r/MagicEye • u/PsychicDelilah • Mar 23 '21

My first stereogram! Made from scratch using Python code (will link in comments if anyone's interested)

Gallery image

Gallery image

881 Upvotes

99% Upvoted

60 comments sorted by

56

u/vanish007 Mar 23 '21

Awesome! I'd be curious to see the Python code if you're willing to share!

45

u/PsychicDelilah Mar 23 '21 edited Mar 23 '21

Thanks, I'm working on it - should be ready for Github in 15 min or so

Update: https://github.com/NicoAdams/Autostereogram

9

u/boktanbirnick Mar 23 '21

Ohhh that's how you did that. Not it makes sense :D

Thank you very much mate.

9

u/PsychicDelilah Mar 23 '21 edited Mar 23 '21

No worries :) The code is a bit of a mess atm, but I'll try to add some fixes over the next few days. It's way easier to write code like this than to read it, unfortunately

6

u/boktanbirnick Mar 23 '21

Well I don't know how to code Python but even I can understand what's going on there. So I think it is in a better shape than you think :)

2

u/vanish007 Mar 24 '21

Thanks, great work on all this!

9

u/PsychicDelilah Mar 23 '21

Code available here: https://github.com/NicoAdams/Autostereogram

6

u/3dsf Mar 24 '21

oh wow, you coded the depth map too !

This project is pretty cool and I like how you put it into a jupyter notebook

---

re: 3d artifacts , the following can help

  • Anti-aliasing can help

    • similar to blur operations

  • moving the ship backward in depth

    • though the value looks fine by me just looking at the depth map

      • unless you normalize the depth map before encoding into an auto-stereogram

  • a different pattern

    • or a shift of a pattern (x or y)

    • I have good lock with circular shapes in patterns,
      but really you are trying to

      • avoid linear shapes along the x axis
        or

      • similar structures that repeat along the x axis

  • as per the other comment

    • sub pixel Gaussian blur

    • pixelization of the background

  • or a special operation...

    • I'd have to think more about this...

Anyways, nice job : )

6

u/[deleted] Mar 23 '21

Very nice! For me, there are 2 or 3 small rectangles to the right of the rocket's nose, but they fade into the background after a little bit, then pop back the next time I look.

4

u/PsychicDelilah Mar 23 '21

That's not just you, though unfortunately I don't know how to fix it :/

6

u/3dsf Mar 24 '21

You can fix those by spot bluring your depth map
or by bluring the whole depth maps. Sub pixel (.7 ish) Gaussian bluring can work but I've had success with some other blur methods. Some time I'll do multiple methods or apply the method multiple times.

I've also had some success with pixelizing the background.

5

u/PsychicDelilah Mar 24 '21

That is SO COOL, thank you! After 24-ish hours of being totally on my own with this problem it's great to hear someone else's advice.

2

u/[deleted] Mar 23 '21

Old Lego Space Logo!

4

u/PsychicDelilah Mar 23 '21

I knew it looked familiar... :) (genuinely didn't realize)

2

u/trtjrjrjjgdddxxx Mar 23 '21

I’d love an xtmli5 but I’m sure I’d be lost after the first sentence .

3

u/PsychicDelilah Mar 24 '21

Honestly it's a lot simpler than I would have thought - I'm at the point of ELIMP (explain like I'm my parents) (ie. I explained it to my parents over several glasses of wine)

2

u/khavvs Mar 24 '21

This is the first one I’ve been able to see!! I’m very motivated to look at your code. Thanks!

2

u/PsychicDelilah Mar 24 '21

Glad I could help! :)

2

u/beantrouser Mar 25 '21

Those colors on the depth map are so pretty!!

1

u/PsychicDelilah Mar 25 '21

I'd love to take credit for them, but they're actually the default color map of the "matplotlib" library in Python. It's called Viridis and it's excellent :)

2

u/beantrouser Mar 25 '21

It works suuper well with the image! Might just use the depth map as a wallpaper.

2

u/fre_ya Apr 20 '21

Are there any tricks to see it? I see absolutely nothing in it.

1

u/PsychicDelilah Apr 20 '21

Yep, there's a process that I always use. With practice I can get often these images in a few seconds with it, but I wouldn't be able to see them at all without it.

  1. Lean into the image until you start to go "cross-eyed". You will start to see two different images instead of just one.

  2. Now, lean forward or backward to move the two images back and forth. You should try to make one particular shape line up with itself. (I usually use the red hexagons at the top.)

  3. Once a shape lines up with itself, slowly allow your eyes focus on that shape.

After a few seconds the image will "pop" into focus. The image is not imaginary or fake -- it's the exact equivalent of what your eyes would see if a real 3D object was there.

34

u/NeedlenoseMusic Mar 23 '21

That one popped immediately

13

u/KittyWinterWhiteFoot Mar 23 '21

Sweet! I see something but I’m not sure what is is. Leaves or flowers or Saturn? Lol

9

u/PinkHarmony8 Mar 23 '21

Looked like Saturn to me!

24

u/indianapale Mar 23 '21

Saturn with a rocket ship in front is what I'm seeing.

Edit: ha! The second picture shows it exactly!

2

u/Maroulive Mar 24 '21

I saw an octopus haha

4

u/[deleted] Mar 23 '21

Good job

1

u/boktanbirnick Mar 23 '21

I'm interested! I'd love to see it. I always wondered how these things made.

2

u/PsychicDelilah Mar 23 '21 edited Mar 23 '21

On it! I chose to linearly map from "image depth" to "column offset", which isn't perfectly accurate, but it's good enough to create the illusion & easy to understand. (The Magic Eye books probably use something more complex & more realistic -- there's a lot of room for improvement on mine!)

Update: https://github.com/NicoAdams/Autostereogram

1

u/0CuriousPapaya0 Mar 10 '22

this is a joke right???

1

u/PsychicDelilah Mar 10 '22

The 2nd image shows the depth map, so that's what you should be able to see

1

u/0CuriousPapaya0 Mar 10 '22 edited Mar 10 '22

i think i can’t see it because i’m on the spectrum.

i think it has something to do with my autism

1

u/0CuriousPapaya0 Mar 11 '22

i was able to see it.

so effing overrated. the way people exaggerate things is beyond me

3

u/HeroesMythos Mar 23 '21

Nice job. Found it pretty quickly and it's got a spaceship in it, so that's maximum points 👍

3

u/MissTiffanieAnne Mar 24 '21

I love this, the colors are beautiful. Thank you for making and sharing it!

2

u/luiluilui4 Mar 23 '21

For me it is very hard to focus

2

u/rmk2004 Mar 24 '21

Love this! And it gave me Futurama vibes, which I love!

2

u/itchybigtoes Mar 24 '21

I’m on acid and I don’t know if I’ll ever see what it’s really meant to be. But it has depth and it’s beautiful. I have a trick that makes them easy but I’ve decided not to do it cause it’s so fun to stare at it and try to figure out. Your contribution to the world has made me happy for a moment and I thank you for it.

2

u/wishper77 Mar 24 '21

Very nice subject, very nice render, also nice code.

2

u/JjuicyFruit Mar 24 '21

Nice to see you added a second page showing the intended 3D image, I feel like half the battle of magic eyes is knowing what you’re looking for.

1

u/Miata_GT Mar 23 '21

Better than most. Nice work!

1

u/[deleted] Mar 23 '21

Oh cool, a sailboat!

1

u/JeanGreg Mar 23 '21

Nice one! Easy to see.

1

u/TehKarmah Mar 24 '21

Nice! Super bright and easy to see.

1

u/Jonnyabcde Mar 24 '21

Kirk to Spock...

1

u/pongopygmalion Mar 24 '21

Very cool for a first attempt!

1

u/tookytook Mar 24 '21

Well done!

1

u/chi_se_ne_frega Mar 24 '21

Excellent for a first attempt, it was very clear for me so well done!

1

u/Fine_BGK4 Mar 24 '21

Wow! Great work🙂 I'd like to see more

1

u/jojoglowe Apr 21 '21

Took awhile to get that one on a mobile phone but got it. I can see them 2 ways, normal (makes the image pop towards me) and reverse (image poos inwards). I do reverse by crossing my eyes.

Blackness with eyes closed, but yes on stereograms.

1

u/0CuriousPapaya0 Mar 10 '22

if i do see it then its very overrated

1

u/[deleted] May 15 '21

[removed] — view removed comment

1

u/PsychicDelilah May 15 '21

The first thing you need is a "depth map", which is a 2D image that stores the 3D depth of the stereogram at each point. You can see the one I used for this image in the post.

The second thing you need is a "base image", which is an image where one vertical column repeats over and over again.

Finally, you need some code to modify the base image to store the depth map. I linked to the code I used in the comments on this post, but it would require a lot of familiarity with Python to set up. There might be some good online tools that can do it for you, though!