POV-Ray : Newsgroups : povray.macintosh : [Q] POV-Ray in command line : Re: [Q] POV-Ray in command line Server Time
2 Oct 2023 08:29:56 EDT (-0400)
  Re: [Q] POV-Ray in command line  
From: Francois LE COAT
Date: 16 Mar 2021 12:17:07
Message: <6050da03$1@news.povray.org>

> Bald Eagle writes:
>> Francois LE COAT wrote:
>>> I've completed the WEB page I mentioned. This image processing is
>>> applied to a drone flying in Vosges a few days ago. I was thinking ab
>>> to apply the same computations with the flight of Ingenuity on Mars..
>>> <https://en.wikipedia.org/wiki/Mars_Helicopter_Ingenuity>
>> Nice.
>> I modeled a drone propeller like that ... 7 years ago?
>> <http://news.povray.org/povray.binaries.images/attachment/%3Cweb.53dd2
> Great =)
> The goal is modelling the trajectory and the visible relief with a
> simple video, using the images from Ingenuity's camera, like in :
> <https://hebergement.universite-paris-saclay.fr/lecoat/demoweb/temporal
> the video is <https://www.youtube.com/watch?v=MzWu7zwdJSk> Do you
> remember that we talked about translate <Tx,Ty,Tz>, rotate
> <Rx,Ry,Rz> and shear (or skew) angles <Sx,Sy,0> for the camera ?
> Then we can deduce the trajectory, and the monocular depth.
> You'll see what it gives on Mars, if you haven't seen it in a
> forest, with a drone, in winter ... This is spectacular :-)

I recently worked a little further on the trajectory of the drone...


Instead of using uniquely Ry (yaw) and Tz (translation), I also used
Tx (translation) and Rz (roll) to reconstruct the trajectory. I couldn't
use Ty (translation) and Rx (pitch) because it is not looking like a
valid camera displacement. I have no real explanation.

But the aspect of the drone's trajectory is looking better ...

Thanks for your help.

Best regards,



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