Photoluminescence Spectra of Emeralds from Colombia, Afghanistan, and Zambia by Brian Thompson. See Research Below
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 Post subject: Photogrammetry on a budget
PostPosted: Wed Oct 23, 2013 5:16 pm 
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I do not know if Photogrammetry is used in gemology
but I would like to try it and I can't afford the big
software.

Anybody have ideas for me ?


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 Post subject: Re: Photogrammetry on a budget
PostPosted: Wed Oct 23, 2013 5:45 pm 
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How could photogrammetry be applied to gemology?
I can see the spacial application could be somewhat relevant in geology and geography, but not in mineralogical or gemological application.

Please enlighten me if I've misinterpreted the application.


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 Post subject: Re: Photogrammetry on a budget
PostPosted: Wed Oct 23, 2013 10:10 pm 
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Barbra Voltaire wrote:
How could photogrammetry be applied to gemology?
I can see the spacial application could be somewhat relevant in geology and geography, but not in mineralogical or gemological application.

Please enlighten me if I've misinterpreted the application.


I would use it for many things like making micro measurements on
crystals, or study the geometry of cut stones. I'm sure I could find
many other fun ways to use such software :)


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 Post subject: Re: Photogrammetry on a budget
PostPosted: Wed Oct 23, 2013 10:31 pm 
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Couldn't one physically take all the measurements and determine angles on a xl or cut gem, using a Presidium gauge, a table gauge with magnification and a goniometer?

Gemologists usually work with the stone in hand, not a photo. :D


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 Post subject: Re: Photogrammetry on a budget
PostPosted: Wed Oct 23, 2013 11:38 pm 
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Barbra Voltaire wrote:
Gemologists usually work with the stone in hand, not a photo. :D


True, still if one would want to calculate angles or take other
measurements of microscopic inclusions this would be way to
do it. Some of these software can also analyze image patterns
and recognize/count particles. With stereo images you can also
do it in 3D

I know that Diamond Cutting software exist that are used to
maximize the yield of each stone. Using multiple images it will
build a 3D model and compute. This is a form of photogrammetry


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