Date   

Re: Stereoscopic panorama of Mars !

 

On Fri, Mar 19, 2021 at 02:32 PM, Roger Maddy wrote:
You can download the 8K MKV file and look at it with the Skybox VR Player with an Oculus Rift or Quest Link.
BTW, I used the free 4K Video Downloader to download the 8K MKV file.
You can also drive towards Las Vegas on the 15 freeway and shoot your own pictures, which is probably the way Rod Serling did it. You've probably got better chances of finding water that way, too.


Re: Stereoscopic panorama of Mars !

 

On Fri, Mar 19, 2021 at 11:42 AM, Stereopix Net wrote:
However, according to the comment of Roger Maddy, watching it with YouTube VR app gives poor resolution. He managed to display it with another way and says that it then "looks perfect".
You can download the 8K MKV file and look at it with the Skybox VR Player with an Oculus Rift or Quest Link.


Re: Stereoscopic panorama of Mars !

Antonio F.G.
 

On Fri, Mar 19, 2021 at 01:42 PM, Stereopix Net wrote:
I am happy to announce that I managed to assemble a stereoscopic panorama from some images taken by the MastCam-Z of the rover Perseverance on Mars. More info in the associated YouTube page. I published it in two formats.
 
The first format is a classical 16:9 video where the landscape pans as if a stereoscopic camera was turned continuously:
BEAUTIFUL!  GREAT!
Pity YouTube only allows anaglyph
I has a slanted floating window (the lower border is nearer the upper one) . It recalls me a feature of 3Denlive.  Is it done with 3Denlive?
Could you tell the process you followed?

I had a look to the raw images of Sol 11, to see how they compare with your video. I set my Google spreadsheet to show only Sol 11, MastCam camera, and Altitude higher than -15°, and everything sorted by Azimuth. It became clear that your video has two stages of Altitude ~0° and ~-11°
  https://docs.google.com/spreadsheets/d/1lC_atsnJS7gELPieMiOlpoggcMfdaj3vgX00sL68i4A/edit?usp=sharing
The spreadsheet also shows large differences in brightness of the images, even when they have apparently the same filters. Perhaps because the photos are taken at different times of day. However the video looks very well equalized.

But the resolution of the video looks somewhat lower than the equivalent raw photos.


The other format is a VR360-3D video.
On the computer, you can choose in which direction to look at with the mouse and change the focal length with the mouse wheel.
Inside a VR headset, the image should be immersive. However, according to the comment of Roger Maddy, watching it with YouTube VR app gives poor resolution. He managed to display it with another way and says that it then "looks perfect".
Is it possible to view the VR with some Android app?

Regards
    Antonio


Re: Stereoscopic panorama of Mars !

Bob Aldridge
 

Wow!

I used the second link (https://youtu.be/Vod4pjcLH7k) in Firefox VR on an Oculus Quest 2 and it's amazing! Apart from having limited height (as oposed to most of the VR offerings - but the vast majority of them are flat, and this is 3D, so much more realistic!

Bob Aldridge


On 19/03/2021 18:40, Stereopix Net wrote:
I am happy to announce that I managed to assemble a stereoscopic panorama from some images taken by the MastCam-Z of the rover Perseverance on Mars. More info in the associated YouTube page. I published it in two formats.

The first format is a classical 16:9 video where the landscape pans as if a stereoscopic camera was turned continuously:

The other format is a VR360-3D video.
On the computer, you can choose in which direction to look at with the mouse and change the focal length with the mouse wheel.
Inside a VR headset, the image should be immersive. However, according to the comment of Roger Maddy, watching it with YouTube VR app gives poor resolution. He managed to display it with another way and says that it then "looks perfect".

JackDesBwa
_._,_._,_


Re: Stereoscopic panorama of Mars !

timo@guildwood.net
 

Thank you for sharing that Jack. I think it is fantastic, and well implemented with a mask on the first version. I think I see an obviously Atlantean pyramid shaped rock, centred at about 28 seconds in.

Timo

On Mar 19, 2021, at 2:40 PM, Stereopix Net <contact@...> wrote:

I am happy to announce that I managed to assemble a stereoscopic panorama from some images taken by the MastCam-Z of the rover Perseverance on Mars. More info in the associated YouTube page. I published it in two formats.

The first format is a classical 16:9 video where the landscape pans as if a stereoscopic camera was turned continuously:

The other format is a VR360-3D video.
On the computer, you can choose in which direction to look at with the mouse and change the focal length with the mouse wheel.
Inside a VR headset, the image should be immersive. However, according to the comment of Roger Maddy, watching it with YouTube VR app gives poor resolution. He managed to display it with another way and says that it then "looks perfect".

JackDesBwa


Stereoscopic panorama of Mars !

JackDesBwa|3D
 

I am happy to announce that I managed to assemble a stereoscopic panorama from some images taken by the MastCam-Z of the rover Perseverance on Mars. More info in the associated YouTube page. I published it in two formats.

The first format is a classical 16:9 video where the landscape pans as if a stereoscopic camera was turned continuously:

The other format is a VR360-3D video.
On the computer, you can choose in which direction to look at with the mouse and change the focal length with the mouse wheel.
Inside a VR headset, the image should be immersive. However, according to the comment of Roger Maddy, watching it with YouTube VR app gives poor resolution. He managed to display it with another way and says that it then "looks perfect".

JackDesBwa


vr180 to rectilinear in SPM?

ron labbe
 

It looks like there's an option in Stereo Photo Maker Pro to turn VR180 jpgs to rectilinear?
I see: Edit/ 360-180 image/ open VR180 jpeg... but any jpg I try to open I get "Cannot open Image" error.
Anybody know how to use this function? What is it, actually?

thanks


Cascade Stereoscopic Club Monthly Zoom Meeting Invitation: Monday, March 22, 7:00 PM Pacific Time

Herb Weiner
 

Everyone is invited to the Cascade Stereoscopic Club Zoom Meeting on Monday, March 22, 7:00 PM Pacific Time.

The agenda is:
  • Everyone is invited to share their 3D photos. The theme of this month's meeting is Hobbies. Please email your photos, preferably in MPO format, to herbw@... no later than Sunday, March 21 (to allow time to prepare them for sharing at the meeting).
  • Open Projector / Show and Tell. If you wish, the more experienced photographers in the club will be happy to provide constructive feedback on any photos you wish to share. Please email your photos, preferably in MPO format, to herbw@... no later than Sunday, March 21(to allow time to prepare them for sharing at the meeting).
  • We will select six images (no more than two from any individual) for the third and final round of the 2020-2021 ISCC (International Stereo Club Competition).
  • We will show a slideshow of images from ISU CODE Folio 26.
  • As always, we will be pleased to answer any questions you have about 3D photography and the Cascade Stereoscopic Club.
Herb Weiner is inviting you to a scheduled Zoom meeting.

Topic: Cascade Stereoscopic Club March Meeting
Time: Mar 22, 2021 07:00 PM Pacific Time (US and Canada)

Join Zoom Meeting
https://us02web.zoom.us/j/87195604808

Meeting ID: 871 9560 4808
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LA3d Club Virtual Meeting Tonight. Everyone invited 7PM Pacific #3d-cameras

Berezin Stereo
 

Hi,
You don't have to be a member.  Competition, pinhole talk, show and tell and more.


More from Brian May.

turbguy
 


Re: DIY Printed Holographic Display (Lenticular Optics Explained)

Mike Brown
 

Philip,

Thanks for posting that video. An excellent proof of concept. I'm sure the technology, resins, and procedures for self printing lenses will improve in the years ahead.

Michael


https://keystonedepth.cs.washington.edu/ #3Dcomposition

Ian Walker
 

With my apologies if this has already been discussed but I thought it might be of interest to many here:

KeystoneDepth: History in 3D (washington.edu)


Re: Sorting the images of the latest Mars Rover #extraterrestrial

Antonio F.G.
 

I made an update of the spreadsheet that includes (I hope) every MastCam image up to now. A little annoyance is Google does not let to update it keeping the same url. This is the new url:

https://docs.google.com/spreadsheets/d/1WtMVIyTyAjSW11wvUii77BNp5dPK3pnl7wBTg-62RF8/edit?usp=sharing

Regards
    Antonio


Re: DIY Printed Holographic Display (Lenticular Optics Explained)

forum@trivision3d.com
 

Le 17/03/2021 à 18:57, Depthcam via groups.io a écrit :
> he can adjust it to the thickness of the glass so that it is possibly not a problem


I am not convinced, given that MOPIC makes such "over the glass" sheets for specific phones and they never succeed in matching the phones that have the lenticular sheet under the glass.  Also, manufactured sheets for phones are far thinner and become essentially invisible while the ones he makes are very visible.

Sure, it's a nice feat for a do-it-yourselfer, but it's not as if he had come up with something really new. Judging from the comments, most people (aside from those bringing up the 3DS - as usual) assume that it's a new idea and that it would be nicee if such an item were commercially available.  It shows again how unaware average consumers are about the existence of 3D products.

Francois
_._,_._,_

JMH/trivision3d : Bravo for doing it ... but it's true that for a smartphone that we look at closely you need an ultra thin network ... so very reducing 3D volume. He with his big network he has a much larger volume ... but a visible network ... he must back.

Concerning "3D products", for the general public stereoscopy means nothing... and 3D is lost for stereoscopists, because it has been stolen from us by the computer 3D image (broadcast in 2D, sometimes in 3Ds).
Personally, I now add what represents stereo 3D to the general public... it's the term Holo... so I use "3Dholo" (with explanation behind stereoscopy).
After all, even those who make 2D projection on glass pyramid windows dare to say "holographic projection"... there stereoscopy is much closer to holography than their 2D projection. So I take the term "3Dholo".
By the way, ethymologically (I don't mean the definition of holo)... it means full restitution of the object.

So, it is important that the public makes the difference... and holo everyone knows thanks to the little dove on our CB.

The truth comes out of the mouths of children, and during our polarized projection they say: "Great holographic projection", others say: "it's like 3D but holo"... others say when I say "stereoscopy": "it's the stero too what? For me it's time to evolve our 3Ds into 3Dholo for a better understanding of the new public and the virtual 3D stereo volume that it represents. Note that I am not trying to convince anyone, I am just applying my idea.


Translated with www.DeepL.com/Translator (free version)



Re: DIY Printed Holographic Display (Lenticular Optics Explained)

forum@trivision3d.com
 

Le 17/03/2021 à 07:53, Philip Heggie a écrit :

Interesting video of DIY Printed Holographic Display (Lenticular Optics Explained)

 

https://www.youtube.com/watch?v=ktgbtoCD58I

 

 

Sent from Mail for Windows 10

 

_._,_._,_

JMH/trivision3d (France)  I was wondering when a 3D printer was going to engrave a lenticular grating... well, it's not as good as an acid etched grating on glass (Alioscopy 3D TV free of glasses), but it's a good start.

Come on, now we have to go back to the ancestor of the lenticular (Maurice Bonnet) ... the spherical (3D or and multi-axis animation). The lenticular was then developed by Maurice Bonnet because it was less expensive... the spherical at the time did not find a sponsor. It was dedicated to cinema projection... but today it is used in OFFSET printing "ultra high resolution".... because so much information to place under each half ball.

I wonder why no holographist has ever optically copied a 15 Lpi thick grating (better 3D volume than a 40 Lpi, itself better than a 75 or 100 Lpi)... because a HOE Holographic Optical Element... would show the same 3D volume as a 15 Lpi... but it would be flexible and stickable on a magazine.

Well, you'll have to shoot diagonal and vertical as well as horizontal, but it's not more complicated than a 3D shoot than horizontal.

Translated with www.DeepL.com/Translator (free version)

 


Re: DIY Printed Holographic Display (Lenticular Optics Explained)

Depthcam
 

> he can adjust it to the thickness of the glass so that it is possibly not a problem


I am not convinced, given that MOPIC makes such "over the glass" sheets for specific phones and they never succeed in matching the phones that have the lenticular sheet under the glass.  Also, manufactured sheets for phones are far thinner and become essentially invisible while the ones he makes are very visible.

Sure, it's a nice feat for a do-it-yourselfer, but it's not as if he had come up with something really new. Judging from the comments, most people (aside from those bringing up the 3DS - as usual) assume that it's a new idea and that it would be nicee if such an item were commercially available.  It shows again how unaware average consumers are about the existence of 3D products.

Francois


Re: Sorting the images of the latest Mars Rover #extraterrestrial

Antonio F.G.
 

On Wed, Mar 17, 2021 at 07:38 AM, Stereopix Net wrote:
If you check network traffic generated by the site you linked, it calls https://mars.nasa.gov/rss/api/?feed=raw_images&feedtype=json&category=mars2020 like is done in mars-stereo. No key is needed (but there might be a rate limitation per IP internally).
This only shows the images of sol 26 (I guess this is the last "day" in Mars)

But thank you for the ideas, just trying a little more, I got it!
I could download the JSON of the images of a day by adding "&sol=00004" to the url (for sol 4). It was a quite large file, so it looks like it includes all the images of the day.
The full url for sol 4: https://mars.nasa.gov/rss/api/?feed=raw_images&feedtype=json&category=mars2020&sol=00004

By the way, I am now discovering the JSON format of which I knew nothing before Perseverance landing. It looks almost identical to a Python dictionary, so I wonder whether STMANI3 would better use JSON instead of the pretty-printed dictionaries it uses now.

Regards
    Antonio


Re: Phereo unofficial frontend

JackDesBwa|3D
 

Oh! Phereo moved to TLS1.3 and the main display problem should then be solved now.
However, the CORS headers are not set for all photos so that some images (apparently the old ones, but not sure) have still display errors. Phereo-unofficial might still be needed for viewing them.

JackDesBwa


Re: DIY Printed Holographic Display (Lenticular Optics Explained)

JackDesBwa|3D
 

Sure using lenticular lenses over screens is done for years, but building your own one to match exactly your screen is a nice performance.
Also, since he controls the thickness of its lenticular material, he can adjust it to the thickness of the glass so that it is possibly not a problem [in addition the refraction indices are probably quite close]

JackDesBwa


Re: Sorting the images of the latest Mars Rover #extraterrestrial

JackDesBwa|3D
 

How can the JSON metadata be read from the NASA site directly?

If you check network traffic generated by the site you linked, it calls https://mars.nasa.gov/rss/api/?feed=raw_images&feedtype=json&category=mars2020 like is done in mars-stereo. No key is needed (but there might be a rate limitation per IP internally).
Or reverse-engineer https://mars.nasa.gov/mars2020/multimedia/raw-images/ for more arguments.

JackDesBwa

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