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Re: How To Publish Photos On Stereopix.net

Stereopix Net
 

The use of English is a bit odd, but can be forgiven as Jack is apparently not a native speaker.

I am totally not an English native speaker.
You can report if you see something that can be improved, such as the wording, so that I can try to include the corrections in a next update.

JackDesBwa


Re: Rokit Phone limitations

Depthcam
 

> I believe the PPTV King 7S has the finest glasses-free lenticular display of any such phone to date.


Comment?


Of course !  I agree that the King 7S is one of the best.  But I am also fond of Elephone's P8 3D that I end up reaching for more often than my King 7S.  The reason for that is actually a quirk in TDG that interferes with the full screen display of 16:9 images on the 7S.  The problem is that when TDG was created, the developers saw fit to add a permanent toolbar on the display whenever there were no hardware navigation buttons on the phone (or tablet) itself.  That is why when using TDG on a VKworld or P8 3D phone, there is no toolbar within the display, but with the King 7S, a permanent toolbar does come up and reduces the overall size of the picture.  So it's nothing to do with the quality of the King 7S's display - just with the frustration of a great app that hasn't been updated in years.


> Too bad it's stuck at Android 5.


The Elephone P8 3D is at Android 7 while the P11 is at Android 8.  Actually, the ROKiT 3D phones are the only ones that get routinely updated and they are currently at Android 9.


> But it's still my daily driver as a phone (using 3G in the USA).


Using a 3D phone as an actual phone ?  That's a novel idea ! ;-)

Francois


Re: Rokit Phone limitations

Depthcam
 

> I use the JS Digitech autostereoscopic 3-D phone.  It displays extremely sharp images with superb depth


To the best of my knowledge, JS3D products have seldom ever been marketed even though they have shown many samples over the years.  JS3D uses exactly the same 3D technology used on the ROKiT and most other glasses-free 3D phones produced over the last five years, which is K3DX lenticular film. So I am unclear what would be different about it if you have had an opportunity to compare it with other 3D HD glasses-free phones (such as the Elephone P8 3D, P11 3D or the PPTV King 7S).

But the biggest problem with ANY JS3D products is that they are rarely found in stores and not even on Chinese online stores !  The only exception was their model SY-533 which was briefly marketed by an Australian company called "Alienline" (at an exhorbitant price) a few years ago.

One thing I did find however is that some of the phones on JS3D's website are actually Elephone products.  For example, some months ago, they still had a listing for what was essentially Elephone's P8 3D and just today, I checked their latest listings and find they are offering what essentially is Elephone's forthcoming "U 3D".  So it's possible they may be acting as a distribution agent for Elephone.

Francois


Re: Rokit Phone limitations

turbguy
 

I believe the PPTV King 7S has the finest glasses-free lenticular display of any such pone to date.  Too bad it's stuck at Android 5.  But it's still my daily driver as a phone (using 3G in the USA).

Comment?

Wayne


Re: Rokit Phone limitations

Depthcam
 

> The Rokit IO Pro has a lot of issues.


Hmmmm....   now that we know you work for Holopix (gallery for the RED Hydrogen One), one might question the impartiality of your comments ! ;-)

Having tested a variety of glasses-free HD 3D phones since 2013, the IO Pro 3D is one of the best displays I have yet seen.


> the 3D camera is awful


There is no 3D camera on the IO Pro.  That might explain it ! ;-)


> and their app store has no 3D games or apps as far as I can tell.


Perhaps if you were more familiar with the arena of glasses-free 3D you would be aware that several 3D apps exist that work on the IO Pro 3D as well as on a variety of other glasses-free 3D phones.

RED chose another route making all of those apps incompatible with their system. As a result, the Hydrogen has sunk while the ROKiT is still in flight !


> It's definitely a budget phone, that's for sure.


"Budget as in "accessible" - something the Hydrogen One never was...

Francois


Re: Britans's Greatest Engineer in stereo

Jim Johnston
 

How can I get this software?
Jim


John Rupkalvis
09/17/19  

This could be done with the Stereoid software by Pretend:  http://www.pretendllc.com/MIME/Stereoid%20User%20Guide%20v1.01.pdf
 
John A. Rupkalvis
stereoscope3d@...


Re: Britans's Greatest Engineer in stereo

Jim Johnston
 

How can I get this software?

Jim


Re: The big problem with 3D photo closups.

Depthcam
 

> There are many 3D photos that get significantly better when bokeh is applied


Perhaps this might be a good time to point out that blur and bokeh are not synonymous ! One is just an out of focus area of a picture while the other is the effect caused by out of focus light sources in the background that take on a shape - most often a circle but sometimes other shapes.  There are even lenses with special apertures that produce various bokeh shapes. However, simple out of focus backgrounds or foregrounds are just that: blurry !


> This is one of several reasons why no part of a stereoscopic image, including near and far, should ever be out of focus, since you never know what part of the image the person who is seeing it will be looking at during any time.


One thing I especially enjoy in a 3D photograph is the ability to explore the scene from the closest to the farthest part of it.  This of course requires the entire image to be in focus. For that reason, I always strive for my pictures to be in sharp focus from the nearest point to the farthest.

But I also have to recognize that I have seen some interesting 3D images with out of focus backgrounds although the overwhelming majority of these were macro shots where emphasis was entirely placed on the main subject - for example, a bee, butterfly or other insect.


> Hundreds, and in some cases thousands of people "like" images on the platform which have bokeh artistically applied


Unfortunately, "likes" are not a measure of quality.  If it were so, then McDonald's would be serving gourmet food ! ;-)

But all kidding aside, although I do agree that some pictures where an uninteresting background is out of focus may work, I personally prefer to avoid shallow DOF.

Francois


Re: Restoring old Cirvil 3D War Photos

turbguy
 

I discovered the LOC scans years ago.  I have downloaded many and made them crossview.  The LOC did a great job with the scans (IMO).

https://www.flickr.com/photos/turbguy/albums/72157642185423175

Of particular interest are the scan of plates fro Carte de Viste photos, made with "multiplying cameras", having 4 or more lenses.  It was a chore to find matching plates, but I think it was worth it.
I have downloaded a small fraction of them, and made them crossview, here:

https://www.flickr.com/photos/turbguy/albums/72157632880240869

I call them hidden, because I don't beleive most have EVER been made "stereographic".

Also, with careful use of SPM's clone tool, it is possible to repair most damage/defects on one view with image information from the other view, such as done here:

Before:

https://www.flickr.com/photos/turbguy/8512365958/in/album-72157632880240869/lightbox/

After:

https://www.flickr.com/photos/turbguy/8512370018/in/album-72157632880240869/lightbox/

Wayne


Re: Restoring old Cirvil 3D War Photos

John Clement
 

Unfortunately parts of some images have been saturated, so the detail is effectively gone.  Attempts to bring it back in that case will yield badly smeared extremely noisy details.

 

John M. Clement

 

From: main@Photo-3d.groups.io <main@Photo-3d.groups.io> On Behalf Of John Rupkalvis
Sent: Saturday, February 1, 2020 7:17 PM
To: main@photo-3d.groups.io
Subject: Re: [Photo-3d] Restoring old Cirvil 3D War Photos

 

For restoring stereo pairs of any kind, including stereo cards, the Stereoid software by Pretend, LLC is really useful.  

 

 

Older stereo pairs, like Civil War stereo cards from the 19th century, often have faded differentially, yielding a different apparent exposure and/or contrast (dynamic range) between the left and right eye views.   Stereoid will match them exactly, as well as facilitate many other corrections.   When you are working with color images, or colorizing black & white images, it will match the left and right colors exactly.  

 

John A. Rupkalvis

stereoscope3d@...

 

Picture

 

 

On Sat, Feb 1, 2020 at 4:23 PM David Starkman via Groups.Io <reel3d=aol.com@groups.io> wrote:

David Richardson did a book on "Restoring and Tinting Vintage Images" and also does incredible restorations of Civil War Stereo views. He also colorizes the, but makes them available restored B&W as well as restored color. See http://historyinfullcolor.com/home/


Re: The big problem with 3D photo closups.

Depthcam
 

> It can be a big problem, details matter...


I guess you misunderstood what I was saying..  In my first sentence I mainly state that the world being three-dimensional, our eyes perceive parallax.


> With our unaided vision, when viewing a very close subject, our eye accommodation is on the near, making the far unfocused.


You bring up some good points in regards human vision.  But In my comments, I was specifically addressing the aspect of photographing the real world - rather than viewing it.


> There is no relationship to our eye FOV and taking FOV.  Narrow FOV taking lenses and matching narrow FOV viewing lenses, is still ortho.


You are not addressing the specific issue here.  This is not about ortho stereoscopy but simply about the problems that occur when one tries to photograph a very close subject - say twelve inches away - using a stereo camera that has a normal interaxial and long focal length lenses. What I stated refers to the fact that the wide field of view of our eyes allows us to view the whole subject even when it is very close to our eyes (viewing discomfort notwithstanding) while a camera with a normal interaxial and lenses that have a narrow FOV may cut off parts of the subject due to the narrow FOV of the taking lenses.  Using a camera with lenses having a very wide FOV - such as a VR180 camera - solves that problem.


> But its not relevant to the OP position.


Well, given the OP essentially copied the post I made in another thread yesterday, I guess it is my position as well ! ;-)

Francois


stereopix.net - interlaced image output for passive 3DTV

Boris Starosta
 

I use a fairly common full HD passive 3DTV monitor (i.e. 1080p, a 24" LG screen).  When I switch the stereopix web viewer to interlaced, I cannot get the 3D effect to span the entire height of the screen.  Some part of the image will be stereo, other parts pseudo.  This is regardless of if I've switched to full screen display or not.  It is also regardless of what image I am viewing.  I would assume the web player would scale the output image to match the monitor resolution - but it is not working.  Can someone help me with this problem?
--
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Contemporary work in the Stereoscopic Arts:  www.patreon.com/retroformat
––––


stereopix.net - albums vs. categories

Boris Starosta
 

I've started using stereopix.net and have a few questions.

On the help page, the site mentions "categories" that can theoretically be added by the users.  I see no way to add categories?  Or are categories simply albums?
In their "photolab" users can create albums, to include their own images and optionally images from others.  Are the albums what the word categories otherwise refers to?

When creating an album, one is theoretically given the choice for limiting image input to <just oneself, from others with a review process, and from others automatically>.  One is additionally also theoretically given the choice of limiting viewing access to the album by either <invitation only via a link, or everybody>.  However, on the page where you create your new album I see only one pull-down set of choices "Approbation: private / request / automatic"   
It is not clear what these three choices refer to (viewing or adding images?), and in any case it is not clear that both viewing and submission of images to the gallery can be controlled independently.

Please help!

thanks

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


Re: The big problem with 3D photo closups.

Nima
 

So-called "bokeh" has been called aesthetic or artistic.  It is not.  It is just an excuse for poor photography that is an eyestrain to try to look at, and is killing 3D.

I will have to disagree with JR here.  There are many 3D photos that get significantly better when bokeh is applied.  It is a tool that can take an unusable, out-of-focus 3D photo to a beautiful, compelling one.  In many cases, it resolves eye-strain problems, not causes it.  It all just depends on where and how it's done.  With the right tools, even novices can use it to correct their images.

And I actually have data to back this up!  Take a look at the app Holopix on RED Hydrogen One, which is the app I manage.  Hundreds, and in some cases thousands of people "like" images on the platform which have bokeh artistically applied.  They are often at the top of our Trending Feed.  This shows that "regular" people, i.e. not strictly 3D fanatics, sometimes greatly prefer the artistic use of bokeh.


Re: The big problem with 3D photo closups.

turbguy
 

I cannot disagree about realism being important.  But I realize that sometimes it may NOT be important.  That's a matter of "taste", no?

How can you not make things "bigger" without getting "closer"?

Wayne


Re: How To Publish Photos On Stereopix.net

Boris Starosta
 

Roger, when "editing" your uploaded photo, select the checkbox for "published photo."   Then click the button "edit photo."  
The use of English is a bit odd, but can be forgiven as Jack is apparently not a native speaker.  


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


Re: Rokit Phone limitations

Nima
 

I use the JS Digitech autostereoscopic 3-D phone.  It displays extremely sharp images with superb depth

I can confirm this.  JR was nice enough to show me and my friends at a 3D Trailer Park event held by Eric Kurland of 3-D Space.

Very clear image!  Probably some of the sharpest 3D I've seen.  But, like all lenticular displays, the viewing angle was tiny.  It's a good trade-off for single users though.


Re: The big problem with 3D photo closups.

turbguy
 

As a close-up example, try this crossview (hand-held cha-cha, about 1 cm shift). 

I do not object to out-of-focus areas at all.  But YMMV.

https://www.flickr.com/photos/turbguy/2585955903/in/photostream/lightbox/

Wayne


Re: Measure Your Pupillary Distance #theory #viewing #howto

Nima
 

Will the display be 4k pixels...or 4k pixels after you turn your head to see all of the imagery? 

Ha!  No, almost every VR headset I can think of has always been able to decode and play back 4K 3D 360 video, as far back as the original Samsung GearVR in 2014.  

According to Panasonic, it's dual 4K-equivalent panels.  Meaning the panels won't be 3840x2160 rectangular panels, but closer to 1:1 ratio panels that have about the same total pixel count.


Re: The big problem with 3D photo closups.

John Rupkalvis
 

The whole idea of stereoscopic 3-D is to make things appear more realistic.  The whole idea of stereoscopic 3-D close-ups is to make things appear closer.  Making them look bigger is a distortion that occurs in 2-D.   

John A. Rupkalvis
stereoscope3d@...

Picture


On Sat, Feb 1, 2020 at 9:00 PM turbguy <wkarberg@...> wrote:
I thought the whole idea about "close-ups" WAS to "make things appear bigger"...

Wayne