POV-Ray : Newsgroups : povray.macintosh : [Q] POV-Ray in command line : Re: [Q] POV-Ray in command line Server Time
18 Jul 2024 07:17:06 EDT (-0400)
  Re: [Q] POV-Ray in command line  
From: Francois LE COAT
Date: 26 Jun 2021 09:51:19
Message: <60d730d7$1@news.povray.org>
Hi,

>>> 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 

>>>>> about
>>>>> 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.53d
d26749e0d00ba5e7df57c0%40news.povray.org%3E/propeller2_dragonfly.png?ttop
=432863&toff=950> 
>>>>
>>>
>>> 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/tempor
al_disparity.html> 
>>>
>>>
>>> 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 ...
> 
> I worked on the sixth flight of the "Ingenuity" helicopter on Mars...
> 

> 
> Unfortunately, there was an incident with the dated flight information
> and the video sources from the NASA aren't so good for processing :-(
> I wish we will have a color video, from the second embedded camera :-)

If you read the comment from the NASA about the 8th flight of Ingenuity:

<https://mars.nasa.gov/technology/helicopter/status/308>

you understand that there was no color camera acquisition for the 7th
and the 8th flight on Mars. This was due to the incident on the 6th
flight, and a conflict between acquisition of the two embedded cameras.
Let's hope for subsequent flights of the helicopter, that NASA has fixed
the horodating problem. Let's hope we will have a color video from Mars.

Thanks for your help.

Best regards,

-- 

<http://eureka.atari.org/>


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