Hi,

Francois LE COAT wrote:
>> To explain what I'm doing I've done a WEB page that is not yet finishe
d:
>>
>> <https://hebergement.universite-paris-saclay.fr/lecoat/demoweb/tempora
l_disparity.html> 
>>
>>
>> POV-Ray is totally appropriate to show what I'm doing, because it can
>> represent the eight parameters I'm obtaining from the camera movement.

>>
>> I obtain the eight:
>>
>> - Tx horizontal translation
>> - Ty vertical translation
>> - Tz depth translation
>> - Rx pitch angle
>> - Ry yaw angle
>> - Rz roll angle
>> - Sx horizontal shear angle
>> - Sy vertical shear angle
>>
>> and POV-Ray can represent those all. This already have been discussed 
in
>> <news://povray.advanced-users> because I'm modelling the 3D motion.
>>
>> The issue here, is just to make POV-Ray quiet when I'm rendering...
> 
> Here is what was done with a sequence at Mont Saint-Michel...
> 

> 
> There are three parts to the video, corresponding to three measures
> of the optical-flow: IODP, Farneback and DualTVL1. This gives three
> measures of different monocular depth (Temporal Disparity), quality
> growing. What is shown is that one can as well see the relief of a
> scene, with two eyes in stereo, or with one eye in mono through
> movement.
> 
> Let's experiment... You can either see the relief by closing one eye
> moving, or with both eyes without moving. Movement (as with TV, and
> without glasses) allows you to perceive the relief! There is no need
> to be equipped with a virtual reality headset (VR).

Here is a similar demonstration with a sequence at Notre-Dame...

     <https://www.youtube.com/watch?v=F_J0l_B5A2s>

With these conditions, the drone is flying in a transverse direction.
The monocular depth (temporal disparity) is therefore measured
horizontally. The trajectory is reconstructed in a birdview, at a
constant altitude. There is a yaw rotation (Ry). The four shown
displacement components are <Tx,Ty,Tz,Ry>. All mosaics representing
perspective registration measure have an inter-correlation index
that is not below 60%.

Thanks for your help.

Regards,

-- 

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

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Hi,

Francois LE COAT writes:
> I've made a WEB page about 18th flight of Ingenuity over planet Mars:
> 
> It's possible to reconstruct visible relief, and trajectory from the
> Ingenuity drone, using a simple video sequence. The monocular disparity

> is obtained by matching images with a reference, measuring optical-
> flow. The trajectory is obtained using parameters of the perspective
> transformation describing successive images...
> 
> <https://hebergement.universite-paris-saclay.fr/lecoat/demoweb/trajecto
ry.html> 
> 
> 
> Since April 19, 2021, the Ingenuity helicopter sent to Mars hasn't
> stopped flying over the planet. It was expected taking off only
> 5 times, to demonstrate that it was possible. In fact, we are in
> February 2022, and a final realization of 19th flight over Mars, was
> attempted. The measurements we take correspond to 18th flight over
> planet Mars, dated 15 December 2021.
> 
> The localization of the piloting assistance camera which is obtained,
> is not perfect. The lens of this camera has a radial distortion, what
> is not taken into account by the perspective kinematics model.

We are in August 2023, and the Ingenuity helicopter still flies over
Mars. There's no GPS satellite system on the planet, and a very little
atmosphere compared to Earth, but it is localizing itself with a
grey-scale camera that points to the ground, and it works like that...

Here is a video <https://www.youtube.com/watch?v=TP_ojUa6XtU>

The image processing computations are obtained from interpolation
performed at <https://twitter.com/stim3on/status/1419414689998594051>

transmitted down the JPL/NASA Laboratory at Caltech University...

Best regards,

-- 

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

Post a reply to this message

Hi,

Francois LE COAT writes:
>> I've made a WEB page about 18th flight of Ingenuity over planet Mars:
>>
>> It's possible to reconstruct visible relief, and trajectory from the
>> Ingenuity drone, using a simple video sequence. The monocular disparit
y
>> is obtained by matching images with a reference, measuring optical-
>> flow. The trajectory is obtained using parameters of the perspective
>> transformation describing successive images...
>>
>> <https://hebergement.universite-paris-saclay.fr/lecoat/demoweb/traject
ory.html> 
>>
>>
>> Since April 19, 2021, the Ingenuity helicopter sent to Mars hasn't
>> stopped flying over the planet. It was expected taking off only
>> 5 times, to demonstrate that it was possible. In fact, we are in
>> February 2022, and a final realization of 19th flight over Mars, was
>> attempted. The measurements we take correspond to 18th flight over
>> planet Mars, dated 15 December 2021.
>>
>> The localization of the piloting assistance camera which is obtained,
>> is not perfect. The lens of this camera has a radial distortion, what
>> is not taken into account by the perspective kinematics model.
> 
> We are in August 2023, and the Ingenuity helicopter still flies over
> Mars. There's no GPS satellite system on the planet, and a very little
> atmosphere compared to Earth, but it is localizing itself with a
> grey-scale camera that points to the ground, and it works like that...
> 
> Here is a video <https://www.youtube.com/watch?v=TP_ojUa6XtU>
> 
> The image processing computations are obtained from interpolation
> performed at <https://twitter.com/stim3on/status/1419414689998594051>

> transmitted down the JPL/NASA Laboratory at Caltech University...

Ingenuity made its 55th flight on August 12, 2023, what demonstrates the
robustness of the control GNU/Linux system, including in particularly
hostile conditions, an unknown environment and minimal supervision,
because the helicopter is almost autonomous, very very far from
everything somewhere in space.

Best regards,

-- 

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

Post a reply to this message

Hi,

Francois LE COAT writes:
>>> I've made a WEB page about 18th flight of Ingenuity over planet Mars:

>>>
>>> It's possible to reconstruct visible relief, and trajectory from the
>>> Ingenuity drone, using a simple video sequence. The monocular dispari
ty
>>> is obtained by matching images with a reference, measuring optical-
>>> flow. The trajectory is obtained using parameters of the perspective
>>> transformation describing successive images...
>>>
>>> <https://hebergement.universite-paris-saclay.fr/lecoat/demoweb/trajec
tory.html> 
>>>
>>>
>>> Since April 19, 2021, the Ingenuity helicopter sent to Mars hasn't
>>> stopped flying over the planet. It was expected taking off only
>>> 5 times, to demonstrate that it was possible. In fact, we are in
>>> February 2022, and a final realization of 19th flight over Mars, was
>>> attempted. The measurements we take correspond to 18th flight over
>>> planet Mars, dated 15 December 2021.
>>>
>>> The localization of the piloting assistance camera which is obtained,

>>> is not perfect. The lens of this camera has a radial distortion, what

>>> is not taken into account by the perspective kinematics model.
>>
>> We are in August 2023, and the Ingenuity helicopter still flies over
>> Mars. There's no GPS satellite system on the planet, and a very little

>> atmosphere compared to Earth, but it is localizing itself with a
>> grey-scale camera that points to the ground, and it works like that...

>>
>> Here is a video <https://www.youtube.com/watch?v=TP_ojUa6XtU>
>>
>> The image processing computations are obtained from interpolation
>> performed at <https://twitter.com/stim3on/status/1419414689998594051>

>> transmitted down the JPL/NASA Laboratory at Caltech University...
> 
> Ingenuity made its 55th flight on August 12, 2023, what demonstrates th
e
> robustness of the control GNU/Linux system, including in particularly
> hostile conditions, an unknown environment and minimal supervision,
> because the helicopter is almost autonomous, very very far from
> everything somewhere in space.

*Ingenuity over planet Mars*

#Ingenuity #Perseverance #Mars2020 #Mars #NASA #Solarocks

<https://www.youtube.com/shorts/gV0iPwSCFBY>

Here is a look back at Ingenuity's 59th flight on Mars, as captured by
the Mastcam-Z on the Perseverance Rover.

In this view, I've heavily enhanced the dust blown away during takeoff.
You can also see dust devils moving in the background!

Best regards,

-- 

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

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