Great optical illusion

[Neil]

http://img150.imageshack.us/img150/2960/optical20illusionbf5.jpg

[Kaos]

I didn't believe it until I put my fingers around the A and the B so that all I could see was the letter and the gray immediately around it. Sure enough it is the same shade. It is neat how our brains process the A as darker than be due to the relative difference in shading in the surrounding blocks.

[Skippy911sc]

I saw this some time ago and copied the picture so I could use photoshop to sample both sections and see that there was NO difference...pretty cool!!

[MinionZombie]

Wait ... ... I don't get it. :eek::shifty::dead::confused:

[bassman]

Wait ... ... I don't get it. :eek::shifty::dead::confused:

I'm glad that I'm not the only one....

[AcesandEights]

I have tried covering up both images and don't see the difference either...

Bassman, MZ...I think we're being had!!! :shifty:

[EvilNed]

I put it into photoshop and deleted all squares but those two. and indeed, they are the same!

[MinionZombie]

Yeah, B is blatantly a different colour square to A, all I see is that the font colour of each letter corresponds to the box of the other box ... if that makes sense.

At least there's three of us, I was worried someone might have called me a numpty. :p

We demand proof!

[capncnut]

Yup, they are the same colour. Like Kaos and Ned suggested, you have to remove everything around the two squares in question to see it.

[Neil]

Yeah, B is blatantly a different colour square to A, all I see is that the font colour of each letter corresponds to the box of the other box ... if that makes sense.

At least there's three of us, I was worried someone might have called me a numpty. :p

We demand proof!

LOL! They ARE the same colour :)

Put them in Photo shop and use the pick up ink tool, you'll see they are the same RGB (colour).

[AcesandEights]

I'm about to start burning people at the stake. I can't validate these specious claims right now with my work comp...

[MinionZombie]

Ugh, after going to all the trouble of blocking off all outside sources beyond A and B, yeah, they're the same ... well, A might look a SMIDGE darker, but it was a palava to block the other blocks out without any proper software beyond MS Paint (not on my rig which has other software).

[AcesandEights]

They got to MZ, as well...:shifty:

[Neil]

Ugh, after going to all the trouble of blocking off all outside sources beyond A and B, yeah, they're the same ... well, A might look a SMIDGE darker, but it was a palava to block the other blocks out without any proper software beyond MS Paint (not on my rig which has other software).

Not a smidge, or any if about it... They are absolutely 100% the same colour :)

[capncnut]

Here's (http://web.mit.edu/persci/people/adelson/checkershadow_proof.html) the proof.

[Neil]

Here's (http://web.mit.edu/persci/people/adelson/checkershadow_proof.html) the proof.

From that same site... Here's another similar one... What a mind f***! http://web.mit.edu/persci/gaz/gaz-teaching/flash/koffka-movie.swf

[clanglee]

Well that's pretty crazy. I had to cut two holes in a peice of paper and hold it up to the screen to believe it. . but yeah. . . it's crazy.

[MinionZombie]

Oh okay no smidge about it, lol ... at least that other thing, that SWF, that shows you it - but that one is PROPER crazy with the semi-circles floating around ... eyes are crazy things sometimes, eh?

...

*waits for Aces and Bassman to come after him with one of those Alien Bounty Hunter ice pick devices* ... yeah, I've been watching a LOT of X-Files recently.

[Neil]

Well that's pretty crazy. I had to cut two holes in a peice of paper and hold it up to the screen to believe it. . but yeah. . . it's crazy.

LOL!!! Classic!

It is one of the best I've seen :)

[axlish]

RE: The Koffka Ring...

When the ring is split, the colors appear identical to me, but they are saying that I should be seeing them as different colors.

When the shift happens, I do see different colors.

[AcesandEights]

Aw jeez, what a load of work to confirm how undependable my eyes are :(

[Neil]

RE: The Koffka Ring...

When the ring is split, the colors appear identical to me, but they are saying that I should be seeing them as different colors.

When the shift happens, I do see different colors.

Aha! So you are a psycho mentalist killer then!!

[MinionZombie]

Aha! So you are a psycho mentalist killer then!!
I'm glad I saw the difference in rings now! :eek: