----- Forwarded message from morphmet_modera...@morphometrics.org -----
Date: Tue, 24 Jun 2014 23:13:58 -0700
From: morphmet_modera...@morphometrics.org
Reply-To: morphmet_modera...@morphometrics.org
Subject: Re: landmark configuration reflection
To: morphmet@morphometrics.org
----- Forwarded message from Carmelo Fruciano <c.fruci...@unict.it> -----
Date: Thu, 19 Jun 2014 17:39:49 -0400
From: Carmelo Fruciano <c.fruci...@unict.it>
Reply-To: Carmelo Fruciano <c.fruci...@unict.it>
Subject: Re: landmark configuration reflection
To: morphmet@morphometrics.org
> ----- Forwarded message from Miguel Eduardo Delgado Burbano -----
>
> Date: Fri, 13 Jun 2014 23:46:37 -0400
> From: Miguel Eduardo Delgado Burbano
> Reply-To: Miguel Eduardo Delgado Burbano
> Subject: Re: landmark configuration reflection
> To: morphmet@morphometrics.org
>
> Hi Carmelo
>
> Thank you for your response. Yes I know that Matlab is a very useful
> software, perhaps you can share with me your code or procedures in
> Matlab??
Dear Miguel,
sure, it simply applies some formula for reflection of points relative
to an axis (of course you need to have two points defining your axis).
And, again, this would be appropriate only to visualize the results
NOT to produce a dataset to analyze with commonly used landmark-based
methods.
> Purposely do you know if it is possible to obtain the z coordinate
> if I only have the x and y coordinates??. I mean it is possible
> perform a reconstruction of the z coordinate of a landmark using
> the information on the x and y coordinates ??
Not sure what do you mean by "z" coordinate, do you mean the third
dimension? If your digitized configurations of landmarks all lay on a
plane and/or they are digitized from the same projection (i.e. a
single picture, for example), obviously you cannot obtain any "z"
coordinate from them...
Best,
Carmelo
> On Fri, Jun 13, 2014 at 4:50 PM, wrote:
>
> ----- Forwarded message from Carmelo Fruciano -----
>
> Date: Tue, 10 Jun 2014 04:01:02 -0400
> From: Carmelo Fruciano
> Reply-To: Carmelo Fruciano
> Subject: Re: landmark configuration reflection
> To: morphmet@morphometrics.org
>
> morphmet_modera...@morphometrics.org ha scritto:
>
>>
>> ----- Forwarded message from Miguel Eduardo Delgado Burbano -----
>>
>> Date: Thu, 5 Jun 2014 17:59:15 -0300
>> From: Miguel Eduardo Delgado Burbano
>
>> Reply-To: Miguel Eduardo Delgado Burbano
>
>> Subject: landmark configuration reflection
>> To: morphmet_modera...@morphometrics.org
>>
>> Hi all
>>
>> I am performing a 2D geometric morphometric study using human
>> skulls. In a previous research I digitized several landmarks and
>> semilandmarks in the right half of the face, but now I am trying to
>> perform an analysis using the complete face (i.e both halfs), so in
>> order to not digitized again perhaps I can reflect the right
>> landmark configuration on the left side. Since the reflection is
>> performed during the procrustes (GPA) perhaps a particular software
>> allows to reflect the landmark configuration TPS, MorphoJ, GeoMorph
>> etc??
>>
>> any suggestions?
>
> Hi Miguel,
> Normally these days when I have to do these reflections I use Matlab.
> For an older paper (Fruciano et al. 2011 - It J Zool) I think I used
> LMedit from the IMP package (it's been a while now).
> However, if your data is only on half of the face, I would perform the
> analysis only on half the face and then use reflection across a
> symmetry axis only to display the results...
> Best,
> Carmelo
>
> --
> Carmelo Fruciano
> Marie Curie Fellow - University of Konstanz - Konstanz, Germany
> Honorary Fellow - University of Catania - Catania, Italy
> e-mail c.fruci...@unict.it
> http://www.fruciano.it/research/
>
> ----- End forwarded message -----
>
> ----- End forwarded message -----
>
> ----- End forwarded message -----
>
>
--
Carmelo Fruciano
Marie Curie Fellow - University of Konstanz - Konstanz, Germany
Honorary Fellow - University of Catania - Catania, Italy
e-mail c.fruci...@unict.it
http://www.fruciano.it/research/
----- End forwarded message -----
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