-------- Original Message --------
Subject: RE: Evaluating body length using tps landmark coordinates
Date: Wed, 11 Feb 2009 08:48:10 -0800 (PST)
From: Dominique Adriaens <[email protected]>
To: <[email protected]>
References: <[email protected]>
Henrik,
You could also use Past to calculate the interlandmark distance between
those two landmarks, and use that to standardize all other interlandmark
distances.
Best
Dominique
Prof. Dr. Dominique Adriaens
Ghent University
Evolutionary Morphology of Vertebrates & Zoology Museum
K.L. Ledeganckstraat 35, B-9000 Gent
BELGIUM
tel: +32 9 264.52.19, fax: +32 9 264.53.44
E-mail: [email protected]
URL: http://www.fun-morph.ugent.be/
http://www.zoologymuseum.ugent.be/
-----Original Message-----
From: morphmet [mailto:[email protected]]
Sent: woensdag 11 februari 2009 15:17
To: morphmet
Subject: Evaluating body length using tps landmark coordinates
-------- Original Message --------
Subject: Evaluating body length using tps landmark coordinates
Date: Tue, 10 Feb 2009 05:43:02 -0800 (PST)
From: Henrik Kusche <[email protected]>
To: morphmet <[email protected]>
Dear all,
using tpsdig2 I created an extensive tps-dataset that encodes body shape
in a fish species complex in terms of pixel units. Instead of using the
ruler tool in tpsdig2 I placed two additional landmarks, (lets say LM a
and LM b respectively) beyond the fish body whose distance on the
original photo is equal to 10 centimeters (a ruler was photographed
below the fish).
Among others I have two landmarks LM x and LM y ( LM x at the tip of the
snout and LM y at the base of the tail fin respectively) that define the
body length of the fish.
My problem is that I would like to use the 2 "10cm-scaling landmarks"
thus LM a and LM b as a length reference that permit me to assess the
distance between LM x and LM y, thus the body length of the fish.
I would be very happy if someone of you could help me with this problem.
Best wishes, Henrik
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