[HN Gopher] How to Make Your Own Spooky Magic Eye Pictures (Auto... ___________________________________________________________________ How to Make Your Own Spooky Magic Eye Pictures (Autostereograms) Author : jstanley Score : 132 points Date : 2023-10-22 18:43 UTC (14 hours ago) (HTM) web link (blog.demofox.org) (TXT) w3m dump (blog.demofox.org) | PaulHoule wrote: | Nice, but I still like making red-cyan anaglyphs | | https://en.wikipedia.org/wiki/Anaglyph_3D | | though I think the premium way to enjoy stereograms in 2023 will | be with a VR headset (no fan of Facebook but I just got a Quest 3 | and wow!) | cubefox wrote: | Unfortunately they are hardly making stereoscopic movies | anymore. Maybe they come back with VR though (doubt it). | eru wrote: | Well, there's always porn. They are always on the forefront | of technology. | ksaj wrote: | This was interesting. | | Stereo wideners (a switch made to cause music to sound wider in | audio 3D space) work very similar to the Dolby3D, except with | equalization instead of colour filtering. | | Dolby3d takes chunks of red, green and blue, and filters them so | the left and right eye are seeing slightly different reds, greens | and blues in a way that isn't easily detected by the person | viewing them. Both eyes see apparently normal views, but together | they see a stereo image. | | Stereo audio wideners take a set of audio frequencies, lowering | their EQ on one side while raising them an equivalent amount on | the other, so that the left and right ears are hearing different | equalization that still sound reasonably normal. | | It makes sense that Dolby is the primary name associated to both | technologies. They are pretty much the same left-right reversed | comb filters, except light frequencies versus sound frequencies. | ZeroGravitas wrote: | > Lastly, I think it would be really neat to make a game that | used this technique to render 3d. | | See the 1994 game "Magic Carpet" for this and some other weird | 3D-modes including an early VR helmet. | | edit: the only brief clip I can find online that actually lets | you experience the effect: | | https://youtu.be/3qiIXbfQjA0?si=NLKv8Bs3EyW-lZX4&t=62 | | but I did find a modern platformer: | | https://managore.itch.io/stereogram | ciroduran wrote: | I once a game designer why they implemented autostereograms on | Magic Carpet and turns out it was the whim of a programmer :) | https://twitter.com/BulkPaint/status/1617192325091819520 | dwighttk wrote: | I can only really see these things crossed instead of parallel... | makes all of these push into the screen instead of jump out. | ozten wrote: | One of my favorite types of Autostereogram is the Object Array | Stereogram, because they are well rendered as 2D images, but when | you switch to the correct focal distance, you get an amazing 3D | experience. | | They have the built in constraint that you need to have rows if | identical objects, but that works quite well for chess pieces in | this example. | | https://en.m.wikipedia.org/wiki/File:Chess_Single_Image_Ster... | docandrew wrote: | I had a (really creative) buddy growing up who figured out that | you could do the wallpaper function in Mario Paint (which | filled the canvas with repeating icons) and then stamp over | some of the icons but slightly offset, and when you crossed | your eyes funny they'd pop out of the screen. Very easy DIY | Magic Eye. | marcodiego wrote: | The images he chose have too much fine detail. That makes it very | hard to identify what they are even when you "get" the effect. | anonymous_sorry wrote: | I always find this to be common problem with magic eye | pictures. The 3D effect is interesting to experience, but the | pattern is so busy and distracting that it's often hard to tell | what the object is supposed to be anyway. | | As a kid I had a book which had tried to address this problem. | The shape was still hidden but certain elements of the | repeating pattern coincided with and emphasized parts of the | hidden image - but in a way that wasn't obvious until you had | revealed the 3D effect. It was partially successful. | coxmi wrote: | Can anyone else not see the image? I can unfocus my eyes a | little, but what I think is mostly happening is that I'm just | slightly crossing my eyes so it doesn't work. | | Is it better on a non-phone screen? | smeej wrote: | Crossing the eyes tends to show just the outline of the shape | instead of a 3D image. | | The phone screen works fine for me, but a larger screen might | work better for you. It's more like a "zoning out" unfocusing | than a crossing of the eyes, like you're trying to look at a | point slightly behind your screen. | ghosty141 wrote: | Yes, a bigger screen helps a lot. There are a bunch of | tutorials how to get it to work on youtube etc. | somat wrote: | Does the effect work with an animated depth image? | | I always have a hard time with these. I get the 3d effect but can | never figure out the image. I suspect based on reading some | theory that I am viewing them cross eyed instead of slack eyed. | But have no idea how to do it the other way around. | | Update: it does, I found a youtube video, still cant resolve it | however. https://www.youtube.com/watch?v=IZpsbQMQFBs | ghosty141 wrote: | Thanks for sharing that video, worked perfectly for me. | Although watching videos with this effect is kinda headache | inducing after a while, at lesst for me. | hubblesticks wrote: | I have always crossed my eyes since the days of Magic Eye | books, and could reliably "see" the image but it was always | reversed (seemingly going INTO the page). It wasn't until this | article that I realized I could go "slack eyed" as you call it. | Now the images pop OUT of the page instead of recede into it. I | wish I could rewind 30 years and tell my younger self how to do | it.... I would have enjoyed those books so much more. | JKCalhoun wrote: | I flip the lid mostly closed on my MacBook and stare off at | something across the room past the laptop. While still | staring at that thing across the room I bring the display lid | up in front of my gaze. | JKCalhoun wrote: | This is a good one -- probably came up on an earlier HN post: | | https://youtu.be/2AKtp3XHn38?si=GDHjv1VyxCvMAzQU | eru wrote: | The video just animates the surface picture, and swaps between | different depth maps. But otherwise the depth maps are not | animated, alas. | | This one https://managore.itch.io/stereogram (link from another | comment) actually animates both. | jodrellblank wrote: | Linked video - these are some of the coolest I've seen in a | long time: https://www.youtube.com/watch?v=NmRfVoiFDu4 | | The almost holographic looking sphere and pyramid at 00:15 | seconds. | | The nested petal thing at 45 seconds. | | The Yin-Yang at 01:22 | | Here's soem cross-eye autostereo drone videos: | https://www.youtube.com/watch?v=QzyjLtzPDNw | netruk44 wrote: | The fact that all you need is a depth map of what you'd like to | create makes me wonder if anyone's ever linked something like | this up to a video game engine to make possibly the least | visually pleasing and least accessible game out there. | ClassyJacket wrote: | Yep, ZeroGravitas mentioned Magic Eye in another comment, also | this: | | https://www.rockpapershotgun.com/cross-your-magic-eyes-to-pl... | Tao3300 wrote: | Call it _Polybius_. | pfedak wrote: | https://managore.itch.io/stereogram is an impressive example of | the possibilities here, with an animated noise image and | interactive depth map. | a1o wrote: | I find these much easier to work on my eyes than the one posted | on the article above, probably because the side by side pattern | is easier to cross-focus. | adventurer wrote: | I can never see it for some reason. I assure you I just saw the | eye doctor and my eyes were also fine 20 years ago when these | were popular. | maxerickson wrote: | I have ~-1.75 in one eye and -3.5 in the other and it took me a | long time to eventually be able to resolve the hidden images. | They usually aren't all that satisfying really. | Tao3300 wrote: | They were always a lot easier to see framed so you could trick | your focus by looking at reflections in the glass. Ideal | conditions: printed at poster size, at a shopping mall kiosk, | near a trashcan with an ashtray. | Jare wrote: | The blue noise example is crazy. It's always been trivial to me | to cross-eye into MagicEyes, I can even comfortably scroll the | page and never lose the 3D. I had no idea there were (if I | understood correctly) adversarial background patterns. | dwringer wrote: | Interestingly, perhaps, I found that one to be easier to make | out the fine detail than any other magic eye that I've seen | before. However I did find it a bit more eyestrain inducing as | well. This is a great blog and makes me want to experiment | more. | g-b-r wrote: | You mean that you _do_ see the 3d effect in the blue noise | image??? | spandextwins wrote: | 1990s were fun times! | jrapdx3 wrote: | 3D images have captivated me since I was a kid. A frequent source | of amusement was the "Victorian wallpaper effect" and even | without a viewer I could easily see classic stereo photo pairs in | 3D. Not at all difficult to see the "hidden" objects in the | article's quite nice illustrations. | | While popularity of SIS imagery isn't what it was a few decades | ago, programmer interest in the subject has remained quite | strong. | | As an artist I enjoy incorporating SIS images in my work. In the | past I've used a number of open-source SIS generators. Mostly | these programs weren't completely satisfactory. A common defect | was producing SIS artifacts marring output image appearance. | | Subsequently I wrote a SIS program (with GUI for usability) [0] | that almost entirely eliminated artifacts in the finished images. | Developed with artists' interests in mind, its SIS output looks | different vs. examples in the article. (Using depthmap and | texture/pattern image inputs, the latter determines the "surface" | appearance of the SIS.) However both SIS styles have the same 3D | effect capability. | | [0] https://thinairarts.com/stereogram.html | andai wrote: | This looks great. You should add some more output images! | carapace wrote: | JITTLOV'S 3-D DOBBS BOBoBoBoBoBoBOBoBoBoBoBoBOB | oBoBoBoBoBOBoBfNoRdBoBOBoBoBoBoBoBOBoBoBoBoBoBOB !!!!!!!! | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | !! !::::'___`:::::::'___`:::::::'___`:::::::'___`:::::::' | ___`:::::::'___`::::! !:::'/_ _\`:::::'/_ _\`:::::'/_ | _\`:::::'/_ _\`:::::'/_ _\`:::::'/_ _\`:::! !:::|/ ~ | \|`::::|/ ~ \| `::|/ ~ \|' `|/ ~ \|::' |/ ~ \|::::'|/ ~ | \|:::! !:::|'-.-`| :::|'-.-`| :|'-.-`| |'-.-`|: | |'-.-`|::: |'-.-`|:::! !:: (|e|e|? ::(|e|e|? ' | (|e|e|? ` ' (|e|e|? ` (|e|e|?.: (|e|e|? ::! !. | `._^_,'' :`._^_,'..' `._^_,'`...'`._^_,' `..`._^_,'. | ``._^_,' .! !. \\=// \\=// \\=// | \\=// \\=// \\=// .! : U/_/ U/_/ | U/_/ U/_/ U/_/ U/_/ : @/ | \&~ @/ \&~ @/ \&~ @/ \&~ @/ \&~ @/ | \& Y/\.::./\S\ /Y/\.::./\S\ /Y/\.::./\S\ /Y/\.::./\S\ | /Y/\.::./\S\ /Y/\.::./\S E$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ | $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$E %%%%XX%%%%%%% | %%%%XX%%%%%%%%%%%XX%%%%%%%%%%%XX%%%%%%%%%%%XX%%%%%%%%%%%XX%WiZ | | https://www.subgenius.com/bigfist/eyes/Jittlov3-D-Dobbs.html | Tao3300 wrote: | The haunted house one faked me out. I thought I was looking at | https://davematthewsband.com/music/remember-two-things-reiss... | stuckkeys wrote: | First I thought...crap I need to go see an eye doctor, then | booom. The depth kicked in. My eyes got stuck lol. Trippy. Live | the effect. | grishka wrote: | These things never worked for me. Maybe I don't understand how to | look at them correctly to get whatever 3D effect they're supposed | to make, but for the life of me, I could never see anything at | all in those patterns, neither on screen nor when printed. | | edit: I found this video[1] with pairs of images that tells you | to hold sunglasses in front of your right eye if you can't | defocus your vision correctly. _This_ worked for me with an ND | filter, it really feels like it shouldn 't do anything but I did | see depth. Those patterns though, still no idea how to make them | work. | | [1] https://www.youtube.com/watch?v=mLsODo7ycaA | stiray wrote: | Actually I can also see this one, maybe becoase of the 3d cube | at the beginning that exactly shows you what to do. | | Now I will probably see everything blurred for rest of the day. | artdigital wrote: | Same for me, I can't see anything in those images. I have | astigmatism and red/green colorblindness though (which I | discovered later in life). Could be related? | g-b-r wrote: | I have astigmatism as well and it initially took me a very | long time to manage to see them, it might be that it has an | effect (I practiced enough that I then learned to see them at | a blink of an eye, and it helped my normal vision a lot btw) | grishka wrote: | I used to have really bad myopia, but right now, many years | after laser surgery, I still have nearly perfect vision. I | feel like my main problem is that I can't overcome my | reflexes. | rob74 wrote: | TBF, these "hidden" autostereograms are the most challenging to | "see" - it's probably better to start off with two "actual" | pictures printed or displayed side by side (because there you | have some cues to how far you are from the images overlapping), | and then try to apply the same technique to autostereograms? I | can manage to do it most of the time, but it always takes some | effort. I think it also helps if the image is bigger, but | YMMV... | mountain_peak wrote: | When my kids were younger, they used to subscribe to a children's | magazine that featured a monthly "spot the difference" puzzle. | They were amazed when I used to glance at the image and rattle | off the one obscure difference they missed. | | My trick was based on "magic eye" images I used to enjoy. When I | saw the side-by-side drawings used by the puzzle, I wondered what | would happen if I "fuzzed" my eyes as if I was looking at a magic | eye photo. To my surprise, all of the items that were different | between the two images "vibrated" or "shimmered", while the rest | of image stayed steady. I repeatedly fuzzed and focused to spot | all the differences in a matter of seconds. | satvikpendem wrote: | Yep, I do this too. One thing that's cool is viewing | stereograms that have differing colors. Some people apparently | can see new colors via this method that is not simply a mix of | the two colors. | antiterra wrote: | If this made anyone else curious, I found | https://m.youtube.com/watch?v=cQCsDfEqr9o from a post with a | 'blellow' stereogram | https://www.reddit.com/r/MagicEye/s/pd2FtY5PnY | | There's some skeptical commentary in the thread as wel. | Dwedit wrote: | I use this for diffing on a PC, such as when you have a hex | editor open that doesn't have a built in diffing feature. | jstanley wrote: | I find a good technique is to load hex dumps in vimdiff. | zzzeek wrote: | I can only see these dumb things in reverse (the shape is always | sinking into the page, rather than popping out). isn't there a | way to generate these inverted so weirdos like me can finally | enjoy them ? | g-b-r wrote: | You're crossing your eyes instead of distancing them, that's a | lot easier for me as well but you should manage to see these | kind if stereograms too with some practice. | | Simply letting your sight defocus as when you're looking into | the void thinking something will probably get you closer; then | keep in mind that to see these images you need to make a much | more subtle correction than when doing the cross-eyes thing, | such that it's actually easy to "bind" to pairs of patterns | farther apart than what's needed. | | The rest is just like with cross-eyes stereograms, check the | borders of the double-image to verify the alignment of your | head, and as you get closer to joining the dots strive to get | the image back in focus (but of course without moving the | eyes). | quickthrower2 wrote: | Wow, now that I need reading glasses these are easier than when I | was a kid | pbj1968 wrote: | Hyper Color tshirts reminded us we all had nipples and sweaty | armpits. | gaoryrt wrote: | My eyes have never been so itchy, thank you. | stiray wrote: | for those who can master it, here is Tetris to play: | https://www.deviantart.com/3dimka/art/3D-Stereogram-Tetris-3... | | I was never able to see stereograms, the most I was able to pull | out was to see it inverted (x seeing with eyes, while the | opposite is required). | g-b-r wrote: | I'm not an expert but I don't think you need to go to a doctor if | you can't see them easily, I think it's common for it to take a | lot of effort initially | | It actually might well be that people with sight problems will | have a harder, or a lot harder, time at first, but, yeah, with | enough time most will probably manage to. | | I think it took me weeks to start to see them easily, and | probably at least days to see one for the first time. | | By the way, from then on though, I became able to e.g. watch | stereo videos stereographically in a split second, from any | position (so long as I kept exercising every once in a while); so | it's probably just a matter to learn how it works and maybe | exercise the eyes a little, for most people. | Dwedit wrote: | Fractint was an excellent program for making Stereograms, and I | believe it can still be used for that task. ___________________________________________________________________ (page generated 2023-10-23 09:00 UTC)