Hi Charlotte,
make sure to take the picture of the spider and the scale at the same
time - then you can almost automatically scale all the spider pictures
to the same size in one of the tps programmes or in Image J (another
free software for working with pictures). It's important that the spider
and the scale have both the same distance to the lens of the camera (so
that both are in focus when you're taking the picture). Otherwise our
results might be inaccurate.
Hope that helps you!
All the best, Andrea
--
Andrea Stadlmayr
Department of Anthropology
University of Vienna, Austria
Althanstrasse 14, 1090 Vienna, Austria
e-mail [EMAIL PROTECTED]
phone +43-1-4277-54745
fax +43-1-4277-9547
morphmet schrieb:
> hi !
>
> I just started a study on wolfspiders (genus Hogna), I want to measure
> some morphological features (carapax,legs) but I'm also interested in
> the shape from for example the carapax and the position of the eyes. I
> think to use Tps.
> Untill now I didn't find any related research on this topic (measuring
> spiders).
>
> When I want to scale the pictures, do I have to take a picture of the
> desired object and then from a measuring rod ? (but then I have 2
> pictures, and I will have to photoshop the rod to the first
> picture..., isn't there an easier way ?)
>
> Thx for explaining to a fresh starter !
>
> sincerely greetings
>
> Charlotte
>
>
--
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