Dots!

[Jenisi]

How many do you see?

http://i17.photobucket.com/albums/b64/pinkberries17/dots.jpg

[Nieninque]

It depends what part of the square you are looking at.

[TheSmooth1]

How do those things work?

[Celephais]

My favorite "eyes see what they want to" picture is the checkerboard shadow one...
http://web.mit.edu/persci/people/adelson/images/checkershadow/checkershadow_illusion4med.jpg
The squares marked A and B are the same shade of gray.

Or the moving but not moving ones (just look at any one spot... that spot won't move, the rest will)
http://www.niehs.nih.gov/kids/illusion/images/spinner3.gif
http://www.hodgeslab.org/images/illusionone.jpg

[Celephais]

How do those things work?

Your brain doesn't see like a monitor does, it estimates a lot of things, so things it has less data on it just takes a guess and fills in the blanks. It also "gets used" to certain values... there is a photo you can stare at that's just a color blob... then you quickly switch it to a grey photo and the photo is colored in perfectly... until you look away and back and it's grey again. I think that was posted at one point on these boards...

[Sean of the Thread]

I love my retinal scarring. I see spots as it is.. thanks for fucking me alllll up.

[Celephais]

http://www.johnsadowski.com/big_spanish_castle.php

That's the color illusion I was talking about... I take back the checkerboard being my favorite...

[Teladro]

http://www.johnsadowski.com/big_spanish_castle.php

That's the color illusion I was talking about... I take back the checkerboard being my favorite...

I thought I'd seen all of the best illusions available online.

It'd seem I missed the best illusion yet.

Thanks! :shocked:

[Bobmuhthol]

I tried making one of them but it failed miserably. :(

[Jenisi]

We did that in psych class, there's one with the flag too. In the proper lighting, you can get the image burned in your eyes for like 5 minutes. Haha.

[Jenisi]

Works best with green and red, if I recall properly. But I'm too lazy to find my book.

[Asha]

It depends what part of the square you are looking at.

There's a square?

[The Ponzzz]

I don't get the checker board one at all...

[Artha]

I don't get the checker board one at all...
Look at one dots and some other ones should start flashing black and white.

[The Ponzzz]

No no, this one, but I had to photoshop to make my eyes stop spazzing out.

http://img407.imageshack.us/img407/9151/untitled4pm3.jpg

[Bobmuhthol]

It's pretty nuts, I cropped out A, B, and the two squares in between and B seemed to get progressively darker as I erased everything else.

[TheEschaton]

There is no way A is the same as B?!?

-TheE-

[Bobmuhthol]

It wicked is.

[TheEschaton]

Wow. That's fucked up.

[Artha]

It's because B is surrounded by other dark squares, so your brain just assumes that it's darker too.

[Celephais]

http://i169.photobucket.com/albums/u222/GuinnessKMF/checkershadow_illusion4med-1.gif


It's because B is surrounded by other dark squares, so your brain just assumes that it's darker too.
Er, it's surrounded by darker squares, so by contrast your brain makes it lighter than it is. (I figure that's what you meant to say)

[TheEschaton]

Aren't you the dork who criticized me for speaking in hex?

-TheE-

[The Ponzzz]

I'm afraid we're all dorks here, can you please further descibe this dork...

[Bobmuhthol]

I'm not. Tell all the 14 year old girls you know.

[Ignot]

I can't believe that square is the same color. That's wild. This thread scares me.

[Asha]

I can't believe there's an ''internet''!

[Back]

I tried making one of them but it failed miserably. :(

Its easy actually. Pick an image.

In Photoshop.

image/mode/greyscale

save as...

Then open the color original...

image/adjustments/invert

put a black dot in the center

save as...

Then set up an HTML page with a rollover image using the inverted color image as the off state and the greyscale image as the rollover state.

[Bobmuhthol]

No, no, I did it.

It just didn't work.

Actually, fuck, I think I might know why. I'll check it out later. Thanks.

[Back]

No, no, I did it.

It just didn't work.

Actually, fuck, I think I might know why. I'll check it out later. Thanks.

The Ponzz' avatar as an example (http://www.zendada.com/illusion.html).

[Bobmuhthol]

It works way better if you use the action he made, I've discovered.