[MORPHMET] Dennis Slice’s obituary

[Sonja Windhager]

Dear all,

Below please find the link to Dennis Slice’s obituary:
https://www.dignitymemorial.com/obituaries/tallahassee-fl/dennis-slice-8744377 

 

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[MORPHMET] Dennis Slice

[Sonja Windhager]

We of the University of Vienna morphometrics group
are deeply saddened by the sudden death of Dennis Slice.
A guest professor here for more than fifteen years,
he was a mentor to many of our students; he was a colleague, 
a teller of uproarious tales, and altogether a very good friend.
In short, he was unique. We will miss him in all these ways.

Fred Bookstein, Cinzia Fornai, Philipp Gunz, 
Philipp Mitteroecker, Simon Neubauer, Katrin Schaefer, 
Horst Seidler, Gerhard Weber, Sonja Windhager

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Re: [MORPHMET] Doubt about scalling photos

[Sonja Windhager]

Dear Anderson Feijo, 

I assume that the difference is not a matter of scaling (that could be 
addressed with the Procrustes superimposition), but one of optical distortions 
caused by the lens. 
This paper exemplifies this for different lenses: 
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0149313 
<http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0149313>
Likewise, to minimize optical distortions with a small focal length you would 
need to enlarge the distance more than sharpness allows. 
If you have the possibility to use a 3D Scanner or photogrammetry, you could 
then set the viewing setting to “infinity” instead of mimicking a rather short 
lens for digitization. 

Best wishes, 
Sonja Windhager
—
Dr. Sonja Windhager
Department of Anthropology, University of Vienna (Lecturer) and
Department of Theoretical Biology, University of Vienna (Postdoc)
Althanstrasse 14, 1090 Wien, Austria
http://homepage.univie.ac.at/sonja.windhager/ 
<http://homepage.univie.ac.at/sonja.windhager/>
http://theoretical.univie.ac.at/people/windhager/ 
<http://theoretical.univie.ac.at/people/windhager/>





> On 29 Dec 2017, at 10:18, Anderson Feijo  wrote:
> 
> Hi everyone,
> 
> I am starting a new project using GM which I will work with groups with 
> different sizes (e.g., rodents and small carnivores). I would like to find a 
> way to use the whole dataset in the analyses, instead of perform set of 
> analyses for each sized group. So, I did a test using one skull and place the 
> camera in two different distances to the object (~15 cm and ~30 cm). My 
> expectation was after scaling (using tpsDig) I wouldn´t have any meaningful 
> difference. But I got two clear groups that were statistically different. So, 
> my question is how can I combine 2D landmarks based on photos taken from 
> different distances of the camera to the object. I have attached here the tps 
> file (10 copies of the same skull, five at ~15cm and five at ~30cm). I would 
> be very grateful for any suggestion.
> 
> All the best and Happy 2018!
> 
> Anderson
> 
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Re: [MORPHMET] digitising 2D landmarks on Mac

[Sonja Windhager]

Dear Damien,

for me tpsDig runs fine on Mac when using Wine (and Winebotteler).
Both are freeware. 

Best wishes,
Sonja

—
Dr. Sonja Windhager
Department of Anthropology, University of Vienna (Lecturer) and
Department of Theoretical Biology, University of Vienna (Postdoc)
Althanstrasse 14, 1090 Wien, Austria
http://homepage.univie.ac.at/sonja.windhager/ 
<http://homepage.univie.ac.at/sonja.windhager/>
http://theoretical.univie.ac.at/people/windhager/ 
<http://theoretical.univie.ac.at/people/windhager/>





> On 16 Mar 2017, at 23:57, Damien Esquerre  wrote:
> 
> Hi Morphmet community,
> I would like advice on the best option for digitising landmarks and 
> semi-landmarks on photographs on a Mac. I use TpsDig on windows which I like 
> a lot but would like to avoid installing a virtual machine since now I don't 
> have access to Windows.
> What the opinions on PhyloNimbus, Stereomorph or any other option?
> 
> Thanks in advance!
> 
> Damien Esquerré
> 
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Re: [MORPHMET] tps dig2 image file manipulations

[Sonja Windhager]

Dear Gabi, 

In tpsUtil, there is a function to delete/reorder specimens. 
Based on position or image name you can select or deselect the specimens you 
want to include/exclude from the new data file. 
So, there is no need to digitize them again. 

I would also recommend to always work with copies of the original data files, 
so that you never run into the risk of loosing your work no matter what button 
you hit. 

Best wishes, 
Sonja

—
Dr. Sonja Windhager
Department of Anthropology, University of Vienna 
Althanstrasse 14, 1090 Wien, Austria




> On 18 Jan 2015, at 06:39, gnavas  wrote:
> 
> Dear Morphometrics Wizards,
> 
> I am hoping someone has an answer to my question regarding tpsdig2:
> 
> I have digitized specimen from multiple sites (22 specimen per site) in 1 
> singular tps file in tpsdig2, and am wondering if I can somehow separate my 
> already digitized specimen so I have separate tps files representing each 
> site separately from the already made whole file? I have been overwriting my 
> current file until I finished digitizing all images, since I need to run a 
> site comparison. Additionally, I am interested in within site variation as 
> well. I am afraid of loosing my work if I hit append. So, at this point, do I 
> need to digitize each site again separately? Should that have been my first 
> step, and then combine all sites via the append option?
> 
> I hope I made my issue clear. Thank you in advance for your input!
> Gabi
> 
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