Optical Illusion

[nicolaievich]

Take a look at this. I couldn't believe it until I check it out using an image editor.

Click the hyperlink https://upload.wikimedia.org/wikipedia/commons/9/91/Optical.greysquares.arp.jpg to view the image.

The A and B squares have the same colour 

[lagin]

I don't get it.  How can they be the same color??

[contrapunctus]

yeah block off each square so that you only see a small portion of each square and they are the same.

[Siberian Husky]

use two fingers and cover the letters A and B...and focus in the middle of the two squares..they are indeed the same color..and i indeed wasted 30 seconds of my life

[Dazzer]

just note that the squares around B are also in the shadow, and hence , darker.

[prometheus]

We don't see absolute colours and darkness/lightness. We see relative ones. Something is dark when it is compared with light.

So square B is light, because there are dark squares around it. Square A is light because there are dark squares around it.


The fact that they are both the same colours doesn't matter. Our eyes, or rather brains, are blind to that. We don't measure, we compare.

[nicolaievich]

That's right, but the important fact is that our brain can be deceived very easily

[lagin]

Oh boy! Oh boy!  I got it.  I see it now too.  I'm excited.  But unlike Husky, I have wasted at least 2 minutes of my life, lol.

[tompilk]

That's amazing... we need more of the optical illusion things... the same puzzles keep coming up... but this one is original (i think)... 

[quantum]

I like stuff like this. 

[I Love Xenakis]

I like stuff like this. 

Hooray.

[mycrabface]

yeah block off each square so that you only see a small portion of each square and they are the same.

WOT?

[mycrabface]

WHAT? I'm not wearing glasses.. Can't see a thing.. Anyway I don't understand as I am extremely stuuuupiddd... someone exxxplainnn pllloperly pleeeessseee.. seriously.. im stupid..

[pianorama]

I have actually seen that before in an optical illusion book.... It freaked me out when I covered all the other squares. Freaky....

[mycrabface]

Cover which squares with what fingers and look at where??

[jas]

Cover all the squares but A and B. And cover up the letters themselves, too.
Or if you're really pedantic you could do what I did and copy it onto a paint programme and delete everything else! They are the same colour. It's so strange.

Jas

[ted]

A few months ago, my algorithm to produce abstract art came up with the following picture:

https://photobucket.com/albums/c66/Oso1138/?action=view&current=chromostereopsis.jpg

To me, the red oval appears sunken into the screen. Several people, however, did not see the illusion at all, but only a flat picture of what could be a sunken oval. I wrote to a Japanese expert who has a site of optical illusions and he replied saying it was an example of chromostereopsis. Some people see it but most do not. Some even see red in front of other colours. I see it myself in the chatroom when people use different colours for their text, but when I asked others present, I was in a minority.

[nicolaievich]

A few months ago, my algorithm to produce abstract art came up with the following picture:

https://photobucket.com/albums/c66/Oso1138/?action=view&current=chromostereopsis.jpg

To me, the red oval appears sunken into the screen. Several people, however, did not see the illusion at all, but only a flat picture of what could be a sunken oval. I wrote to a Japanese expert who has a site of optical illusions and he replied saying it was an example of chromostereopsis. Some people see it but most do not. Some even see red in front of other colours. I see it myself in the chatroom when people use different colours for their text, but when I asked others present, I was in a minority.

I think I can see what you see