The Checker-shadow illusion, by Edward H. Adelson

[omg432111]

不可思議！！！

[ChanchieOK]

いつ見ても不思議！

[watdoejebigtime]

mindFUCKKKKKK

[azguy35]

Wow, funny, Adelson's point was about design and contrast but the presenter put in tiny text with no contrast. Presenter you are an idiot.

[Sood81]

If you are on your laptop, push the screen to the back and you can see it's the same.

[WarDwarfSalad]

This is just a glitch in the matrix

[eetherealflux]

fuck it!! fuck you brain i cant trust you!!

[nellie2581]

Great

[RyLMzSp]

good job!

at first I think you edited the "a color" and "b color", made them the same (but actually they are not) then put it together. But when I check the RGB with the full chessboard it's so amazing! And I know you didn't trick .

I think that if you added some more description, people would not misunderstanding you (and the illusion) like this

[piarez]

nice trick, stupid music

[ciaobellakate]

My brain doesn't want to believe!

[YankeeSpike]

am i actually colorblind then, more or less? i mean if i couldn't see that those were the same, just think how many mistakes of these kind you make in real life everyday. i am confused now.

[RyLMzSp]

@YankeeSpike illusions cheat everyone. But that's interesting, isn't it?

[robbiekillz]

only real way to do this is get this image go to paint and erase evrything do it yourself...fucken amzing....there is a god..YES!!! i knew it *tear*

[bcosby5252]

Yes, your brain can be easily tricked into not properly recognizing size, color, movement, etc... Get over it, you worthless dipshits. Put the picture in computer, use color picker to test both colors, and shut the fuck up.

[marocconit]

sry for spamming this page but it annoys me that ppl can be so fast to say that they own brain is confused when they havent checked the collors properly

[Englebarn78]

@marocconit Well, YOU obviously have not checked the colors. Do a print screen and paste into any image editor. The colors are 100% the same.

This is one of the most famous optical illusions out there and it surprises me that you feel the need to spam with comments implying that it's fake. Do some research before you spam.

[karstein81]

@marocconit Do a "printscreen" of the film and "paste" into paint. Do everything white but the two squares. Move the squares together and get blessed =D

[karstein81]

@marocconit Do a "printscreen" of the film and "paste" into paint. Do everything white but the two squares. Move the squares together and get blessed =D Just like in the movie.

[GunnarKG]

@marocconit

Dude. This is a very famous illusion, not some editing trick.

Google it. Click on "Save picture as" and then you have it in paint or whatever program. It´s the same color

[marocconit]

put a A4 paper on your screen and see the difrence of the collors this video is edited and doesnt work like it supose to, if it really was my brain getting confused it would be cool , but this is just a scam rly

[marocconit]

the really trick is that he makes u belive that u was tricket but really the collors are diffrent

[marocconit]

i checked it and in the start B is a little whiter than A, its both your selfe tricking you and this guy who made this video edited the colors a little to help

[tomken91]

roflhaxXOROR

[saadaq2005]

i dont get it

[fillosofert]

They are the same colour! I advice to stop the film at 0:23 and to put your fingers on the screen so that the fingers cover all the neigbouring squares . Then, without the visual polution, you will see its true.

[jodetert]

Holy shit! i jusrt tried it myself and after seeing the results my brain exploded :0

[Grijano]

WTF? Haaaaxx

[fabantasia]

i do it with paint and no way :O but i get it right now the shade project by the cilinder creates a more obscure shade so theres 3 color not 2 or something like that

[22615475]

i didnt believe it, after trying it out myself, I STILL DONT BELIEVE IT, A IS DARKER.

[YOUCANNOTDENY]

The illusion works mostly because the color of text "A" is lighter than the color of text "B."

[gamerX065]

awsome

[insurd]

Wow! That actually works! LOL

[dudeinthesea]

My brain just got fucked by my own brain

[joho97]

holy fuck it real!!!

[ati832]

bollocks

[ponchmasta007]

Bullshit.

[BrawlThuNdeR]

@ponchmasta007 It's real, prove it yourself :)

[TheCivilEngineer22]

the music is from an indian movie called mr india! lol cool!

[vide0c0w]

its TRUE! dl.dropbox.com/u/8314617/check­er-shadow.png

[yudilks]

I proved it using photoshop.. Both square has color of 107 107 107.. Amazing

[supercalaification]

I used Apple GRAB to check it out! FANTASTIC! eheheh same color! My brain is DUMB!

[amora20xx]

OMG



[glenakin]

How fucking idiotic is this shit??

[CapitalGamer]

WTF

[seannz100]

its works because of the shadow from the cylinder changes the shade of the squares under it witch includes the B square, and the darker squares make it appear lighter than the A square, if u understand wat im trying to say.

[thedeathskittle]

Paganini Caprice No. 24

[nexuspexus]

Totally amazing. A = #787878 B = #787878

[321beth321]

0.o ummmm.. at the first it was completely diff. from each other i swear!

[brendan0153]

LOL !! coooool !!

[Pr0oST0RM]

You Is SOn veri bitch!

[JustARandomGirl21]

O_o

[DTOWNZxBOI]

THIS IS BLASPHEMY!

[CapitalGamer]

@DTOWNZxBOI i like that lol

[Electrodeposit]

Its easy, close your eyes and focus and you will see its the same color

[LeMagicZont]

it's true color is 107 107 107

Try to prt Scr and then use photoshop to erase.

Outstanding Oo

[TheMagg1234]

love the song:)

[NadrojJor]

i didnt believe it either, so i coppied it into paint and cut it for myself and they were the same colour

[JamesBurkeWeb]

Of course. I mean, nobody should take my word for it. It is very easy to check for yourself... but apparently some people don't get this whole "science / experimentation" concept ;).

- JBW

[eshayahbay]

what the hell was that? you just changed it when they where put together

[bananastaut]

This is fake!!!Bullshit!!!

[BruceJacobAkaPete]

omg srsly dude this is real!!! I just did this and it's real!

[bananastaut]

@BruceJacobAkaPete GOD!!This is real fact!!!

[BruceJacobAkaPete]

hey um, this a real question, why do people put a little @ in front of someones name?

[rage4200]

@Bruce... you're a dumb twat.

[BruceJacobAkaPete]

okay dude you just made me feel really bad about myself . . . .

[JamesBurkeWeb]

LOL

[JamesBurkeWeb]

Oops, I meant...

@All: LOL

[shayorshayorshayor]

ok the illusion is absouletly real butt, the reason rage4200 is because obviusli the shadow....actualii the main reason is the color of the letter a is darker than b...if the shadow line actuali had a marker than you would clearly see that its the same anyway...but back to the point where the shading of the letters ...if you take them and both of the letters have same shading than it would be more clear as well.....i am joberish

[rage4200]

What's the reason why we interpret those squares as different colors?

[vaginaleg]

@rage4200 beacause the shadow reduces the amount of light that bounces of the B so everything looks darker and because everything there looks darker by it still has the same pattern it still apears top be lighter than A but when the pattern is taken away we see the colours properly

[shayorshayorshayor]

@rage4200 ok the illusion is absouletly real butt, the reason rage4200 is because obviusli the shadow....actualii the main reason is the color of the letter a is darker than b...if the shadow line actuali had a marker than you would clearly see that its the same anyway...but back to the point where the shading of the letters ...if you take them and both of the letters have same shading than it would be more clear as well.....i am joberish

[grumbel45]

Because they are different or at least would be in the real world. The brain isn't build to color pick on 2D image, its build to find its way around in the real world and for that its important that you are able to see the color of an object in the same way, even when the lighting is different. In this case, if you would remove the shadow casting block, the tiles would be different colors. Its only because the light tile is in shadow and the dark tile in light that they end up as the same value.

[hotsheat2002]

this seems like bullshit... no way

[JamesBurkeWeb]

To prove it to yourself, you can do it yourself. Hit printscreen, paste the image into your image editor and hover the "view color" cursor over each area and see that the RGB's are the same. Either that or chop away the bits as I've done.

If that doesn't convince you then you'll have to accept that you believe that your computer is lying to you.

- JBW

[RyLMzSp]

@JamesBurkeWeb good job!

at first I think you edited the "a color" and "b color", made them the same (but actually they are not) then put it together. But when I check the RGB with the full chessboard it's so amazing! And I know you didn't trick .

I think that if you added some more description, people would not misunderstanding you (and the illusion) like this

[RyLMzSp]

@JamesBurkeWeb Allow me to re-make this under Vietnamese to spread this amazing illusion. Am I allowed? Thank you very much

[TheBig1dea]

I can't trust my eyes...

[JamesBurkeWeb]

Nope. Nor should you.

Even if everyone else agrees with your observation, it may still be wrong.

- JBW

[vexelknight]

thanks!

[JamesBurkeWeb]

You're very welcome!

- JBW

[vexelknight]

i never understood that..

[silverfoxcondor46]

This illustrates just how much our perceptions differ from reality

[JamesBurkeWeb]

I would qualify that with *can*: "can differ from reality".

Visual misperceptions such as this one are automatic; built-in mechanisms that we have no way to go about changing.

Some forms of misperception are subject to change, but they have the same effect as the built in ones. Those that depend on learned structures can be unlearned or modified as our knowledge changes, although we can never test if any current structure is actually "true" (and I use that word highly qualified as well!)

[silverfoxcondor46]

Yes...thanx for the qualifier.

We should be aware of the limitations of our sense perceptions.

[JamesBurkeWeb]

And equally aware of the limitations of our currently-imposed structure on the universe.

Often people regard science, or scientific thinking as searching for something called "truth" or "the facts". This is not the case at all. The goal of science is to discover ('a' sorry) one or more structures that agree with observation. It is an evidence-based view of the universe.

Most scientists believe that there exists a single, very simple structure that fits everything. Pure conjecture

- JBW

[Fl0Vid]

Well-said, I have always thought the same way :)

[JamesBurkeWeb]

You might be interested in today's featured article which goes into great detail about just this sort of thing. I'll put a link to it in the video description...

[silverfoxcondor46]

Thank you

[JamesBurkeWeb]

This is one of the most well-known optical illusions, and involves no "motion inertia", or fullscreen or anything. You simply see the image wrong because your brain has already made up it's own mind about the areas A and B. The actual "facts" are irrelevant because they don't fit the structure your brain has imposed on this image.