RE: centroid size and different distances from the object

[morphmet]

-------- Original Message --------
Subject:        RE: centroid size and different distances from the object
Date:   Tue, 17 Nov 2009 09:44:47 GMT
From:   tina klenovsek <tina_klenov...@yahoo.com>
To:     morphmet@morphometrics.org



Dear Zeno, Jessica and Luis!

Thank you very much for your prompt replies and willingness to help!

I haven't tried anything yet, but things are getting clearer. I will
read everything again (and again) and try out all steps making sure I
understand everything and contact you again if something won't be clear
to me!

I have been using only the TPS package so far and wish to stick to it.
But I am quite familiar with Photoshop so I think this should not be a
problem.

Any further suggestions are VERY WELCOME!

Tina Klenovsek




--- On *Mon, 11/16/09, morphmet
/<morphmet_modera...@morphometrics.org>/* wrote:


    From: morphmet <morphmet_modera...@morphometrics.org>
    Subject: RE: centroid size and different distances from the object
    To: "morphmet" <morphmet@morphometrics.org>
    Date: Monday, November 16, 2009, 11:11 PM



    -------- Original Message --------
    Subject: RE: centroid size and different distances from the object
    Date: Mon, 16 Nov 2009 16:23:50 GMT
    From: Camp, Jessica A <jessica-c...@uiowa.edu
    <http://us.mc528.mail.yahoo.com/mc/compose?to=jessica-c...@uiowa.edu>>
    To: morphmet@morphometrics.org

<http://us.mc528.mail.yahoo.com/mc/compose?to=morph...@morphometrics.org>
    <morphmet@morphometrics.org

<http://us.mc528.mail.yahoo.com/mc/compose?to=morph...@morphometrics.org>>
    References: <4b016462.2010...@morphometrics.org

<http://us.mc528.mail.yahoo.com/mc/compose?to=4b016462.2010...@morphometrics.org>>

    Tina,
    If you put your pictures into a program like tpsDig, you can measure
    a set length on screen. If you use tpsDig, click on the button with
    the hammer (it's called image tools). In the measure tab of the
    window that pops up, you can type in the length of the skull you're
    currently looking at, then measure it out on screen. If you haven't
    used it before, you'll also need to download tpsUtil to compile your
    pictures into files compatible with the program. If you use
    something outside the tps package to calculate centroid size,
    convert your files from .tps to .txt . You can also go about it
    differently by using a program like Photoshop to increase or
    decrease the zoom on your pictures so that they're all the same.
    It's been a while since I've done that and I don't remember the
    details of how to actually do it.
    And of course, in the future, always stick in a scale. ;)
    Hope this helps,
    Jessica Camp
    ________________________________________
    From: morphmet [morphmet_modera...@morphometrics.org

<http://us.mc528.mail.yahoo.com/mc/compose?to=morphmet_modera...@morphometrics.org>]
    Sent: Monday, November 16, 2009 8:40 AM
    To: morphmet
    Subject: centroid size and different distances from the object

    -------- Original Message --------
    Subject:        centroid size and different distances from the object
    Date:   Mon, 16 Nov 2009 11:06:26 GMT
    From:   tina klenovsek <tina_klenov...@yahoo.com

<http://us.mc528.mail.yahoo.com/mc/compose?to=tina_klenov...@yahoo.com>>
    To:     morphmet@morphometrics.org

<http://us.mc528.mail.yahoo.com/mc/compose?to=morph...@morphometrics.org>




    Please help!

    I have a collection of photos of mammal skulls that I took for
    morphometric analysis. But now I got new specimens of the same
    species that I would like to include into the already mentioned
    analysis.

    The problem is, I can't photograph new specimens under the exact
    conditions I photographed the first. Especially the DISTANCE of the
    camera from the skull is the problem. I can't photo the old again
    because they have been borrowed from many different museums and have
    already been returned.

    What shall I do? I need to calculate CENTROID SIZE for all 
specimens. Is
    this possible? I also don't have any scale on the old photos, but I 
know
    the exact length and width of every skull, is this enough?

    Please help me. I don' want all my old photos to go to waste.

    Thank you in advance!

    Tina






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