Slashdot Mirror
The Goggles, They Do Nothing
Suchetha writes "In anticipation of a slow news day i would like to direct the Slashdot hordes to Akiyoshi Kitaoka's Optical Illusions page. The page also has explanations on why/how they occur (in icky PDF format). The page is on a .jp uni server so they SHOULD be able to handle the herd of rhinos that is ./."
Use the cache so more people can see! Thanks!
Caution: This page contains some works of "anomalous motion illusion", which might make sensitive observers dizzy or sick. Should you feel dizzy, you had better leave this page immediately.
Some of the pictures on this website can cause dizziness or might possibly epileptic seizures. The latter happens when the brain can't handle the conflicting information from your two eyes. If you start feeling unwell when using this website, immediately cover one eye with your hand and then leave the page. Do not close your eyes because that can make the attack worse.
Here here
Some of these images have been copied elsewhere. Google Image Search shows some of the pictures, such as rotsnake2.gif
Bill Stewart
New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
Archive.org to the rescue!
http://web.archive.org/web/20031203215948/www.psy. ritsumei.ac.jp/~akitaoka/download.html/
This will probably get slashdotted really quick because the archive.org servers are already slow. Someone make a mirror of this page quick so everyone can have a piece!
Just use this. Just saw it on Wired. They mirror every website Slashdot news includes.
lol. But sriously, the JPEG artifacts cause the values to be *slightly* off on some pixels. But I encourage you to cut out the A square and drag it next to the B square. When they're next to each other, they look exactly the same.
What's interesting is that I blocked out the rest of the picture by covering it with other windows, leaving just parts of those two squares visible...and they STILL look like different shades.
Its actually a pretty simple illusion thats both a problem to artists as well as a useful tool.
Basically, colors always effect other colors. For example, if a gray square is surrounded by black squares, the gray square will seem much brighter than it would sitting next to other tones of gray.
If you surround the gray square with white squares, the gray square will seem much darker.
I guess you could call it the color theory of relativity.
This works with colors, not just with shades of gray. Surround a medium gray square by orange squares, and the gray square will take on a cool blueish hue (blue is complementary/opposite of orange), even if its rgb is 128,128,128.
In this optical illusion, the shadow cast from the cylinder onto the 'A' squares is affecting the appearance of the 'B' square. Its only the shadow thats causing the illusion.
Here is the original link, along with an explanation of why this illusion works.
Link