, UK
University of York, Heslington, York YO10 5DD, UK
Adjunct Associate Professor
Centre for Forensic Science , The University of Western Australia
35 Stirling Highway, Crawley WA 6009, Australia
E-mail address: alcard...@gmail.com, andrea.card...@unimore.it,
andrea.card...@hyms.ac.uk, andrea.card...@uwa.edu.au
Webpage: http://sites.google.com/site/hymsfme/drandreacardini
Datasets:
http://ads.ahds.ac.uk/catalogue/archive/cerco_lt_2007/overview.cfm#metadata
Editorial board for:
Zoomorphology:
http://www.springer.com/life+sciences/animal+sciences/journal/435
Journal of Zoological Systematics and Evolutionary Research:
http://www.wiley.com/bw/journal.asp?ref=0947-5745&site=1
Hystrix, the Italian Journal of Mammalogy:
http://www.italian-journal-of-mammalogy.it/
----- End forwarded message -----
