Submitted 11 hours ago by wolframhydroxide@sh.itjust.works to science_memes@mander.xyz
https://sh.itjust.works/pictrs/image/9ae4c41d-0a59-47e7-837e-35fcc0a9f11a.jpeg
My time has come!
The above stereographic image is for cross-eyed viewing (most stereograms are wall-eyed, so you may need to put your finger in front of your screen until this one comes into focus)
This is an image of Honolulu, Hawaii, published by NASA. Note Diamond Head (the volcanic crater) in the south.
Here are some other stereopairs published by JPL:
About 21 years ago (😩) I made a stereoscopic photo for some online contest. I was pretty proud of it.
Ooh, nice depth!
Thanks! It was a pain to set up the little screen trick but for what it’s worth, I won the contest!
I remember my HP IPAQ, it was my first mobile computing device. That thing was so much fun.
I was mildly obsessed. It felt like the future! I miss technology like that. I’m kinda excited for all this AR stuff people are talking about because I haven’t really been excited by the latest and greatest shiny black rectangle in a long time.
That is really cool and the PDA screen is such a cool effect!
These are easier for me than normal Magic Eye pictures, because I can just use the “floating hotdog” method of putting it right up to my face, letting my eyes get used to being focused there and then slowly moving away from it until it pops out of the page/screen.
Why do all of these look inverted to me? Like, what should be a mountain is a deep hole in the ground.
These are cross-view, your probably using the focus at infinity trick instead.
Yup. That was exactly it. I was thinking “I know how to do these” and not even paying attention to the instructions at the bottom.
Wow, I had the same problem as the one you replied to and I thought you were making a joke I didn’t get but I stand corrected. You were absolutely 100% right.
Turns out I was focusing at infinity, didn’t even realize it was a different thing than crossing my eyes until I tried to cross my eyes first before focusing on the pictures…
Very cool, thanks.
Yeah, I’m also seeing them reversed.
Not sure why but those NEVER work for me lol
Not this, not magic eye books, absolutely nothing works.
Tried for many hours back in the day
If you have astigmatism or greatly different lens prescriptions per eye, it may be very hard for it to work.
If you do have astigmatism, you can kind of ‘squeeze’ or scrunch your eyelids down to compensate as you cross your eyes, and it may work better without glasses and closer up
Some people it just never works with
I can only do parallel-view, not crosseyed, those look so surreal that way (inverted height/depth basically)
Is that why I’m seeing things that way? Don’t understand the difference really, but is really odd to see Mt St Helens as a sinkhole instead.
I tried so long I tried every method, never worked for me. Then eventually I found an image that made it work for me
(Sorry for the Reddit link). How I do it: put your phone screen right before your nose and unfocus your eyes. Then, don’t move your eyes, don’t move your focus, but slowly move the phone away from your face. At about 10-20cm distance, you should be able to see a squirrel with a nut in its hands.
After that it became very easy to do other pictures simply by knowing what to expect (an actual 3d image).
That being said the one above is really hard.
Do you happen to have a dominant eye? If you primarily use one eye over the other I dont believe these work. For me, I have a scar in the middle of one eye that prevents most straight ahead vision, so its only used to add peripheral information.
These are all backwards. The eyes are reversed so everything that’s supposed to be a hole looks like a bump and vice-versa.
For a lot of people cross eyed views are easier, they would probably give similar complaints for a wall eyed view. It depends a lot on how your eye muscles behave
You’re doing “wall eyed” viewing. These are for “cross-eyed” viewing. “Wall-eyed” means your eyes are focusing at a point behind the image. You need to cross your eyes for these. Try putting your finger in between your screen and your eyes, varying the distance until the dots merge. Then, remove your finger, focusing on the image itself. That should allow for cross-eyed viewing.
Focusing at a point behind the image is exactly what we’ve always done for every other magic eye poster because it only requires relaxing your eyes (staring off into the distance) for the image to pop into focus. Cross eyed viewing is damn near impossible on any screen at less than an arm’s length away without significant eye strain or external devices (like the stereoscopic viewers that photogrammetrists would use to view these kinds of images without inducing a migraine) and since the dot is on top holding a finger up as a guide ends up obstructing the entire view unless your arms are growing out of your forehead. The wall eyed view has none of these issues.
I appreciate the post and your effort. But, the images themselves are frustrating and have killed my initial reaction, which was to share them further. Because I’m nearly the only person I know that wouldn’t loose interest in the explanation for “correct viewing” half way through. If they were wall eyed stereoscopic images, I could just say “Magic Eye”, they’d remember Mallrats, see the schooner, and go “Ooh neat.”
Ahhhh this doesn’t work on phones? I also did Wall eyed, works quite easy but the cross eyed hurts lol.
The destruction of the coastline in Honolulu is so sad to see :(
Boo, these are cross-view, not parallel-view.
I can never get the parallel view to work. My eyes want to focus too quickly. :( cross view is so much easier to me. I wish they came in both all the time.
I can still view these, but it’s much much harder for me.
I don’t know why parallel isn’t the default.
Lots of people can really easily go cross-eyed and look at these with no practice whatsoever. Fewer people can do the parallel kind with no practice or with the amount of practice they’ve already done.
What is parallel ?
I grew up with the Magic Eye books and have never been able to do cross-view as a result.
If you want wall-eyed viewing, you can just download the image and mirror flip it in an image editor.
Incorrect. You don’t mirror flip it, you swap the images to convert between cross/parallel view.
Source: I wrote my own stereogram software, I know the difference.
I love these so much thanks! On YouTube there’s also a ton in video format, like this one by Brian May.
Amazing! Thanks!
It’s not very active, but still has good content.
For some reason I’m getting the depth inverted. Mt. Saint Helens looks like a hole in the ground.
You’re doing “wall eyed” viewing. These are for “cross-eyed” viewing. “Wall-eyed” means your eyes are focusing at a point behind the image. You need to cross your eyes for these. Try putting your finger in between your screen and your eyes, varying the distance until the dots merge. Then, remove your finger, focusing on the image itself. That should allow for cross-eyed viewing.
That’s so weird, I always thought I was crossing my eyes when doing this…
Thanks that was it. I can lock in and focus the wall style very fast, as it is the most common. This took me while but got it with the finger trick!
It’s a schooner!
You dumb bastard, it’s not a schooner it’s a sailboat.
A schooner IS a sail boat, STUPID HEAD
Isn’t magic eye something different? I thout it was !autostereograms@lemmy.world instead of cross view images.
You are correct, they are slightly different, but are based on the same effect of stereo imaging.
I don’t think the locations are all correct.
1st: Honolulu, Hawaii 2nd: Lake Palanskoye, Kamchatka Peninsula, Russian Federation 3rd: Wheeler Ridge, California 4th: Mount St. Helens, Washington State 5th: Mount Meru, Tanzania 6th: Salt Lake City, Utah 7th: Meseta de Somuncura, Patagonia, Argentina 8th: Wellington, New Zealand
I have never ever in my life managed to make these work, I have no idea what’s wrong with my eyes
Cool effect. For me, it only works on a screen where the white dots are roughly the distance of my eyes. So not on a phone.
TIL I am a walleyed viewer
I’ve seen simlar things before, and the effect is cool, but these images don’t really seem like the best demonstration of the effect. You really want something with large variation in depth. These top-down landscape shots have quite subtle changes in depth. I can kinda see the effect but it’s quite subtle, especially when it’s so out of focus.
Thanks for the additional examples!
Is the last one (lion statue & building) a reprojection? I didn’t see depth (or parallax) in the background, just between the lion and the building.
Oh, that is SO COOL! Do you have any more anatomical pictures in stereo?
Ah, thanks for the edit. I still think that these have greater value from a scientific perspective, but I do also have a collection of many stereo images that I could post here for you! They’re MUCH older, though:
Sorry for the poor quality here! It’s difficult to take nice scans of these since they’re curved with age. OH, also, these are wall-eyed, not cross-eyed.
I agree with the general sentiment, though I believe that the value of these images from the perspective of scientific appreciation outweighs traditional Magic Eye images. I remember, ten years later on, how my professor for the geology intro course let us see images taken over Germany by British intelligence, and you could literally see how they used the stereography to find missiles, because you’d be looking at a bunch of flat terrain and then bam, there’s a weird thing poking up out of the ground near that farmhouse. Then, she showed us some of these, and showed us how you could compare the topography in these to those on the topo maps. From a “wow” factor, not everything is going to be as flashy as a Royal Institution Christmas lecture, but this is what science looks like.
At my work, we maintain computers that use Nvidia glasses to view stereo images of protein structures.
Nvidia doesn’t support them anymore, and there was an email thread that was forwarded to us by the lab manager of some scientists discussing the issue. One of them suggested to the others that they could just cross their eyes and see the images that way instead of using the glasses. Funny stuff!
The third from the end to the beginning is quite spectacular showing the effect. I’d put that one first, honestly.
Oh, also, I really miss the old JMOL molecular models that you could view in stereo. Anyone know what software is required to make those?
Awesome! I cross-posted this to !crossview@lemmy.world :)
Subbed! Thanks!
Ha, there is NO depth to this kind of thing it is just an illusion, don’t be fooled about what these tricky sciencists say.
I usually can do stereograms pretty well but for some reason I had to tilt my phone about 10° counter-clockwise for the stereo images to align to get the 3D effect.
Have you ever had your vision checked?
wolframhydroxide@sh.itjust.works 39 minutes ago
Since some people are apparently very salty about these being cross-eyed, despite the fact that that’s just how NASA made them, here, special for y’all, a selection: Image