Optical Illusion

[royaldank]

My buddy sent me this today. Sorry if it's a repost.

If you haven't seen the optical illusion with the tile floor and shadow you might like this. I think it's cool.

http://www2.freepichosting.com/Images/40178/0.jpg

 

[rudeguy]

nice, I like it

 

[JetBlack69]

<Neo>Woah!</Neo>

 

[Anubis]

its been posted once or twice but i dont care its freekin cool anyway

 

[bootymac]

I like this one better

 

[Anubis]

Originally posted by: bootymac
I like this one better

heheheheheh thats good

 

[dethman]

posted before, but deserving a repost for those who haven't seen it.

but the second one is DEFINITELY better. i really didn't see that boat for a while.

 

[prodigy]

Originally posted by: bootymac
I like this one better

I've been staring at that picture for 10 minutes and I still don't see any boat.

 

[Eli]

Originally posted by: bootymac
I like this one better

LMAO......

 

[z0mb13]

heh how is it square A and B the same shade??? isnt it different??

 

[dighn]

not different, you can use a grahics program to varify

 

[conjur]

The letters A and B are the same...is that what they mean?

maybe it's just this laptop screen. If I tilt the screen way back I can see the background of those squares is the same color.

 

[TallBill]

its definitly the same...

i like that 2nd pic

 

[Eli]

Originally posted by: z0mb13
heh how is it square A and B the same shade??? isnt it different??

That's the optical illusion. They are the same.

 

[nakedfrog]

Sure looks different to me.

 

[Kilrsat]

Originally posted by: z0mb13
heh how is it square A and B the same shade??? isnt it different??

Photoshop tells me they are both 107,107,107 so I kind of have to say that they are equal.

 

[Eli]

Originally posted by: nakedfrog
Sure looks different to me.

That's the optical illusion.

Christ, people.

 

[HomeBrewerDude]

There are two visual-perception effects that cause you to perceive the two squares to be different shades.

Lateral inhibition, an artifact of the eyes retinal nerve design which aids in edge detection, causes the tone delta to be amplified, making the dark square appear darker.

Contrast effects are the result of you visual cortex trying to maintain color constancy. Basically, its as if, the brain uses the fact that there is a shadow to infer that the actual tone of the light square is lighter than it appears (i.e., the brain adjusts the perceived tone based on the overall lighting effects.)

 

[Eli]

Originally posted by: yamahaXS
There are two visual-perception effects that cause you to perceive the two squares to be different shades.

Lateral inhibition, an artifact of the eyes retinal nerve design which aids in edge detection, causes the tone delta to be amplified, making the dark square appear darker.

Contrast effects are the result of you visual cortex trying to maintain color constancy. Basically, its as if, the brain uses the fact that there is a shadow to infer that the actual tone of the light square is lighter than it appears (i.e., the brain adjusts the perceived tone based on the overall lighting effects.)

So does that mean it would be possible to train yourself to see them as both the same shade? At least, in the latter case?

 

[zsouthboy]

Try looking at it with the cylinder covered up, see if that helps.
Else, photoshop

 

[slackerinabox]

Try squinting - it helped for me..

 

[HomeBrewerDude]

Originally posted by: Eli

Originally posted by: yamahaXS
There are two visual-perception effects that cause you to perceive the two squares to be different shades.

Lateral inhibition, an artifact of the eyes retinal nerve design which aids in edge detection, causes the tone delta to be amplified, making the dark square appear darker.

Contrast effects are the result of you visual cortex trying to maintain color constancy. Basically, its as if, the brain uses the fact that there is a shadow to infer that the actual tone of the light square is lighter than it appears (i.e., the brain adjusts the perceived tone based on the overall lighting effects.)

So does that mean it would be possible to train yourself to see them as both the same shade? At least, in the latter case?

Perhaps, by repeated exposure to a virtual environment where tone is not effected by cast shadows. Studies have been done where subjects where glasses that invert the visual field (ceiling b/c the floor, vice versa) and after a relative short period (i think its about 6 hours) the wearer no longer PERCEIVES that the visual field is inverted. The same principle might work for color constancy.

Nothing can be done to reduce the effects of lateral inhibition as it is hardwired into the retinal nerves.

 

[dighn]

Originally posted by: yamahaXS

Perhaps, by repeated exposure to a virtual environment where tone is not effected by cast shadows. Studies have been done where subjects where glasses that invert the visual field (ceiling b/c the floor, vice versa) and after a relative short period (i think its about 6 hours) the wearer no longer PERCEIVES that the visual field is inverted. .

so if you remove the glasses everything will be inverted again?! :Q

 

[Chumpman]

Originally posted by: dighn

Originally posted by: yamahaXS

Perhaps, by repeated exposure to a virtual environment where tone is not effected by cast shadows. Studies have been done where subjects where glasses that invert the visual field (ceiling b/c the floor, vice versa) and after a relative short period (i think its about 6 hours) the wearer no longer PERCEIVES that the visual field is inverted. .

so if you remove the glasses everything will be inverted again?! :Q

Yep, for another 6-12 hours.

 

[Marshallj]

Originally posted by: Eli

That's the optical illusion.

Christ, people.[/quote]

LOL