Weird POV effect
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- A short video demonstrating an interesting persistence of vision (POV) effect where objects being animated on a random field of black and white pixels are only visible when they're moving.
The graphics were generated by a simple Win32/C++ app that you can find at github.com/Chr...
EDIT:
Some related stuff that has come up in the comments:
Bad Apple but it disappears if you pause it: • Bad Apple but the blac...
A game called Lost in the Static using a very similar effect: silverspaceshi...
That game's dev credit's Sean Howard for the idea: www.squidi.net/...
I've learnt so much from stuff these comments, thanks to everyone who took the time to add their thoughts.
![[Full Episode] The Restaurant War Thailand ศึกพ่อค้าซ่าแม่ค้าแซ่บ Episode 2 | 29 ก.ย. 67](http://i.ytimg.com/vi/r3lfLNH6Ke4/mqdefault.jpg)
This is how we will communicate to each other when the robots are watching
Actually it would be quite easy for a robot to decode our messages, since the rules are known. We would just need to look at the pixels, and then compare the two frames. That what changed is the drawn line. Even if the static changed every frame so black turns white and vice versa, it would still be easy propably.
@@birnensosseyep, when AI can do everything a person can, we're just a little screwed
Literally just XORing two consecutive frames would reveal the pattern immediately.
Here’s the truth table for xor (exclusive or):
True xor True = False
False xor True = True
True xor False = True
False xor False = False
Basically, if the pixel before is different from the pixel previous, it’s true and if it just stays the same it’s false.
Hope this illustrates how insanely easy this would be for computers to decrypt. Computers can see the hidden stuff in this so much easier than humans can.
the robots have POV too (i made them >:3)
Imagine some torrent-like network where you receive only a frame per minute or some, so people would be able to exchange the whole videos but none of the middle nodes would have any data that would make any sense by itself.
I feel like such a T-Rex right now.
Well, I hope you get one although I'm not sure where you'd get one at this time of night.
@@undercoveragent9889
Underrated comment
hmm..
T Rex actually had really good eye sight, comparable to a bird of prey and it isn't based on movement.
Jurassic Park lied to you and velociraptors are the size of turkeys too.
I find this an excellent and creative way to demonstrate how human perception is very good at detecting changes (on the contrary to absolute values). We cannot detecr the line after the video is paused because there IS NO line. The change itself however happens in the shape of a Line. So it's the change we detect.
It worked, and at the cube part I went into fullscreen and unfocused my vision while still looking at the cube and it created this really cool effect like I was in a room with this static, also unfocusing my vision allowed me to still see where the cube is, but as soon as i focus again, it just dissapears. Very cool.
Thats why its so much easier to detect something moving compared to something completly still.
Essential this is "Motion detection", but it ties into some aspects of how we perceive images in general.
Basically, we get desensitized to images that are not moving, and our eyes have to make small movements to continue to see any static or unchanging image.
If you stare at an inverted image for a whole minutes and make sure your eyes do not move, and then quickly look over to a blank wall you will briefly see the positive image.
I think that this how our own imaginations work.
A lot of times when artists try to envision things three-dimensionally , they can only see them for a split second. That is why it’s hard to hold three-dimensional images in our minds when we try to remember them over long periods of time.
No matter how much I use my Magic Eye skills, I still can't see the lion
This is a migraine in video format
If you are watching on a phone, try shaking your phone while the line or cube moves. Since the whole image is now moving, the image also disappear, and it reappear as soon as you stop shaking the phone
for some reason I vividly remember you from the credits of the mentalist...
It also disappear if you shake your screen while watching the video on your phone
Definitely interesting!
You can find "bad apple but you can't see anything when paused" or smth. That guy already made a bad apple cover on this topic. Btw, the principle of percieving a change in pixels is widely used all across image analysis in computer graphics but these ones don't use white noise. Also, there's also a cool effect about pixel changes in time that's been shown in posy's video called "motion extraction"
i wanted to listen some good music that's why i scanned your QR code :)
Now do this with text. You could have the text alternate pixels between white and black and it would be impossible to read unless the video was playing.
See 'Weird POV Part 2'!
I found this interesting
its not exactly the same, but it reminds me a lot of magic eye. check it out if u get a chance its really neat
I saw a chicken laying an egg?
That's certainly possible, particularly if you live on a farm...
super cool ty for sharing
Incredible
There was a short indie game called "Lost in the Static" which used the same effect for the whole gameplay, making it impossible to see anything out of any screenshots.
Thanks, I found it here: silverspaceship.com/static/
That game's dev credit's Sean Howard for the idea: www.squidi.net/three/entry.php?id=56
I've learnt so much from stuff these comments, thanks to everyone who took the time to add their thoughts.
@@ChrisBLong that first link seems to not work anymore sadly
@@krishc.8980 It works for me
@@krishc.8980it's working for me now
Works for me @@krishc.8980
if anyone gets aura migraines, this really reminds me of how those look. it has this effect of a line that's not there but still flashes at you on your vision
Thanks for the comment! I don't get migraines, but people I care about do... this seems like a very useful insight. Perhaps something about a migraine causes the same 'something changed' neurons to fire when they shouldn't.
@@ChrisBLong i get migranes with the scintillating scotoma aura, within the field the visual information is lost, like an extension of the natural blind spot, and all you see there is a moving static like this.
You can see something similar by rubbing your eyes with a lot of pressure.
@@AlexanderTzalumen is that why it looks that way, it's visual information being lost?
Hey, I have an ocular condition called "Blonde fundus" that often (and I mean VERY frequently) causes aura migraines. If you suffer such, you might want to talk to your optometrist about getting an AMBER 3 lens for your prescription. It's not a normal lens, and as such they will almost never be even mentioned, let alone on hand, but it works by shifting a few frequencies of light and can help a ton.
Doesn't work for everyone, but for some folks, it's a life changer. Me? I went from migraines several times a week and a continuous and persistent low grade headache to only really suffering a migraine every few months. Cuts down on the afterglow/aura effect quite a bit too, although pinks/neon orange tend to flip, blues and greens tend to flip, and some shades of yellow are absolutely invisible.................. don't expect to see yellow paint on cardboard boxes for example, but it's SO much better than living with debilitating pain if they work for you.
Some optical plans even cover them, though if not, they are pricey (around $300 per lens without coverage).
@@kimudo thanks, ill have to check that out... for me i don't get them that often... leaning on maybe once a month to every few months... or at least that was the case. last week i had three... i thought it was just stress related, but who knows. either way i got my rizatriptan prescription refilled to help with that and that's been doing wonders.
Impressive, the bit rate did not ruin the video quality.
one major step in video compression is taking the difference between consecutive frames, the moving line in a non moving noise, and a moving line with no noise would have the same bit-rate
@@MartinDxtI'm also sure that it being black and white might help quite a bit, I assume that most codecs would have some sort of grayscale optimization
TH-cam seems to do a really good job at monochrome compression. In fullscreen, at 1080p, this video looks as sharp as an uncompressed video, those edges around the pixels are so crisp!
Few elements are moving
The pixels are much larger than the actual video pixels.
Small TH-camrs have no business being this eloquent
Thanks!
If only big TH-camrs were half as good as this.
Fame does not denote intelligence, many youtubers are intelligent with small audiences.
@@BonesMcoy🤓
@@agustinbarquero8898…what?
There are a few Bad Apple videos that uses this principle.
Thanks for the comment. Can you link Bad Apple videos? I'd like to see them. I hadn't heard of Bad Apple before - I found some cool/trippy videos but none using this effect.
That's awesome, thanks! There's nothing new under the sun, I guess.
@@ChrisBLong For the litterature you may want to begin by this article: Detection of Moving Local Density Differences in Dynamic Random Patterns by Human Observers. To my knowledge, most of the research on the topic has been done in the 80s-90s.
Bruh you read my mind
I came here from a bad apple video.
another thing that's interesting is if you skip by several seconds at a time, you see the shape that is essentially the sum of the movement during that time
that's awesome
Ohhh that's fascinating
this is very cool
That is great!!!
Thanks for highlighting that
It's even stranger when you blink very quickly while watching, it's like the cube doesn't fully render in your brain
That is pretty neat, thanks for pointing that out!
That is a really interesting observation, thank you! It only works (for me, at least) when blinking very fast. It's like your brain forgets the current state of the screen every time you blink, so the change of state doesn't register. This must tie in with the idea of 'saccadic suppression' which is a crazy topic in its own right.
there's no rendering or states, your brain or your visual cortex no longer has any "motion" to point out if you blink
Holy
omg :D
This seems like an example of the Phi Phenomenon, or autokinetic effect. It's not something I've ever seen done with visual noise or staric like this before, so props to you for having a unique spin on it. I vote that since I'm not finding anything specifically noting the effect related to visual noise, that you get to be the one to name it
I imagine this was important for our ancestors to be able to spot predators in the jungle. Super cool effect though
Exactly my thought. This feels similar to what a snake might look like in the brush. You can't see the snake itself particularly well, but the colors are changing in the pattern of a snake
Whole species of protohominids were wiped out during the great wireframe cube epidemic of 12.8 million years ago.
@@oryxisDINOSAURS SCORED 800 BILLION TO MALARIA 😂😂😂 TRY HARDER NEXT TIME LOOOL
i mean... not sure. Do you see tigers running a lot when they stalk? They tend to be still. Humans see movement, in fact most prey animals only detect movement but when the tiger moves its probably already too late to flee.
its been well reasearched that humans are really good at spotting diffrences like this
There is so much to hate about TH-cam, but reading the comments here has been amazing. One guy made a video about a cool thing he noticed, and lots of comments appear talking about related stuff, and explaining various ideas. I wish more online interactions were like this.
That is what TH-cam used to be like in the early days. There was even an option of making response videos that were directly linked to the original; you could have long discussions in comments, illustrate a point by making a video of your own.
@@nuclearmedicineman6270 Yep, I dearly miss the early days.
the good old days when people were actually talking about the video without mentioning how "underrated" every channel they stumble across is
It's not a TH-cam issue, it's a content issue. The comments sections of other videos like this tend to also be like the comment section of this one
This channel's comment section is still good because the YT sensor ship algorithm has yet to dock here.
This would make a great windows 95-era screensaver
I remember as a kid looking at a tv tuned into static and every so often the static would look as if parts of it were spinning round even though it was just random. No idea why. This vid is fascinating though and definitely something I've never noticed before. 😎👍
Scrolling through the video's timeline turns the cube into a sphere. 👌
Omg good find! So cool
That makes sense because any 3d object being rotated on all 3 axis unevenly, that object would only exist in a certain sphere around it.
Yes it does
not quite. It's more like a vague irregular hexagon, because that's the outline the cube boundary makes.
Interesting but different effect. This is more to do with video compression and how highly compressed videos like on TH-cam handle drastically changing frames. Still very cool though.
Every time I pause, I still see an after-image until I look directly at where the "line" last was. Then it disappears.
lol love the hidden QR code at the end of
I like to reward those who watch to the end :-)
Whatsit say?
@@Apersonl0lnormally I'd save you the trouble but this is one of the things you'll have to experience for yourself by scanning it
@@Polar_Onyxyou really do have to see it to believe it.
@@ChrisBLongBravo
The visual system detects more than just brightness and color. Motion is a major component of the visual information transmitted from the retina's neural mat. This is less a persistence of vision phenomenon as it is a showcase of how sensitive our eyes are to motion, even in the absence of coherent and persistent visual markers. Still very neat though. Pure motion information.
Technically, our eyes are not sensitive to motion
@@SioxerNikita They very much are. Not as sensitive to it as other animals, and if you're talking only of the retina and not the neurons that measure it then you're correct, but the composite structure of the eye is very much sensitive to motion.
@@Teth47 The structure of the eye itself is not sensitive to motion, that is the visual cortex actually handling the input coming from the cones and rods in your eye.
It is a technicality since that is in the brain, not the eyes itself. The eyes is not much more than a camera.
Motion Detecting cameras is not really a question of the sensor itself, but rather the software inside.
@@SioxerNikitaFalse. You eyes contain Direction-Selective Ganglion Cells that fire when objects move in their preferred direction in the visual scene.
@@SioxerNikita It's weird to me that people will continue to be confidently incorrect when Google exists and you can just, like check. Seriously, google it, the first result is a whitepaper about the neural circuits on the surface of the retina that sense movement and transmit that data to the brain.
The eye detects chromaticity, luminosity, contrast, edges, and motion right at the surface of the retina, the brain works with that input to segment the visual field into objects and determine their distance, size, motion, and direction.
The eye is MUCH more than a camera, even without the brain.
1:28 _"You're not seeing a line, you're seeing a line of pixels changing from one state to another..."_
Yeah, that's still a line. You even said so yourself.
Agreed, that's why I said it.
This is a well known property of the xor function and is commonly used for encryption. Let’s say you have plaintext, P, and you want to encrypt it. You XOR it with a random encryption key, E, and that will give you the encrypted text, T. To get P from T, you just XOR T and E again. This is what we’re doing: the line at one point in time is XOR’d with the random image at that point in time, giving us the image at the next point in time. Both images are completely random, but because we have T (the image at the second point in time) and E (the image at the first point in time), we can visually XOR them to get P (the line location). When we pause the video, all we’re doing is removing our access to E, thus making T incomprehensible.
This is such an interesting way to describe it but it makes sense. A visual xor
One-time Pad (visual edition)
Cool discovery! This effect reminds me of stereograms: Your technique creates images that can only be seen in motion, while stereograms creates images that can only be seen when two images are overlapped.
Of course the two could be combined to e.g. show a spinning cube with stereoscopic depth effect. Without eye crossing you would see two spinning cubes from slightly offset angles.
But I wonder whether we could combine the two techniques in a way that shows the cube (line) _only_ if the image is _both_ animated and overlapped. We would need to create some subtle correlation between the left and right frame that is only visible in motion when overlapping the frames, and not visible when overlapping them without motion.
this is a really interesting effect. blows my mind that everytime I stop the video, I loose the shape immediately
Your brain is an amazing thing.
_*lose_
@@nagualdesign It is too loose to lose. Count the 'o's. Of course, this assumes you know the difference between to and too, which I realize these days isn't a given.
@@darrennew8211 Of course I doo!
Because there isn’t a shape. It’s just changing the pixels of the imaginary shape, but the still image is just static. You’re following the 1-0 swap, not any image.
This may become an important topic in AI. In 3D samples (aka videos), their latent space representation should be able to encode changing random patterns. Using your observation, you could create training samples with the moving lines as ground truth labels. Probably deserves a paper :)
Or it can be done with a simple exclusive or with the privious frame
not weird at all, mammal perception is oriented around motion, i think its rods that are primarily responsible, so it works quite well outside the fovea
I wonder if there's a limit in pixel density where this effect stops happening. In super high resolution, we can't see the individual pixels, so would we see the motion image? If so, would the image appear finer, as a slight color change, or fainter? And how would this apear with greater amounts of colors? There's so much to learn about how resolution effects this phenomenon.
I'm playing with that - I expect there's a limit where your eye can't see it, even with a perfect lossless video display, but there's also a limit for these online videos where compression artefacts start to interfere with the low-res pixels...
there absolutely ought to be such a limit but I suspect it's higher than our ability to differentiate between *static* pixels. I.e. I'm guessing if you have perfect binary white noise so fine that it looks uniform grey to you, you could *still* detect moving shapes for a bit, before it's truly gone.
Very curious if that hypothesis turns out to be true.
It'd be a bit like how you may not see much of anything in the dark at night, *unless* there is motion.
Compression really makes it tricky though. In both directions. A compression algorithm may just make it *actually* uniformly grey, losing the pixel-level detail, or it may spot and emphasize the motion, making the shape visible even when pausing, depending on how it happens to be lossy...
It'd probably be easier to have like a demo website that calculates the thing on the fly in browser, needing no compression but also not a whole lot of space
It's like a random dot stereogram but without having to cross your eyes. Interesting.
Definitely seems related to stereograms
Yes, in a random dot stereo pair picture (not a single picture auto-stereogram) each side is completely indistinguishable from a randomly generated field of dots. The information about the 3D subject is only there in the combination of the two pictures.
Everybody in the comments section talking about serious/technical subject matters like how to evade our AI overlords/ Aura migraines/ Phi Phenomenon or feeling like a T-Rex etc. Am i the only one who's thinking how to utilise it for dramatic horror effect. Thinking along the lines of the flashing images of Pazuzu from the Exorcist movie.
Specifically about how in good ole VHS days before we were able to capture images/pause more easily, back then people would pause at that exact fraction of a second to see that image of the demon. Now imagine how freaked out they would be if, even in pause mode it disappeared before their eyes. Cue sinister laugh :)
It is a known effect; shape from movement in camouflage is the informal name. Notice if use equilumimant blue and yellow in a dark room, the effect will go away. You can tune on color while the other moves until you find a purple that destroys the effect. There has been some work on unconscious detection of shapes even in this invisible equiluminant case which is very strange too.
This is perceived by the magnocellular visual system (perception of motion), not what is called the parvocellular (which perceives color and detail). We use this in eyecare to detect early glaucoma using FDT (frequency doubling technology) visual field testing.
Finally someone who knows what they are talking about!
So you’re telling me that I can have line - unlimited line… but no line
but UNLIMITED LINE (I love your comment, thank you)
Interesting!
But have you considered that you would have unlimited line?
@@thc27500 I want to have both. I'm just thinking - is it possible to make a computer graphics system completely based on this?
@@aniksamiurrahman6365 asking for both is too greedy, that's what happened back in '99
Congrats on getting picked up by the algorithm. Here’s a comment so you get some extra engagement points.
I would love to see more videos like this! I’ve been wanting to write a book on noise for some time, and I think something like this would fit in super well!
Thanks for the comment!
I'll thumbs up your comment for more engagement and respond to it too!
This is how T-Rex vision works.
in Jurassic Park only. In reality, T. Rex had some of the best binocular vision for a land based animal ever. A T. Rex could spot you from 3 miles away and stalk you
... in Hollywood.
The interesting thing I noticed about pausing on the cube versus the line is that the line disappears into the noise immediately, whereas the cube slowly fades. It seems like, the more complex the pattern, the more points and variation your brain and vision have to hold on to.
I didn't notice until I read this, but this is actually the same effect as Pareidolia at play when looking at the cube. While commonly known for how people see faces where there are none, it is the same effect for why we see clear images in a popcorn ceiling or clouds.
It isn't there, but the brain insists it is until it is able to process the entire shape and find nothing. The more complex shape likely takes slightly longer to process. Likely a result of the "edge finding" trait that another commenter talks about. Think about it like this...We can see a moving creature in the forest only because it's moving, and when it stops, our brain knows something is there, so you keep seeing it, but you can point it out to anyone else and they will never see it unless it moves again. And what's really interesting is that if you keep looking, you will continue to see it, even if it actually isn't there at all.
Same thing for me. I could see the cube for almost a second before it disappeared.
Yeah I noticed that too. I thought it was just my eyes doing a brief retina burn in from stopping the motion or my brain attempting to (what it thinks might be) predictive continuation of the animation even though all movement has stopped. Quite a weird side effect all the same though.
Glad I'm not the only one that observed this effect.
Same here! And good explanation
When I was a kid I could sweari saw patterns like this in tv static. It's probably a paradolia-like effect of my brain trying to make sense of adjacent pixels changing, but it was still interesting.
I don't often see static anymore, but even now if I stare at it for long enough I'd swear it looks like a flat image of static being rotated rather than it being actually random. I believe it is random but like you I think my brain is just finding a pattern where there is none.
@@paws27 yeah i see 'rotation' (like all the static has a direction its moving) or i see lines and blobs moving through a background of static
This has to be one of the most elaborate Rick Rolls I've seen so far
This is about the QR code at the end of the video isn't it? I didn't scan it but I wanted to see if someone said what it was in the comments
This is called Chris Long effect
Teacher: "You've crossed the line this time!"
Me: "or did I?" 😏
What's even more intriguing to me is that after having paused the video, I can still see the line or cube for about 2 seconds, after which my brain kind of gets tired of looking at the mess and the shape fades.
You're not drawing lines, you're inverting pixels along a line. In the special case of a blank background that happens to result in a line, but for noisy backgrounds it just results in different noise. You're not drawing lines, you're drawing *change* and when it's paused there's no change happening and nothing to see.
Correct, well done! :-)
I dont know if it's a similar principle but this reminds me of it. In my work we have test objects that we expose under X-Rays, and have to count the contrast details to judge the image quality of the X-Ray unit. I and my colleagues agree that it is much easier to spot the contrast details when it is a live X-Ray, as the noise moving around in the X-Ray image makes it easier to spot static pixels and thus the boundaries between the details and the background.
Interesting, thanks for the comment. I remember reading something similar years ago about some signal detection algorithm that worked better when a bit of random noise was added, but I don't remember the details...
EDIT: maybe this: www.ele.uri.edu/faculty/kay/New%20web/downloadable%20files/00809511.pdf
Great video, very interesting. ☺️😊😉😀😃😄😁😆📦📦📦📦📦📦📦📦📦📦
This gave me the idea that you could create a 3D game in which objects will only be visible when moving
This would probably be a pretty interesting idea
It sure is. What would be even more interesting if this was an overlay that can be turned on and off. I think it should be possible as there is only visual things affected and nothing else. That way we could in principle play any game like this.
and you have to escape from something but the only way to see it is to stay still 😀
I was thinking exactly the same idea. Imagine if your enemies couldn't see you if you didn't move.
It also goes invisible if you shake your device or head
Чёрт, это ПРОСТО И ГЕНИАЛЬНО! Скриншоты у "человека посередине"/трояна/руткита будут БЕСПОЛЕЗНЫ!
after reading the wikipedia page for 'Motion perception', i think the heading titled 'Second-order motion perception' is relevant.
the article defines as:
Second-order motion is when the moving contour is defined by contrast, texture, flicker or some other quality that does not result in an increase in luminance or motion energy in the Fourier spectrum of the stimulus.
which seems to fit what the demo shows
and it appears theres a huge amount of interesting reading to do, like the different hypotheses on how brains evolved to perceive such things.
this is my favorite kind of youtube videos, simple, unique and great jumping off point for researching
Subliminal pattern recognition, an ancient survival instinct. Shaking your screen will diminish the ability to sharply recognize the change. Weird stuff!
At one point I studied computer vision back in college where I learned about the concept of "edge detection".
Edge detection is a type of pre-processing that our vision system performs automatically, we don't even perceive it. What it allows us to do is to denote the boundaries of objects very clearly. Without it, you would not be able to simply look at a table and quickly identify all of the objects laying on it such as pens and papers. You would have to study it intently to figure out where the boundaries of different objects are rather than it just being obvious. Effectively it's performing a 2nd derivative over the luminous values in your visual field and noticing when the sign flips.
Edge detection (to my knowledge) works on static images so I'm not sure if this explains what's happening here. But it's possible that the sudden flipping of the pixel values in a row causes a strong activation of that edge detection circuit.
In this case it would need to first involve comparing the two images and then determine if the changes constitutes edges or not.
I think that is where more advanced computer vision is expanding right now or at least need to, considering the problems self driving cars have with confusing some static images with real objects. With something that can identify where borders are your more likely to identify real 3D objects from flat surfaces, which is why some tricks work best through a screen where you cannot really get the full depth.
But it ads quite a lot of extra complexity and more ways to identify things.
This is similar to Edge detection but it is detecting edges not in space but in time, in other words we are detecting motion or change.
I also took a computer vision class in college and this reminds me of the term "optical flow", which basically concerns the difference between frames.
@@lukasegeling5205 Thanks for bringing up this concept. It's interesting though that no pixel is actually moving at all, just the line of pixels is simply flipping its state. But perhaps it's tricking us into "seeing" movement which isn't there?
@@LostieTrekieTechie Well put. Something like temporal edge detection maybe 🤔
I know that I've realized an effect similar to this irl, but I can't exactly pinpoint what the effect was. Good video though!
The algorithm has blessed me today. Top video.
Could this represent some kind of ultra-hard puzzle? Something tells me that there would be a way to find out which exact lines composed the full image of white and black dots. Not sure how but i feel like there's a way. Could it be?
Me scanning every single frame to make sure it’s not a rickroll QR code…
Me seeing the qr code at the end of the video and knowing exactly what it is
Isnt this just persistence of vision. Like when you see tires on a road and it appears to roll back or stop based on its speed and design?
Like Helicopter blades and when you hold a pen you jiggle it really fast and it seems to be bending?
I remember having to learn that as a software developer for Arduinos and LED lights to save wires. Basically its how all Monitors work, scanlines of daisychained chips that turns on and off really fast because your eyes cant conceive it.
Its the effect you see when you film a stoplight with more frames then the stoplight uses.
We call it relative motion. The relative motion of all the pixels "moving" give a directionality -- causing a "vector" to appear as a LATENT image in your visual cortex.
This is called optical flow. It's actually, exactly how our brain perceive movements in reality, that's why it works so well
How does this not have more views? Great video!
It could go viral, it's only been two days
Thanks, the short version has done a lot better, I'm hoping the algorithm notices this one soon...
Thanks, I think it's a cool effect, tell your friends 🙂
wow i didn't even notice this had under 1k views until u pointed out. I could've believed it had millions. It's obviously not high production or anything but short and simple informative videos like this do very well all the time
@@ChrisBLong Hey Chris. Just want you to know that these are called Autostereograms, more famously known otherwise as the Magic Eye effect.
how it looks to visualize things inside my head
I don't think it's entirely a brain thing, I think it's light staining of the eyes. Whatever was white, would turn to black, but your vision would temporarily see the white staining, and whatever was black turns white is immediately registered to the eyes.
This is probably the best example I've seen of something that comes close to depicting how aphantasia affects me. Though for me it's not just black & white, there's random colours mixed in as well.
For anyone wondering, aphantasia is a condition that affects one's ability to picture things in "the mind's eye", or "visualisation", or whatever. Supposedly, most people can visualise things fairly clearly, some can't see anything at all, & some of us are somewhere in between.
I think that you're demonstrating temporal coherence; the image is incoherent until considered from a temporal frame of reference.
In other words, the image is inferred by comparison of the change between one frame and the next. I imagine that this is essentially how we perceive motion even over luminance, colour, or shape. Think about how many times you've seen something move without being able to describe it: it was gone by the time you reacted or focused on where it was.
I think this is a cool demonstration of the complexity inherent in 'teaching' AI to generate videos with details that are temporally coherent; our brains are just so acutely tuned to identifying patterns and their temporal transformations.
This is standard persistence of vision that is well studied and know. Persistence of vision allows you to see a series changing pictures as a smooth video.
You should try with red/green of equal intensity instead of black/white, maybe it won't work for that.
Bro rick rolled us in the QR code at the end
It's still there, it's just hard to decipher where. It's the redraw line. It's like horizontal screen tear while gaming. But of course if this were not an indistinguishable white vs black dot array, it would be easy to see.
I believe this effect has been researched although I don't remember the name now.I believe what is happening is that, during the split second in which the pixel changes, our brain processes the change, and then we try to analize the context in which the change happened, so we basically "fill" the line and understand it as a whole. The best comparasion is:
Imagine three equal triangles fscing upwards spaced away from in a manner that they don't touch each other, two of them are aligned by the y axis at a lower level of the screen, the remaining one has its center aligned with the middle point between the lower two by the x axis. Although the three triangles are not touching each other, and are just three triangles scattered in space, the alignment leads our mind into interpreting that alignment with the idea of the three triangles being parts of a bigger one. Another great example is this: imagine you have an equilateral triangle facing upward, now cut two small segments of the same length and at the same height on the two lateral sides of it, and a bigger one on the remaining side, this should make it look like there's another triangle superimposed to the existing trisngle, but facing downward, even though there is none. The principle works similarly here: our minds notices the change in pixel colors(I believe it is due to visual permanence as you said), we interpret these changes as being part of a bigger context, which allows us to see the line and the cube. It is an optical ilusion, but the main diference is that the way our brain is processing it is actually anchored in the reality of the change(that being the fact the pixels are actually a line), instead of just some misinterpretation our brain makes. Really great video.
I would say that it's not quite accurate to say that "there is no line". There is a line that consists of a sequence of parellograms that fit each other perfectly and alternate between black and white. It is just that these pieces are sufficiently small and irregular that an individual piece is as small as the background, so when it is the same color as the background it is very difficult to spot. This issue is enhanced at poor resolution where the theoretical parellograms are broken into square pixels that can't do diagonals well. I'd like to see this demo but with a pixel shape that still tesselates but can produce other angles, such as the hexagon, and see what happens when you restrict the line production to the 6 angles where the line of pixels is unbroken and 1 pixel thick.
If you ran the same line program step by step, but instead it changed white to red and changed black to blue, it would be easy to see the lines until the majority of the background was converted to red and blue, at which point the issue reappears.
You might also try XORing in a reasonably complex black and white bitmap on that noise image, and see if the brain catches it - briefly. Might not even need to animate it.
This is actually a very cool effect it is known about but i don't think it is very know also I'm not 100% sure if there is a name or not though.
That's motion perception isn't it? The thing that makes cats so good at hunting and so atrracted to fast moving things. Humans are hunters as well, and we have motion perception too. Maybe not as good as cats.
it's really odd that if you follow the cube for a few seconds, then hit space to pause without changing vision, you can still make out the cube, even seconds later, until the moment you try to shift your eye from one part of it to another, then the whole thing disappears instantly.
The cube or line only exists as a concept of change to the background, rather than its own distinct shape. When you pause the video, you pause the change, and thus the cube is no more.
I think its because eyes register color changes and moving objects so good you see it for a bit but as it stays still it goes away
Side note: if you get 20x20 pixel all the same color but one is like barely not the same color that you dont notice it, and change it to each pixel alot you can see it
If you run your cursor over the watch bar on the video, you can also see just how the line and then the cube change the image as a whole. it's fascinating.
Very cool, I sent the link to Steve Mould, hope you don't mind :)
Maybe this could have application in the fields of compression / cryptography 🤔
0:57 the realm of missingno.
Nice. I notice moving lines appear a bit thicker, I thought at first because the old line was being undrawn, but that turns out not to be the case. Could be interesting to see the results if you did undraw before drawing the next one. Maybe it’s a slow LCD transition or a limitation of this mode of vision. Another thing is that smooth pursuit still works, but if I fail at that and have a sequence of saccades trying to catch up, it flickers in and out of existence.
Several times I paused it and still see a line / rectangle. So what's the effect supposed to be ?
This kind of visual effect emphasizes the potential illusionary nature of reality.
this is scary
This must be how the T-Rex saw the world in Jurassic park lol
Neuroscientist here. This is called second order motion and many insects can see this kind of second order motion.
Cool computer graphics
The video thumbnail makes me flashback to my first colorblind test for some reasons lol
had a seizure watching this
I actually died and was resurrected😂