[HN Gopher] Illusion of the Year 2021
___________________________________________________________________
Illusion of the Year 2021
Author : depsypher
Score : 63 points
Date : 2022-01-01 16:37 UTC (6 hours ago)
(HTM) web link (illusionoftheyear.com)
(TXT) w3m dump (illusionoftheyear.com)
| 323 wrote:
| The winning one, the phantom queen, it's not what I would call an
| optical illusion.
|
| It's more of a magic trick, like when they cut a person in a box
| in two.
| notfed wrote:
| The crocs illusion is just plain wrong. It says "the correct
| answer is <pink>". They then contradict themselves by saying it's
| green-gray. It's green-gray.
|
| Am I crazy? Any else's thoughts?
| jawns wrote:
| You need to make a distinction between color of the shoe (under
| normal lighting conditions) and pixel values of the shoe in the
| photograph.
|
| The shoe is pink under normal lighting conditions, but the
| pixel values are green-gray in the photograph, where the
| lighting has been manipulated.
|
| So, if you were to use a color-dropper tool on the photograph,
| you would get green-gray values for those pixels.
|
| But some people are able to do color-correction in their minds
| and determine that the underlying color of the shoe (under
| normal lighting conditions) is pink. Indeed, the automatic
| color correction that occurs as they visually process the image
| is so strong that they find it hard to recognize that the
| actual pixel values are green-gray.
|
| Yet when the color of the socks is changed to white, but
| nothing else about the photograph is altered, the visual cue
| that prompts them to do color-correction in their minds
| disappears, and they perceive the shoe color in the photograph
| to be green-gray, just as others do.
| notfed wrote:
| I'm still not convinced. They said the answer is pink.
| But...it wasn't pink, even to their own admission. A pink
| shoe, when placed under pure-green lighting is no longer
| pink: at this point we're out of illusion territory and into
| lighting trick / semantics territory.
|
| If they'd have said the answer is green-gray, then fine, this
| would be an illusion for those people who incorrectly thought
| the shoes are pink, but their answer is still wrong.
| krsrhe wrote:
| The picture is gray, but the actual shoes are pink, but
| bathed in green light. Some people sometimes can mentally
| remove the green lighting.
| allenu wrote:
| I think you're right. The RGB values clearly show it's green-
| gray.
| zootboy wrote:
| I wasn't too impressed with this one, either. In my mind, this
| illusion is much more straightforward demo of a similar effect
| (color perception being relative to surrounding colors):
|
| https://www.illusionsindex.org/ir/checkershadow
| notfed wrote:
| Yeah, this one is a true illusion: they're actually the same
| color, unlike the shoe example.
| jccalhoun wrote:
| Some of these are pretty cool but I always feel like the ones
| that depend on the camera being in a fixed perspective aren't
| nearly as cool.
| matsemann wrote:
| Some of them actually work quite well in real life. Even when
| looking with two eyes (thus giving your brain information about
| depth) and from a non-perfect angle. I've had exhibitions with
| these in the physical world, and no one can avoid seeing the
| illusion, even after picking up the objects and seeing the
| secret. The brain is stupid!
|
| https://github.com/Matsemann/impossible-objects
| Animats wrote:
| Illusion of the year: "I won".
| 1-6 wrote:
| Another one: "Brandon"
| depsypher wrote:
| Since the site is struggling, here's the videos in top ten order:
|
| https://youtu.be/i4p_x0S5bmQ
|
| https://youtu.be/TXk-Oc35oN4
|
| https://youtu.be/bVbPmFpspXc
|
| https://youtu.be/q_JqmwwbtpA
|
| https://youtu.be/yC5kHTsmXqQ
|
| https://youtu.be/zWr63p3gsM0
|
| https://youtu.be/LFvOzXUMXwM
|
| https://youtu.be/jb29X2SrgDM
|
| https://youtu.be/CePZ6vwYOYQ
|
| https://youtu.be/a7LUNyMvGqU
| 1-6 wrote:
| I'd like to preface that once you see it, you can't unsee it.
| Enjoy the illusion while the answer is not revealed.
| matsemann wrote:
| > https://youtu.be/jb29X2SrgDM
|
| Expected Kokichi Sugihara to be represented as always, not
| disappointed. I will have to try and replicate this one as
| well.
| lisper wrote:
| I don't get the fourth one, the one with the different colored
| crocs. I put a color meter on the images and the mystery pair
| is definitely not the same color as the pink pair.
| krsrhe wrote:
| armchairhacker wrote:
| it's not the same in the photo, the lighting changes the
| actual color. If you put a red object under green light or
| vice versa, it will physically appear grey. But it doesn't
| really work as an illusion in a digital video.
| lisper wrote:
| Well, yeah, but that's hardly news. What makes this qualify
| as an illusion-of-the-year?
| amelius wrote:
| Not a fan of illusions that only work from 1 camera angle. But
| the others are great.
| gnabgib wrote:
| Domain doesn't seem to be super responsive -
| https://archive.fo/dam04
| 1-6 wrote:
| I really enjoyed slime hand. It really brings home the potential
| of various haptic devices which will enhance our experiences in
| VR/metaverse.
| TrianguloY wrote:
| In "the double ring illusion" I'm unable to see them as 180deg
| rotations. I see all rings in the video doing constant 360deg
| rotations, and I don't care if they intersect.
|
| Maybe I'm too used to see virtual 3D animations where objects can
| intersect and do whatever they want without any physics involved.
| jccalhoun wrote:
| I'm the opposite. I see the rings spinning back and forth in
| all the examples.
| icsllaf wrote:
| Majority of the illusions seem to be 2D object projected as 3D
| object, they still get me every-time though. Definitely would
| recommend a game called Superliminal if this kind of stuff gets
| you.
| robwwilliams wrote:
| Yes, a bit slow to load but worth it. Ten videos of visual system
| illusion that work well.
|
| The last illusion "Phantom Wiggle" is probably caused by time
| base differences of rods and cone photoreceptor systems.
|
| The wiggle and movement of the strobed light is caused by
| ineffective calibrated of the bright and fast neural signals
| relative to the darker and slow (mesopic) signals of the large
| surrounding field of vision.
|
| Timing differences between retinal subsystems (rods and cones
| mainly) are misinterpreted as movement.
|
| Easy to see (expose) this temporal-spatial error effect between
| the slow rod photoreceptor system and the fast cone system.
|
| Here is how: Just after dusk look at a bright light or even a
| star low on the horizon that ALSO happens to be near the trunk of
| a dark tree. Close one eye and then look at the bright light
| while gently rocking the corner of your open eye back and forth
| with your finger. The light and tree trunk will move relative to
| each other. In fact, the light may appear in the tree trunk. Time
| and space are also relative in the brain.
|
| The brain has no clock or oscillator and has to create its own
| unifying timing system. The near-synchronization among brain
| subsystems is a key role of the thalmo-cortico-thalamuc feedback
| loop (imho).
| hiptobecubic wrote:
| I remember discovering this phantom wiggle when looking at LED
| clocks as a kid. Look at an old clock (or microwave) and
| vibrate either it or you (hum) at various speeds.
| kevin_thibedeau wrote:
| You can induce the phantom wiggle by looking at a matrix
| scanned 7-segment display and making motorboat sounds that
| vibrate your head.
___________________________________________________________________
(page generated 2022-01-01 23:01 UTC)