I'm pretty sure the dots on your shirt are because of the way that plaid works. Also, they're brighter than the lines that intersect to make them rather than darker, making them inconsistent with the illusion you spoke of.
I agree, Hank's shirt actually has more white thread at the intersections, and those intersections are literally brighter than the lines leading to them. Though the individual threads may be the same color. At a minimum, the shirt is not an analogous illusion to the intersecting lines illusion.
your comment shows that you are a misagonistic liar and you propagate patriarchy! thats how lacy would react when you call her out on inconsistencies in her videos
The white squares are there. They are where the white vertical threads cross the white horizontal threads, and there are no black or blue threads present in those places. Through the rest of the white lines, there are darker threads interwoven. Yes, I don't see any "dark" spots there at all.
The spinning dancer, I found the direction of her perceived spin actually depends on which direction you first see her face in profile. Most people I "tested" said if the animation began with her facing to the left they saw her spin counter clockwise, and if the animation was started with her facing right, she spun clockwise! If you start it so you can't see her face and hair, I got the numbers you mention in the vid. I think its cuz people assume her first rotation would bring her face front rather than turning her back first. Now I wonder if that varies by gender, culture, and background?
I can switch the dancer to go either way but I don't know how I do it and I can't just switch, I have to kinda be rotating my head ever so slightly in the direction I want her to go and she eventually catches on and rotates the other way. And I don't mean I'm literally rotating my head 360 degrees, I'm just making a little circle rolling my neck. damn that's really hard to explain but so easy to do. Why am I telling you this, persons unknown? because I'm bragging. I can finally do something. I'm one of the chosen ones that can change her direction. When you're as messed up as I am, you've got to hang onto these small victories!
Clay Mann I can switch her direction on cue. Naturally I see her spinning counter-clockwise, but if I focus on her feet then I can make her spin clockwise. Fun fact: if you've ever played kingdom hearts, the heart that shows up when the game is loading works like the dancer illusion. I can switch the heart much easier than the dancer. I can even make it switch back and forth to the beat of the background music
Palapa69 Backup yeah I've encountered this before. There's a great train GIF floating around where you can make the train go forward or backward because not enough frames have been captured to really fill in what's happening. Ok I got off my lazy arse and found it. i.imgur.com/TnfzrDD.gif Remember, we are the chosen ones! Our special power? We are able to change the direction of a thing where the recording is too ambiguous to define its direction. Do not abuse this power!
The spinning dancer's really cool, it's quite easy to make it go in either direction by initially focusing just below the dancers feet before looking up to the middle of the dancer.
you know, I just started my paetreon subscription and now when you thank us at the end, it feels like I'm apart if this fabulous channel! I'm happy I can help you guys share knowledge to the world!
For Illusion #5: I don't know what effect aging has on perception, but I know that when I was younger, I could easily swap between seeing the dancer rotate in either direction (to the point where I would accidentally swap between the two without trying). Now it takes quite a bit more effort...
I see the dancer constantly changing direction, I wish she'd make her mind up and stick to it. I'm not trying to change it, but trying to keep it unchanging, if that makes sense. Hank's checkered shirts have always grooved my eyes!
Changing the direction of the spinning dancer it's pretty easy , just focus a couple of seconds on the foot's shadow or on her arms (depending on your starting direction).
My personal experience with Motion Aftereffect is from playing Guitar Hero for an hour or so. It used to trip me out I'd play the game and then just watch the wall slowly "move" upward it was kinda cool.
For the spinning dancer to spin in your direction of choosing: To see spin clockwise then cover top half with hand and focus on foot spinning on ground To see anticlockwise then cover bottom half with hand and focus on spinning chest If you are having difficulties then blink a few times and try again.
In theory, the "Flying Dutchman" should appear upside down. Exactly like the sky is "reflected" on the ground in a warm desert, the illusion is reversed by the multi-layered reflection in cold bioms. Was part of my physics exam when in high-school (even tho it was with a good not ol' steel warboat on the illustration^^) so I remember how it works thanks to that.^^
"I might seem like I'm moving around but I'm not. I'm just a series of completely still images flashing quickly before your eyes. Your brain is simply stitching those frames together to create the impression I'm moving around like I would be if I were right in front of you." But wouldn't my brain be doing just the same thing if you were in fact right in front of me?
Spinning Dancer has it's "body" shaped like it's moving clockwise, while it's "shadow" is shaped like it's moving in the other direction. If you see her moving clockwise, look at the shadow for some period of time, and you'll see her counter-clockwise.
The checkered illusion thing where you see white when looking directly at the corners and grey when you look away, when I stared really hard at my white wall, I saw the checkers!!!
I just googled the spinning dancer and the the first time I saw it, it was spinning counter clockwise. After I typed a comment that I was supposed to post here, I viewed it again and now it's spinning clockwise like how I saw it in this video. Then after I typed this, it's spinning counter clockwise again. Lmao.
Whoa. When I look at the Spinning Dancer straight on, I can only see her spinning clockwise, but when looking at her in my peripheral vision, she can spin counterclockwise. I don't know why this works and it's weirding me out a little bit.
1. ye 2. yep, although I call it purple. 3. no, you're not rotating or bloated. 4. That one is easy to dismiss. 5. could just be moving left and right... 6. my brain makes no assumptions, only observations. could be a shadow or a coloration error, who knows. 7. love the grid one. 8. mirages are feckin evil
Damn, for so long (at least any time it's been brought up) I've been trying to see the dancer spinning counter-clockwise instead, but I never could. Once it was stated here that those who concentrate on her bottom foot see it that way, I put my hand over the rest and imagined it going the other way and it worked! Anyone else who's struggled with that... though I doubt anyone would really call it a struggle lol, I suggest blocking out everything but the bottom foot until you can convince yourself it's going the other way, then the whole thing should fall into place.
The Flying Dutchman isn't the most famous maritime mirage. The Titanic hitting an iceberg is, although not all know this was the cause. The sudden channel of extremely cold air/water trapped beneath warm air caused horizon refraction(mirage) hiding a large iceberg which would normally be seen from 30 minutes away against a very clear star lit night to only being seen 30 seconds before impact. The same optical illusion(refraction) is believed to be the reason the California never went to aid the Titanic even though crew testimony from the California said the ship they saw wasn't the largest ship in the world, or they couldn't see the steam stacks of an ocean liner but a much smaller vessel, when infact it was the titanic.
As for the dancer, I never looked at the hand, always at the foot in the air. And I can swap her direction with a beat of mental concentration. So ignore the hand advice.
the dots on hanks shirt dont result from optical illusions but from the fact that at some point the horizontal and vertical threads of same color intersect. this results in the respective color being twice as intense. i wonder why he wants to make us believe its an illusion? does it run in the green family to try to lure ppl into a false reality? (see also lacy for further examples)
0:28 it's not an illusion that's how we see anyway we see, an image and then it gets updated every like 0.02 seconds (close enough for me, also I was talking about vision )
+SciShow I believe that Your attribution to the "herman-grid illusion" as an explanation of the appearance of Your shirt in at least this video actually is wrong. Now of course I can't tell what it looks like "in real life" nor how other people "perceive" it. How ever when watch this video, Your shirt appears to have brighter spots at the "intersections" of the "lighter lines", i.e. this is the "opposite effect" to what the "Herman-Grid illusion" would cause, And they don't disappear if I look directly at them either. And by taking a screenshot and measuring I could easily establish that this is not even an illusion, Your shirt (or at least the picture of it) has measurable lighter colours just where it appears to be brighter...So NO Herman-Grid illusion here... I would simply attribute the "brighter spots" to how a checker pattern of this appearance is actually woven. Any who, thanks for an interesting video
The spinning dancer looked diffrent To me as a kid, I remeber seeing it thinking it was spinning one why then a teacher told me I was wrong and I couldn't see it spinning the same way before and since then I've only seen it spin the same way
Hey so this retinal fatigue thing from part 2 must explain why I get bubble patterns of green and magenta when I stare at a blank wall on the back end of an MDMA "trip". I always assumed I was hallucinating.
This has nothing to do with this video, but have you seen any videos from the Crushit channel? In a video of theirs that I watched recently they crushed a standard deck of cards and it exploded. I was just wondering why...
at the dancer girl illusion i saw her spinning left...last time i seen it she was spinning roght....does this mean that your perceptions qre influented by some external factors ?
the checkered square looks more like a color gradient to me :/ and I used to be able to switch on the spinning dancer but it seems I can't anymore :/ why's that?
When mowing the grass, after stopping, it seems like the the world is getting "zoomed out" whereby the tractor and environment seems to be getting stretched and elongated. The closest thing that I can call this is the "vertigo effect" or "Dolly Zoom." As a kid, I always wondered why this happens when in the passenger seat of a car when coming to a stop, where it suddenly looks like the car is going backwards even when completely stopped.
Yeah. I've had this happen when using music visualization software. The first couple of times I used it, I was freaked out thinking "What's wrong with my monitor? Why is everything moving up?" Then, I realized that it was just my eyes playing tricks on me.
+thanrose -- No, I don't think it's anything like that, That problem appears to require a migraine, knock on wood, I don't think I have ever had a migraine. It's not randomly distorted perception, it is a motion exactly opposite of of the motion while mowing. Same effect as the spinning wheel illusion.
What a great question. I'm gonna guess no, because their 'eyes' don't have cones and rods, but I'm not a scientist. So far, the comments look so stupid...I hope your question isn't lost. Why don't you give yourself a thumb's up on your question and little by little, maybe we can push it upward and someone who can answer, will answer.
SlyPearTree I highly doubt it. As explained in the video illusions are caused by taking advantage of shortcuts in the way our brains perceive the world, along with fatigue as previously mentioned. But with either case it's caused by the brain comparing pieces of visual information and applying existing knowledge about how the world works. Whereas to an artificial eye and brain it's purely quantitative information - pixels and numbers. And it can't suffer from fatigue that would affect it's perception. All information is pure and direct, any comparisons made to existing knowledge is taken at face value, nothing altered to try and make sense of it. Because a computer primarily "thinks" in exact measurements, whereas we think in approximations and generalizations.
I imagine that making them operate with similarly "simple" short cuts as us would effectively improve their day to day ability to process visual information. These illusions are the rarity and acceptable errors when compared to just how quickly and accurately vision can be with animal brains, ours included. Trying to make things perfect would require insane computational power and slow things down to a crawl.
I do not believe there is an advanced enough AI vision system that exists to detect optical illusions much less know what is going on in a video or picture Object detection through pictures is one of the most complex problems in the computer science fields, and as far as I am aware the best method for AI to learn what is in a picture is through large amounts of test data in a neural network meaning it probably won't know what its seeing is an illusion much less an object it is familiar with.
Yes, no and it depends on the case and how you'd define the term "optical illusion". Not in a sense like the optical illusions that the human eye perceive(like the ones in the video) but since camera sensors and especially AI(AI is nothing more than a bunch of algorithms, there is no true AI) have their flaws so you can fool them, technically that would be sort of an optical illusion(just one not intended for humans). Take facial recognition for example, it can be very easily fooled by painting specific pasterns on your face, from the sensor/software perspective that would be an optical illusion.
Yep, the dancer was cool. First I wondered how one could see her on her right foot and then the arrows came and she started to move in the other direction. :)
Pause at 3:54-55 during the shepards table, and I have a problem with the illusion. You can clearly see that the perceived difference comes from the fact that the slender one if being shown from a specific angle to highlight one of its edges that seem to add to its length. The same thing is being done for the short one, but its angle is shown to highlight the edge on its side, adding to its width.
I have a problem with this illusion too, or maybe it's more with his explanation of it. When he says the table on the left "is much longer than it looks" doesn't he really mean "it looks much longer than it is" ? I think if photos taken from different sides of a real squarish table had been used instead of drawings this trip-up would have been less likely, but also the effect less surprising. Does that coincide with what you're basically saying?
The nearsighted make up around 40% of Americans, so we're not going to be the minority for much longer. :( We already make up the majority in some regions on earth.
I can see the spinning dancer spinning either way if I want to. If I'm not trying, I see her spin clockwise, but I can make her spin counter clockwise (most often by looking at her feet for a moment).
Same! Maybe it doesn't work in video format, or they sped up the animation so it's harder to change perspective. Either way... That one was bothering me too.
Huh, I used to be able to flip the spinning dancer at will. Like, it high school when this GIF went around I remember bragging that I could flip it and explaining to friends on one side how the other side perceives it...thing is, I can't anymore. Weird.
Certain optical illusions are harder for the aging eye. I used to be able to perceive and analyze many illusions, but as an old lady it's more challenging, sometimes impossible.
I can flip her but it takes some focus. Like I can't just swap my perception instantly, I have to stare her and think about how I could perceive her going the other way then suddenly she switches.
Oh i actually changed the way the dancer was moving. At first i thought it was the video but then i went back and saw she was moving counterclockwise but then i looked at my table for a split second and she started rotating clockwise...
*watching on phone*
*Hank says he's not moving*
*starts rapidly shaking phone*
tell me what's happening now, HANK*
R33KO I want this comment to succeed
+Swampy Mudkipz ^
R33KO *vigorously breathing* oh god!
*breathes harder*
send help!!!!!!!
Hank is not moving, the series of pixels that represent him are.
Sir Francis Lies, I bet he's moving *as we speak*
Hanks shirt looks normal to me 6:40
I'm pretty sure the dots on your shirt are because of the way that plaid works. Also, they're brighter than the lines that intersect to make them rather than darker, making them inconsistent with the illusion you spoke of.
I agree, Hank's shirt actually has more white thread at the intersections, and those intersections are literally brighter than the lines leading to them. Though the individual threads may be the same color. At a minimum, the shirt is not an analogous illusion to the intersecting lines illusion.
your comment shows that you are a misagonistic liar and you propagate patriarchy!
thats how lacy would react when you call her out on inconsistencies in her videos
That would be expected, since the background is inverted, light on dark.
Not saying you're wrong. I can't tell if the squares are really there or not.
The white squares are there. They are where the white vertical threads cross the white horizontal threads, and there are no black or blue threads present in those places. Through the rest of the white lines, there are darker threads interwoven.
Yes, I don't see any "dark" spots there at all.
The spinning dancer, I found the direction of her perceived spin actually depends on which direction you first see her face in profile. Most people I "tested" said if the animation began with her facing to the left they saw her spin counter clockwise, and if the animation was started with her facing right, she spun clockwise!
If you start it so you can't see her face and hair, I got the numbers you mention in the vid.
I think its cuz people assume her first rotation would bring her face front rather than turning her back first. Now I wonder if that varies by gender, culture, and background?
The waterfall effect happens when you just stare at the road as a passenger. That gives a nice warp drive effect when you are stopped.
That drives me freaking crazy when I'm in the car (no pun intended).
I like propellers and ceiling fans. Used to try to "catch each blade" as it rotated to a specific point and count them properly as a kid.
I can switch the dancer to go either way but I don't know how I do it and I can't just switch, I have to kinda be rotating my head ever so slightly in the direction I want her to go and she eventually catches on and rotates the other way. And I don't mean I'm literally rotating my head 360 degrees, I'm just making a little circle rolling my neck. damn that's really hard to explain but so easy to do.
Why am I telling you this, persons unknown? because I'm bragging. I can finally do something. I'm one of the chosen ones that can change her direction. When you're as messed up as I am, you've got to hang onto these small victories!
Clay Mann I can switch her direction on cue. Naturally I see her spinning counter-clockwise, but if I focus on her feet then I can make her spin clockwise.
Fun fact: if you've ever played kingdom hearts, the heart that shows up when the game is loading works like the dancer illusion. I can switch the heart much easier than the dancer. I can even make it switch back and forth to the beat of the background music
Clay Mann me too
Palapa69 Backup
yeah I've encountered this before. There's a great train GIF floating around where you can make the train go forward or backward because not enough frames have been captured to really fill in what's happening.
Ok I got off my lazy arse and found it.
i.imgur.com/TnfzrDD.gif
Remember, we are the chosen ones! Our special power? We are able to change the direction of a thing where the recording is too ambiguous to define its direction. Do not abuse this power!
Lucy zhang I see you have the gift, be careful who you share this knowledge with. There are those who seek to steal our power!
Thank you Hank, and all others invovled in making science even more enjoyable here on youtube for YEARS!! Awesome work guys. Greetings from Sweden!
The spinning dancer's really cool, it's quite easy to make it go in either direction by initially focusing just below the dancers feet before looking up to the middle of the dancer.
I didn't see dots on Hank's shirt... now I can unsee them.
I can too
you know, I just started my paetreon subscription and now when you thank us at the end, it feels like I'm apart if this fabulous channel! I'm happy I can help you guys share knowledge to the world!
For Illusion #5: I don't know what effect aging has on perception, but I know that when I was younger, I could easily swap between seeing the dancer rotate in either direction (to the point where I would accidentally swap between the two without trying). Now it takes quite a bit more effort...
4:24 Adolf Thicc
legend has it he had a thicc booty
Eddy Is Ready adolf fick
I see the dancer constantly changing direction, I wish she'd make her mind up and stick to it. I'm not trying to change it, but trying to keep it unchanging, if that makes sense. Hank's checkered shirts have always grooved my eyes!
Should've covered the McCollough effect, it is probably one of the coolest illusions around.
Changing the direction of the spinning dancer it's pretty easy , just focus a couple of seconds on the foot's shadow or on her arms (depending on your starting direction).
Love all the arm-waving. It makes him look so much brighter ... another optical illusion.
Freaking Dutch people and their magic ships...
My personal experience with Motion Aftereffect is from playing Guitar Hero for an hour or so. It used to trip me out I'd play the game and then just watch the wall slowly "move" upward it was kinda cool.
For the spinning dancer to spin in your direction of choosing:
To see spin clockwise then cover top half with hand and focus on foot spinning on ground
To see anticlockwise then cover bottom half with hand and focus on spinning chest
If you are having difficulties then blink a few times and try again.
In theory, the "Flying Dutchman" should appear upside down. Exactly like the sky is "reflected" on the ground in a warm desert, the illusion is reversed by the multi-layered reflection in cold bioms. Was part of my physics exam when in high-school (even tho it was with a good not ol' steel warboat on the illustration^^) so I remember how it works thanks to that.^^
"I might seem like I'm moving around but I'm not. I'm just a series of completely still images flashing quickly before your eyes. Your brain is simply stitching those frames together to create the impression I'm moving around like I would be if I were right in front of you." But wouldn't my brain be doing just the same thing if you were in fact right in front of me?
Spinning Dancer has it's "body" shaped like it's moving clockwise, while it's "shadow" is shaped like it's moving in the other direction. If you see her moving clockwise, look at the shadow for some period of time, and you'll see her counter-clockwise.
chackered square was very good example for me thx SciShow
I knew about all of these and the causes of them too. Fresh material please.
I managed to switch between the dancers! Science! Thanks Hank^^ T-Hank
watched that several times to try and see the dancer go the other way. Finally I saw it, then couldn't switch back!
The checkered illusion thing where you see white when looking directly at the corners and grey when you look away, when I stared really hard at my white wall, I saw the checkers!!!
I just googled the spinning dancer and the the first time I saw it, it was spinning counter clockwise. After I typed a comment that I was supposed to post here, I viewed it again and now it's spinning clockwise like how I saw it in this video. Then after I typed this, it's spinning counter clockwise again. Lmao.
Whoa. When I look at the Spinning Dancer straight on, I can only see her spinning clockwise, but when looking at her in my peripheral vision, she can spin counterclockwise. I don't know why this works and it's weirding me out a little bit.
Hank Green is an optical illusion created by the production team animating images of a guy in glasses - a kinda latter day Max Headroom.
1. ye 2. yep, although I call it purple. 3. no, you're not rotating or bloated. 4. That one is easy to dismiss. 5. could just be moving left and right... 6. my brain makes no assumptions, only observations. could be a shadow or a coloration error, who knows. 7. love the grid one. 8. mirages are feckin evil
god dammit, I saw the dancer as counter clockwise, then when you drew the arrows my brain switched and now I cant switch back
The ghost ship at 8:57 is so realistic, I shit myself.
Shepard's tables only work because the legs are facing outward on the vertical, while they are facing in on the horizontal.
lol, I started watching this because I was waiting for a video to render.
HA! YES!! took me like 3 minutes but i managed to get the spinning dancer to switch, biwinning
Damn, for so long (at least any time it's been brought up) I've been trying to see the dancer spinning counter-clockwise instead, but I never could. Once it was stated here that those who concentrate on her bottom foot see it that way, I put my hand over the rest and imagined it going the other way and it worked! Anyone else who's struggled with that... though I doubt anyone would really call it a struggle lol, I suggest blocking out everything but the bottom foot until you can convince yourself it's going the other way, then the whole thing should fall into place.
good vid and very intresting. thanks hank
i think almost everyone can switch between the two if the yswitch from looking at her hand to her leg
Beautiful video recommendation
What I learned from this video?
It's fking hard not to blink.
You know what's stranger? The fact that the video started de syncing and went in reverse.
1:42 WOAH EVERYTHING HAS A PINK GLOW!!!
I looked at the green image for about 10 seconds, after the scene changed i saw a green outline, pretty interesting.
A lot of optical illusions used to give me headaches. Glad thats over.
I spent like 5 mins on the spinning dancer illusion switching it back and forth
Oh dayum, the first time she was spinning counter clockwise but the second she was spinning clockwise...xP
Wow, that was cool! 👍
You didn't swirl for me. I even played that part again all I got was watery eyes.
Name of the Ghost Ship illusion is Fata Morgana.
this soooo coool.!!!!
The Flying Dutchman isn't the most famous maritime mirage.
The Titanic hitting an iceberg is, although not all know this was the cause.
The sudden channel of extremely cold air/water trapped beneath warm air caused horizon refraction(mirage) hiding a large iceberg which would normally be seen from 30 minutes away against a very clear star lit night to only being seen 30 seconds before impact.
The same optical illusion(refraction) is believed to be the reason the California never went to aid the Titanic even though crew testimony from the California said the ship they saw wasn't the largest ship in the world, or they couldn't see the steam stacks of an ocean liner but a much smaller vessel, when infact it was the titanic.
As for the dancer, I never looked at the hand, always at the foot in the air. And I can swap her direction with a beat of mental concentration. So ignore the hand advice.
It's Hank!
the dancer switched for me
the dots on hanks shirt dont result from optical illusions but from the fact that at some point the horizontal and vertical threads of same color intersect. this results in the respective color being twice as intense.
i wonder why he wants to make us believe its an illusion?
does it run in the green family to try to lure ppl into a false reality? (see also lacy for further examples)
I have to close my eyes and imagine it the other way to switch the dancer
to switch the dancer rotation just stare at her foot and concentrate on it turning the way you want, you'll be surprised of the results
0:28 it's not an illusion that's how we see anyway we see, an image and then it gets updated every like 0.02 seconds (close enough for me, also I was talking about vision )
+SciShow
I believe that Your attribution to the "herman-grid illusion" as an explanation of the appearance of Your shirt in at least this video actually is wrong.
Now of course I can't tell what it looks like "in real life" nor how other people "perceive" it.
How ever when watch this video, Your shirt appears to have brighter spots at the "intersections" of the "lighter lines", i.e. this is the "opposite effect" to what the "Herman-Grid illusion" would cause, And they don't disappear if I look directly at them either.
And by taking a screenshot and measuring I could easily establish that this is not even an illusion, Your shirt (or at least the picture of it) has measurable lighter colours just where it appears to be brighter...So NO Herman-Grid illusion here...
I would simply attribute the "brighter spots" to how a checker pattern of this appearance is actually woven.
Any who, thanks for an interesting video
that is nuts
So, motion aftereffect is what happens after you've played Guitar Hero for a while?
I'm still wait for the 8 mind blowing illusions.
Motion After-effect. Explains what happens after I play a song on Guitar Hero.
The spinning dancer looked diffrent To me as a kid, I remeber seeing it thinking it was spinning one why then a teacher told me I was wrong and I couldn't see it spinning the same way before and since then I've only seen it spin the same way
When you connected the squares I saw a sort of gradient
More plesae!
Hey so this retinal fatigue thing from part 2 must explain why I get bubble patterns of green and magenta when I stare at a blank wall on the back end of an MDMA "trip". I always assumed I was hallucinating.
If you suffer from palinopsia you know how scary afterimages are xD
This has nothing to do with this video, but have you seen any videos from the Crushit channel? In a video of theirs that I watched recently they crushed a standard deck of cards and it exploded. I was just wondering why...
Dancer pissed me off, because i remember seeing it before and being able to switch, but now i couldnt at all
Then is the world just a flash of images taken by your eye very quickly too?
at the dancer girl illusion i saw her spinning left...last time i seen it she was spinning roght....does this mean that your perceptions qre influented by some external factors ?
I like number 5 I could switch what I see
the checkered square looks more like a color gradient to me :/
and I used to be able to switch on the spinning dancer but it seems I can't anymore :/ why's that?
I looked at the wall after this vid and saw
Hank Magenta.
Hank's evil twin!
shame. it took me several minutes to get it :/
I was hoping the election results was going to be on this list...
lol
DarxLite Aren't you a Savage
Questionable Cat Questionable cat
+DarxLite - Epic comment, my friend.
wewew salty libtard tears are my fav drink
3:34 The waterfall illusion, AKA, the Guitar Hero illusion, because your TV starts to rise after you pause a game of Guitar Hero.
LimeGreenTeknii damn right \m/
When mowing the grass, after stopping, it seems like the the world is getting "zoomed out" whereby the tractor and environment seems to be getting stretched and elongated. The closest thing that I can call this is the "vertigo effect" or "Dolly Zoom." As a kid, I always wondered why this happens when in the passenger seat of a car when coming to a stop, where it suddenly looks like the car is going backwards even when completely stopped.
Yeah. I've had this happen when using music visualization software. The first couple of times I used it, I was freaked out thinking "What's wrong with my monitor? Why is everything moving up?" Then, I realized that it was just my eyes playing tricks on me.
+Power Max -- Check out Alice in Wonderland Syndrome. It may be the vibrations of the mower that trigger this for you.
+thanrose -- No, I don't think it's anything like that, That problem appears to require a migraine, knock on wood, I don't think I have ever had a migraine. It's not randomly distorted perception, it is a motion exactly opposite of of the motion while mowing. Same effect as the spinning wheel illusion.
Didn't blow my mind... my brain is still intact... I call click-bait...
+ExMachina inap
Did it at least give your mind a hand job?
SciShow has people to pay! Lighten up ;)
ExMachina inap
The title is 8 optical illusions. If you didn't learn anything from this you're heading towards brain death.
🤣🤣
Are there AI vision system that get fooled by optical illusions?
What a great question. I'm gonna guess no, because their 'eyes' don't have cones and rods, but I'm not a scientist. So far, the comments look so stupid...I hope your question isn't lost. Why don't you give yourself a thumb's up on your question and little by little, maybe we can push it upward and someone who can answer, will answer.
SlyPearTree I highly doubt it. As explained in the video illusions are caused by taking advantage of shortcuts in the way our brains perceive the world, along with fatigue as previously mentioned. But with either case it's caused by the brain comparing pieces of visual information and applying existing knowledge about how the world works. Whereas to an artificial eye and brain it's purely quantitative information - pixels and numbers. And it can't suffer from fatigue that would affect it's perception. All information is pure and direct, any comparisons made to existing knowledge is taken at face value, nothing altered to try and make sense of it. Because a computer primarily "thinks" in exact measurements, whereas we think in approximations and generalizations.
I imagine that making them operate with similarly "simple" short cuts as us would effectively improve their day to day ability to process visual information. These illusions are the rarity and acceptable errors when compared to just how quickly and accurately vision can be with animal brains, ours included. Trying to make things perfect would require insane computational power and slow things down to a crawl.
I do not believe there is an advanced enough AI vision system that exists to detect optical illusions much less know what is going on in a video or picture Object detection through pictures is one of the most complex problems in the computer science fields, and as far as I am aware the best method for AI to learn what is in a picture is through large amounts of test data in a neural network meaning it probably won't know what its seeing is an illusion much less an object it is familiar with.
Yes, no and it depends on the case and how you'd define the term "optical illusion". Not in a sense like the optical illusions that the human eye perceive(like the ones in the video) but since camera sensors and especially AI(AI is nothing more than a bunch of algorithms, there is no true AI) have their flaws so you can fool them, technically that would be sort of an optical illusion(just one not intended for humans). Take facial recognition for example, it can be very easily fooled by painting specific pasterns on your face, from the sensor/software perspective that would be an optical illusion.
I love pooping and watching scishow
literally!
Dude your ninja squirtles are epic I love it :D
Hopefully you're sitting on the toilet and not in a chair.
Perfect length vids. Even time for that “just to be sure” push.
😂😂😂
Hank looked at his wardrobe and said "Ah, there's the perfect shirt for today's episode."
I switch between clockwise and counter clockwise with the dancer
haha nice profile pic, only few will get it
Yep, the dancer was cool. First I wondered how one could see her on her right foot and then the arrows came and she started to move in the other direction. :)
If you strip down the jif to single images, she changes rotation for a short bit and then back.
Abdul Malak yknow like peanut butter
Same here. To help switch between clockwise and anti-clockwise, watch her then her shadow.
Pause at 3:54-55 during the shepards table, and I have a problem with the illusion. You can clearly see that the perceived difference comes from the fact that the slender one if being shown from a specific angle to highlight one of its edges that seem to add to its length. The same thing is being done for the short one, but its angle is shown to highlight the edge on its side, adding to its width.
I have a problem with this illusion too, or maybe it's more with his explanation of it. When he says the table on the left "is much longer than it looks" doesn't he really mean "it looks much longer than it is" ? I think if photos taken from different sides of a real squarish table had been used instead of drawings this trip-up would have been less likely, but also the effect less surprising. Does that coincide with what you're basically saying?
Did you just assume my vision?!
Yocool13's Channel *triggered* I'm triggered!!!!!
no, I'm even MORE triggered, cuz I wear glasses, so I'm vision impaired! it's a minority group! respect my oppression! lmao
*internally oppressed
The nearsighted make up around 40% of Americans, so we're not going to be the minority for much longer. :( We already make up the majority in some regions on earth.
Patrick McCurry evolution doesn't seem to be in yalls favor it seems
I can see the spinning dancer spinning either way if I want to. If I'm not trying, I see her spin clockwise, but I can make her spin counter clockwise (most often by looking at her feet for a moment).
One of us! One of us!
MadeofAwesome4ever So unique. Really, just wow!
Péter Kardos 😇
MadeofAwesome4ever Same here
For me, i just have to close my eyes, and imagine her spinning the other way, and it usually works.
I usually have no problem turning the spinning dancer around but right now I just can't and it bothers me quite a bit.
Todesnuss You've become dumber. sorry
Todesnuss having the same issue haha
Same! Maybe it doesn't work in video format, or they sped up the animation so it's harder to change perspective. Either way... That one was bothering me too.
I looked up a gif of it online and couldn't figure it out either. Very odd.
Albert Einstein Thanks for the advice. I shall go visit a hair doctor first thing in the morning.
I saw the spinning lady change colour.
Just an optical illusion right? Ha.. Ha.. *sweating profusely*
wrg, no sweax, anxiex etc for suchx, anyx
Hank Magenta, also known as Hank Green xDxdxD
Hank Aftergreen.
Maximiliano Britez badum tss
The spiral didn't work for me... even if I tried extending the video of the spiral by going back.
same effect as when you get off the car after a long ride. the world seems to be moving away from you for a little while
I think it's because their spiral is so wonky. They didn't bother to make smooth. They were too busy coming up with click bait titles.
Huh, I used to be able to flip the spinning dancer at will. Like, it high school when this GIF went around I remember bragging that I could flip it and explaining to friends on one side how the other side perceives it...thing is, I can't anymore. Weird.
Atticus Lee same
Atticus Lee Being able to "flip the spinning dancer at will" sounds like mind controlled hard-ons.
Certain optical illusions are harder for the aging eye. I used to be able to perceive and analyze many illusions, but as an old lady it's more challenging, sometimes impossible.
look at where the legs cross for a long time
I can flip her but it takes some focus. Like I can't just swap my perception instantly, I have to stare her and think about how I could perceive her going the other way then suddenly she switches.
4:25 Adolf Fick? thats quite the interesting name if you're german.
well back then they didnt have tech like today so they had to do the next best thing.
( ͡° ͜ʖ ͡° )
The name Adolf has really died out for some reason.
Max Brockie no idea why that happened it was probably just a culture shift
Oh i actually changed the way the dancer was moving. At first i thought it was the video but then i went back and saw she was moving counterclockwise but then i looked at my table for a split second and she started rotating clockwise...
I saw her spinning counterclockwise at first but then it switched and now I can't change it back.
After a while it just started switching directions randomly.
Damn it! I used to be able to perceive dancer spinning in both directions. But now I can't anymore :(
Wow! So that's why after skiing all day with orange goggles everything looks weird that evening
Can you do one on cerebral aneurysms? I had one rupture at 19 and would love to learn more!
already 20 likes on a 10 minute video only uploaded 60 secs ago...
It's really impressive.
And there are already 4 "around my anus" comments, too.
da Sharpman
Those are the best.
***** good point...
+Pro Haggis
Are there really? Or is it an illusion?
BUT WAS THE DRESS WHITE AND GOLD OR BLACK AND BLUE?
BLACK AND BLUE
Steve Cheetah White and Blue
Steve Cheetah A. All of the above
Am i the only one who were able switch from seeing gold and white to black and blue?
5. I'm able to switch between the two, but I have to pause the video and concentrate very hard on what I'm expecting to see.