-------- Original Message --------
Subject: Re: sliding semi-landmarks question
Date: Wed, 14 Mar 2012 10:28:01 -0400
From: thimacek <[email protected]>
To: [email protected]
Hi Jordan,
I've done something for my BSc. research that went basically like what
you mentioned. I don't exactly remember the specifics, but if I'm not
mistaken it involved first assigning landmarks using tpsDig (by hand, as
usual), then drawing the outlines, also with tpsDig, and asking the
programme to "redraw" them with given numbers of points for each area
between landmarks - basically the same as what you've described. I also
remember having first run some analysis (which I think was based on
MacLeod's paper) to decide on a sufficient number of points to represent
the curves which would still leave me with a semi-decent sample
allowing for statistical analyses.
In fact, I'd also be quite interested in further suggestions if someone
has other ideas.
Regards,
Thiago Zahn
------------------------------------------------------------------------
Em 14/03/2012 00:32, *morphmet < [email protected] >*
escreveu:
-------- Original Message --------
Subject: sliding semi-landmarks question
Date: Tue, 13 Mar 2012 22:35:28 -0400
From: Jordan Mallon
To: [email protected]
Dear all,
In his paper on the extended eigenshape method, MacLeod (1999)
describes a procedure whereby outlines are traced so that homologous
points across specimens are identified as landmarks, and equal numbers
of semi-landmarks are allocated between them. How would I do this in
practice using sliding semi-landmarks? Would I have to first identify
the landmarks as such in tpsDig, and then draw separate lines between
them using consistent numbers of points that I would later identify as
sliding semi-landmarks in tpsUtil? Or is there a better, more
streamlined way of doing this? Unfortunately, I can't seem to find any
answers in the mailing list archives.
Thanks,
Jordan
