POV-Ray : Newsgroups : povray.advanced-users : Facebook 3D posts : Re: Facebook 3D posts Server Time
2 Aug 2021 02:23:35 EDT (-0400)
  Re: Facebook 3D posts  
From: BayashiPascal
Date: 4 Jul 2021 08:40:00
Message: <web.60e1ab4893de9b14a3e088d5e0f8c582@news.povray.org>
> 1) You may remember my POV-Ray scene 'Paris la nuit' a couple of years
> ago, based on a photograph by Sabine Weiss in 1953. It was just done by
> trial and error of course, and a hell of a challenge with all kind of
> assumptions. Nothing to do with photogrammetry of course, but I
> appreciate your caveats about any "easy magic" ;-).

I can't recall it from the name, neither find it with Google. Would you have a
link ? I would certainly enjoy seeing it again, as usual with your scenes :-)

> 2) I have seen on a couple of occasions (on TV), archaeologists make a
> lot of photographs of an object, under all kind of angles, and later
> combine those into a 3d model (with software of course). I saw that done
>   in particular on the terracotta army in China. Closer to home, geology
> students recently used a drone to photograph the walls of a quarry in
> the same manner, and assembled them into a 3d model of the quarry.
> Fascinating stuff, and relatively cheap to implement, especially for
> students I understood.

Yes, it's heavily used in archaeology, generally only for the most important
pieces as it is very time consuming, and sometime challenging. You will probably
enjoy this speech of an archaeologist talking about their struggles to produce
models of obsidian artifacts:
https://www.youtube.com/watch?v=g0YaWDrl5qI
I haven't mention it in my previous post but, any reflective or transparent
texture is also an immediate 'no go'. It completely confuses all current
algorithms.

> 3) I have been interested in archaeology for most of my life and so came
> quite early across the use of photogrammetry there. If I remember well,
> it was used by Unesco during the construction of the Assouan Dam in
> Egypt to move the Abou Simbel temple to a higher position. I was a
> reader of 'Archeologia' at the time.

I had plan to become a paleobiologist until I entered university where I've been
reoriented toward computer science. This has probably been a wise advice but I
always wonder what would have become that other me. So, I've been really happy
when I had the chance to work for archaeologists a few years ago.


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