Date   

Re: Cheap Webcams for 3D

Bill Costa as just a member
 

... OBS can use these as input ...

Didn't know what "OBS" was so did a search, I assume you're talking about this...


...BC

--
Bill.Costa@...
No good deed goes unpunished.


Re: Cheap Webcams for 3D

gl
 


Hi Jay,

how are you generating an anglyph from OBS?  I had to modify the code to do it as (at least with the older version I've got) it doesn't support ADD blending.
--
gl

On 24/09/2021 06:32, Jay Kusnetz wrote:
I just recieved a pair of cheap webcams that are $8 each. I bought these to experiment with. These are HD rez, manual focus, much more annoying to focus than the Minru, but it can focus very close. As is, it can have a minimum of 50mm separation, or 40mm when vertically mounted. Possible that removing it from the case will allow it to be closer together. OBS can use these as input, and output either an anaglyph or 1/2 sbs. There seems to be a little lag, so for video would have to use OBS audio delay to maintain sync. 


Cheap Webcams for 3D

Jay Kusnetz
 

I just recieved a pair of cheap webcams that are $8 each. I bought these to experiment with. These are HD rez, manual focus, much more annoying to focus than the Minru, but it can focus very close. As is, it can have a minimum of 50mm separation, or 40mm when vertically mounted. Possible that removing it from the case will allow it to be closer together. OBS can use these as input, and output either an anaglyph or 1/2 sbs. There seems to be a little lag, so for video would have to use OBS audio delay to maintain sync. 


Re: Twin Camera Nuclear Test

Boris Starosta
 

If you could synchronize the footage of these two films, you would not get a 3d view - at least not one with a stereobase wide enough to give a useful stereoscopic effect (because both cameras were on the one plane).  Instead, take the right hand film (it's the better one) and duplicate it, placing it side-by-side with itself in one video.  Then within that formatting, retard the left side of the video by (a consistent) ten or twenty frames, and THEN you'd have a nice 3d video, though slightly out of synch.  The plane moving to the left means that the left-eye image needs to be taken from later in the film by half a second or so.

I don't have the time to work on that right now, though I might get around to it if nobody else does first (Heggie?).  

In the video as shown now, the left film seems to be running at a higher frame rate.  The two films are in decent synch at the beginning but rapidly diverge after that, out of synch by 5 seconds within the first 30 seconds, and ten seconds after about a minute.  The result is no 3d effect in the beginning, with an increasing 3d effect (indeed cross-eyed) forming rapidly thereafter, but soon no longer viewable due to the disparities becoming too large.  Besides that, right now there is a huge and very variable vertical misalignment to suffer through!

––––
Contemporary work in the Stereoscopic Arts:  www.patreon.com/retroformat
––––


Cascade Stereoscopic Club Monthly Meeting Invitation: Attend either IN PERSON or via ZOOM: Monday, September 27, 7:00 PM Pacific Time

Herb Weiner
 

Everyone is invited to attend the very first Cascade Stereoscopic Club Hybrid Meeting (Attend either IN PERSON or via ZOOM) on Monday, September 27, 7:00 PM Pacific Time. The In-Person meeting will be held at Herb's home in SE Portland, and anyone who is fully vaccinated is invited to attend. Masks are optional. If you would like to attend in person, please RSVP to herbw@..., and I will provide my address. We will view photos and videos on my 3D TV, and I have a webcam and an additional monitor to provide an enjoyable viewing experience for those who attend in person as well as those who join the Zoom meeting. The Zoom invitation is at the end of this email.

The agenda is:
  • Everyone is invited to share their 3D photos. The theme of this month's meeting is Parades. Please email your photos, preferably in MPO format, to herbw@... no later than Noon Pacific Time Monday, September 27 (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 Noon Pacific Time Monday, September 27 (to allow time to prepare them for sharing at the meeting).
  • We will select six photos (no more than two from any member) to submit to ISU CODE Folio 28.
  • We will view the third part of ISU CODE Folio 27 slideshow.
  • As always, we will be pleased to answer any questions you have about 3D photography and the Cascade Stereoscopic Club.
For those attending the Zoom meeting, note that photos will be presented using Stereopix ROOMS (http://rooms.3dpdx.org). Stereopix ROOMS allows you to choose your preferred viewing method (e.g. Anaglyph, Parallel, Interlaced, etc.) for viewing photos. Here is a short (2 minute) YouTube video by Ken Kovar showing how to use Stereopix ROOMS to view photos: https://www.youtube.com/watch?v=Q2cPQ1vlJ_4 . For best results, you should join both the Zoom meeting and the Stereopix ROOMS website. If you wish, you can use two devices (e.g. a computer to join the Zoom meeting, and a tablet to join Stereopix ROOMS. If you have an Android phone, you can use this with a viewing device like Google Cardboard to view Stereopix ROOMS, but this does not appear to work correctly with an iPhone.

Herb Weiner is inviting you to a scheduled Zoom meeting.

Herb Weiner is inviting you to a scheduled Zoom meeting.

Topic: Cascade Stereoscopic Club September Zoom Meeting
Time: Sep 27, 2021 07:00 PM Pacific Time (US and Canada)

Join Zoom Meeting
https://us02web.zoom.us/j/85728337120

Meeting ID: 857 2833 7120
One tap mobile
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Meeting ID: 857 2833 7120
Find your local number: https://us02web.zoom.us/u/keAbjdp8S9


Re: StereoPi V2???

robert mcafee
 

Great news. Let us all know what you think about the unit after some experience with it




On Thursday, September 23, 2021, 3:01 AM, Pierre MEINDRE <pierre.meindre@...> wrote:

Hi Robert,

I've received yesterday morning a mail from Crowd Supply saying that my order has been shipped:
> StereoPi v2 Camera Kit (Qty. 1)
> This package was shipped by Crowd Supply's fulfillment partner, Mouser Electronics.

In the mail there is also a link to the FedEx tracking system.
It should be delivered today (too bad, not working from home today!).


Pierre.


----- Mail original -----
De: "robert mcafee via groups.io" <geargod2=yahoo.com@groups.io>
À: main@Photo-3d.groups.io
Envoyé: Mercredi 22 Septembre 2021 23:25:01
Objet: [Photo-3d] StereoPi V2???

Anyone receive their StereoPi V2 or information about shipment? Last note I saw the material was at US distributer (Mouser) if I understood correctly







Re: StereoPi V2???

Pierre MEINDRE
 

Hi Robert,

I've received yesterday morning a mail from Crowd Supply saying that my order has been shipped:
StereoPi v2 Camera Kit (Qty. 1)
This package was shipped by Crowd Supply's fulfillment partner, Mouser Electronics.
In the mail there is also a link to the FedEx tracking system.
It should be delivered today (too bad, not working from home today!).


Pierre.


----- Mail original -----
De: "robert mcafee via groups.io" <geargod2=yahoo.com@groups.io>
À: main@Photo-3d.groups.io
Envoyé: Mercredi 22 Septembre 2021 23:25:01
Objet: [Photo-3d] StereoPi V2???

Anyone receive their StereoPi V2 or information about shipment? Last note I saw the material was at US distributer (Mouser) if I understood correctly


Re: Unwrap 3DCON sbs

Berezin Stereo
 
Edited

Just a reminder there are plenty more souvenir boxes available. Please see https://www.3D-con.com  
all proceeds go to the National Stereoscopic Association. 


StereoPi V2???

robert mcafee
 

Anyone receive their StereoPi V2 or information about shipment?  Last note I saw the material was at US distributer (Mouser) if I understood correctly


Re: Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

Philip Heggie
 

From: toychinook
Sent: Thursday, 23 September 2021 5:59 AM
To: main@Photo-3d.groups.io
Subject: Re: [Photo-3d] Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

 

Thank you.

I am looking forward to Hondo !

 


Re: Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

toychinook
 

Thank you.

I am looking forward to Hondo !


Re: Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

Philip Heggie
 

I have to reupload Hondo in the meantime here is

Devil's Canyon 1953 3d via MiDAs3 AI Hybrid

 

https://drive.google.com/file/d/1TLXhC_94R-iDkXsCL958lNHzHUwGdECF/view?usp=sharing

 

 

Sent from Mail for Windows

 

From: toychinook
Sent: Thursday, 23 September 2021 5:15 AM
To: main@Photo-3d.groups.io
Subject: Re: [Photo-3d] Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

 

Am I too late ?

Copyright police ?

Is it still available ?

I got this:


Sorry, the file you have requested does not exist.

Make sure that you have the correct URL and the file exists.

 


Re: Hondo 1953 (Uncropped) 3D via MiDaS3 AI, AI Enlarged Hybrid HSBS My best version yet.

toychinook
 

Am I too late ?

Copyright police ?

Is it still available ?

I got this:

Sorry, the file you have requested does not exist.

Make sure that you have the correct URL and the file exists.


Unwrap 3DCON sbs

forum@trivision3d.com
 

JMH/trivision3d : From UP3D pro list France

I invite you to see Christian A. Zschammer's very funny performance, he unwraps his 3DCON souvenir glasses box


https://www.youtube.com/watch?v=ULIWgX3bzzY

For your information, his next film "AND IN THE WAR - THOUGHTS FROM SARAJEVO" will be screened at Courant3d on 14 October.


------------------------------------------------

Je vous invite à voir la prestation très drôle de Christian A. Zschammer, il nous déballe sa boîte de lunettes souvenir 3DCON

https://www.youtube.com/watch?v=ULIWgX3bzzY

Pour info son prochain film «ET DEDANS LA GUERRE - PENSEES A SARAJEVO » sera projeté à Courant3d le 14 octobre.


Re: Looking for tilted / rotated 3D picture (on purpose!)

John Rupkalvis
 

I was stereographer on a story that involved this.  The client requested that certain scenes be replicated with a camera POV.  The camera was a special stereoscopic video camera that had been fitted with focal plane shutters for part of the effect.  Part of the story was about a person who had been laying down, sleeping on a couch, then was awakened, and then sat up, after which he stood up and walked across the room.  There was a large mirror in the room, so, depending on the actor's position and the camera position, the audience could see both his POV as if it were that of the audience, and the actor's actual action as observed.   The scene opened with the sleeping impression, being totally black.  As he opened his eyes, linear focal plane shutters opened behind both camera lenses, so it appeared that he was opening his eyes.  At that point in time, the camera was at 90 degrees to normal, such that the bottom of the camera was in the direction of his feet as he was lying on the couch.  Next, the camera, still turned on, was rotated to a normal horizontal position while it was being raised to the height of a person sitting upright on the couch.  At this point, everything looked "normal" in the POV of a person seated upright.  After the appropriate dialog, as scripted, the actor stood up, and the camera was raised to a standing height, keeping it in a normal horizontal position, even after he was standing. Everything in the camera POV now was looking normal to the room.  All was edited to match timing between the actor's action and the stereo video camera's motion and direction.  This was made very smooth and realistic by the gimbal mount, which functioned somewhat similar to a SteadiCam.  The final footage was edited in different forms, both with and without the mirror, to suit different audiences, and how much the client wanted to reveal to a specific audience.   

The 3-D effect looked great.  The client was very pleased.  However, the client's company owned the footage, so I was not permitted to copy it or reproduce it in any form.   

John A. Rupkalvis
stereoscope3d@...

Picture


On Sat, Sep 18, 2021 at 7:13 AM George Themelis <gathemelis@...> wrote:

 

Hi Guys,

 

I am working on a presentation on “Unusual Perspective on 3D”.

 

I have all kinds of unusual perspective pictures, except for a tilted/rotated picture (extreme: shot with the camera rotated at 90 degrees).

 

Has anyone done this on purpose, with a good effect?  Personally I have never done this but I have seen pictures that Jon Golden, Ron Fross, and maybe others. Done creatively this could work.

 

I would like to see a good example, if anyone has done it and use this picture with permission for my presentation.

 

Thank you,

 

George Themelis


Ten 3D Talkin Bout My Generation 2010 deanaglyph plus MiDAS3 AI More depth improved

Philip Heggie
 

Ten 3D Talkin Bout My Generation 2010 deanaglyph plus MiDAS3 AI More depth improved

 

https://drive.google.com/file/d/1IQwXVHXZZ_zjFmIGLlctqkdZ_HbJnsBe/view?usp=sharing

 

 

Sent from Mail for Windows

 


Re: Problem getting Owl viewer images to fuse

chrisgalway
 

Thanks Antonio for this comment.   I can see this is a little more complicated than I imagined ... experienced stereopaths will be amused at my slow learning curve!

I think in my case, there were two problems.  

First, the separation of (say) near points was quite large, 70mm or more in my stereocards, and I had a problem fusing those images in the Owl.  This was "cured" by making smaller images, with smaller, say 63mm, separation for near points ... these fuse (almost) instantly for me in the Owl viewer.  So "problem solved".

Except, you now raise a second issue, that is the disparity between near and far objects.  I have gone through my difficult-to-fuse larger stereocards.  Steve Hughes sent me a (beautifully made, something to aim for) card, and the separations for near and far are around 72mm and 75mm.  I can fuse the images in the Owl, with some effort.  But the ones that I really struggle to fuse in the Owl, have separations of 71mm and 79mm for near and far objects, i.e. too large.   It turns out they were "cha-cha" images, and presumably I used a large baseline (basically the baseline was uncontrolled).

So there seem to be two factors contributing to my difficulty in fusing images in the Owl, one being the separation for (say) near points and the other being to remember that the disparity must not be too large, as you point out.  I understand that long essays can be written on the issue of disparity ...


Re: Looking for tilted / rotated 3D picture (on purpose!)

Boris Starosta
 

Although this is veering a bit off topic.... addressing the most recent comments,
having a scene apparently lit from above makes it appear more familiar, natural.
Here's a pseudo composition in natural, available light, turned upside down
to obtain "correct" or familiar shadows: PSEUDO METAL




Conversely, if you intend to show a scene upside down, light it first from below, so that
upside down it will look more natural: CCFOG (Closed Cell Foam Opacity Gradient)






Hmm, I should make a blog post of this...
--
––––
Contemporary work in the Stereoscopic Arts:  www.patreon.com/retroformat
––––


Re: Problem getting Owl viewer images to fuse

John Clement
 

It is possible to buy lenses with a prismatic effect, so it may be possible to upgrade an Owl viewer by replacing the lenses.  The big advantage of Owl is the portability compared to a Holmes viewer.  I may have seen a Holmes viewer with fold down picture holder and lenses.  It would not have a hood, or a snap on hood would have to be used (Velcro?).  The standard Holmes viewer has wire picture holders but they are too delicate for a fold down device or a removable holder.  The cost of such a contraption would probably be more expensive than the standard ones.  Someone who is a good woodworker could probably modify a standard viewer to make it portable.

 

My Holmes viewer was a kit with distorted plastic lenses, so they were replaced by glass lenses.  Unfortunately it does not have a fold down handle.

 

It is possible to train your eyes for greater flexibility.  There is a device with an anaglyph 3D images that has the red and cyan images on separate clear plastic pieces that can slide horizontally.  Using this with standard  anaglyph glasses you can go through various amounts of horizontal disparity.  Working with it carefully and gently can give you more flexibility.  At one time one could get a set of Holmes cards designed to create more flexibility.  People who tolerate progressive lenses probably have good flexibility, but 5% cannot use them.  They do tolerate bifocals.

 

John M. clement

 

From: main@Photo-3d.groups.io <main@Photo-3d.groups.io> On Behalf Of Bob Aldridge
Sent: Sunday, September 19, 2021 2:51 PM
To: main@Photo-3d.groups.io
Subject: Re: [Photo-3d] Problem getting Owl viewer images to fuse

 

I wonder what is the width of the actual images are on your "problem" stereoviews?

Brian May's original OWL viewer was designed to view the stereoviews in his book on the work of T.R. Williams A Village Lost and Found. These are quite early stereoviews from the beginning of the 1850s and the images are about 2 1/2 inches wide, with infinity spacing of around 2 3/4 inches.

At the suggestion of John Dennis - long term editor of Stereo World the Journal of the National Stereoscopic Association - Brian reluctantly enlarged the "window" in the stereoview support to allow later stereoviews, printed in magazines like Stereo World to be viewed. The problem with this - and the cause of Brian's reluctance - was that later stereoviews tend to have larger images (3 inches seems to be common, with greater infinity spacing) and the prismatic effect of the OWL lenses is not intended to accommodate this width of infinity spacing. Now, a lot of long term stereoscopists develop "rubber eyes" so they are able to fuse these wider image pairs. But not everyone, and I suspect that you fall into the latter category.

So you need a viewer, designed for the later stereoviews, with lenses offering greater prismatic effect...

Bob Aldridge

 

On 19/09/2021 08:57, chrisgalway wrote:

At the risk of opening the floodgates, I'd would greatly appreciate some advice about getting stereo card images to fuse when using the Owl viewer (the bigger focussing one).  Following the instructions provided certainly does not work for me.

I have several stereo viewers for VM, Realist and MF transparencies and have no problem in fusing images in any of them with my eyesight (1.5 -2.0 diopters long sighted).  For stereo cards, the Loreo Lite is brilliant, the images fuse immediately (with or without glasses on) ... a very useful viewer indeed.

But I just cannot get the left and right images to fuse with the Owl viewer!   I've tried and tried.  Occasionally, in a very (usually) bright light, some stereo cards will fuse.   But ALL my stereo cards fuse instantly with the Loreo Lite in any reasonable lighting.  

What am I doing "wrong"?   By the way, apart from losing accommodation (focus) through age, and being 1.5D-2D longsighted, my vision is excellent and pretty well the same in both eyes.  I have also tried unaided cross-eye and free-viewing, neither come anywhere close to working.   


Twin Camera Nuclear Test

Bob Karambelas
 

The parts where the frames align seem to work well in 3D cross view.

https://www.youtube.com/watch?v=AY9kg63aQuE

"HD Two cameras filmed the nuke sea testing from the same aircraft 1958"

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