Amazing optical illusions
Ivan | Fri, 2005-06-03 10:07Focus on the plus sing in the center. Keep focused and tell me what you see!
I've touched up on optical illusions before and I'd like to know if you ever seen any of such similar techniques used in graphic design outside of games.
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To my eyes pink dots seem to disappear...
I have a headache now :P
Its weird how after time the effect starts doing different things
A rotating green dot... The pink ones have disappeared..
Cool stuff :)
Waleed
www.waleedsgallery.biz
i see a headache.
This isn't an optical illusions this is just one big fraud. Check the image... it's a animated gif file. This way you can make an optical illusions which shows a complete star wars movie :-).
Timon
Oops, I judged to fast. I tough the optical illusion was all about the disappearing dot. But I overlooked the fact that the dot becomes green when you stare to the '+'
Timon
I copied the GIF file to my desktop and opened it in the Preview.app that comes with my OS X. The file contains just a series of frames. Each frame has one dot missing, where the following frame has the following dot missing, and so on. When the browser's GIF viewer sequences the frames in reselected timed intervals, and is configured in an endless loop, you will have an animated effect. The sequence timing between frames is somewhat important for this particular illusion to succeed for the broadest number of individuals.
There's actually an absence of a dot rotating around in this animated sequence as you noted. After a length of time of fixation on a color, if that color suddenly vanishes, our brain will try to fill in that information with an acknowledgment of the absence by supplementing it with a negative approximation. We do this all the time in nature as we really only see a small portion of what's really in front of us. Our brains try to fill in the blanks.
Peripheral vision is most susceptible to this effect. The next phase of this effect is that after some time and steady fixation on the center, there's a secondary effect between the actual dots and that of the green supplemental dots. With time, these two opposite colors will be summed up by the brain causing a cancellation effect as your attention is affixed on the center, and on the peripheral green dot illusion. The brain will cancel out the purple dots as a result so you will only see the green dot rotating in your peripheral view on the white background.
Anytime you lose your fixation on the center, the purple dots will reappear.
Sorry, wrong movie...
Really neat, Ivan!
pierre-etienne courtejoie
My brain tries to ignore the afterimage, even though it's not really afterimage.
Curse my weak brain I don't want to see a a rotating green dot. I want to see a circle of purple dots with one rotating, but no matter how hard I try I cannot control it.
command me master Ivan ...
LOL! :D
Sure, the dot "looks" green as it disappears, but there's more.
At least to my eyes, I see random single or groups of dots that completely disappear! Very weird. Once I look directly at them, they show up.
And I'll I've had is orange juice this morning, I swear.
Indeed, the green dot is animated. But you have not stared at the cross long enough, or you did so from too far away:: the pink dots disappearing effect IS an optical illusion
pierre-etienne courtejoie
A rather fascinating website called '55 Optical Illusions & Visual Phenomena' can be found here: http://www.michaelbach.de/ot/index.html
Cheers, Colin.
You are getting sleepy....
When you focus on the plus sign in the middle, you think there's a green dot rotating around it. But in fact, there is no green dot at all. It's only the pink dot that disapear. If you focus on a pink dot, you'll see that it's grey when the dot is not there, not green.
I can't explain the green dot that doesn't exist, but as for the pink dots: what apparently happens, is your peripheral vision ignores things that aren't moving after a short time. This is why peripheral vision is so acute for what matters (seeing something coming in the corner of your eye.) Apparently, because we "tune out" what's already there, it helps us spot things on the approach (I.E., predators, in nature.)
I see a big pair of tits right in the middle. I see nothing else.
Becomes green then disappears... cool stuff.
New. Know.
now I have some holes in my screen...
I was looking for this illusion and finally googled upon it here at creativebits. I attended a recent NAPP seminar (Photoshop for photographers) given by Ben Willmore who does a column in the photoshopuser magazine. Ben used this illusion to show how the eye can see only red, green, and blue ... it's the brain that puts the colors together to form the millions of shades in betweeen. So ... staring at the purple dot yields purple (the brain is working) but staring at cross allows you to see only one primary color contained in that purple dot ... the green color. I don't remember (or understand) why you wouldn't see just blue or just red ... but I do remember the illusion had to have a gray background to neutralize(?) the eyes.
Eye Illusions are awesome
In rotation, a purple dot is removed one at a time and replaced when the next purple dot is removed. By staring at the cross in the center, the suddenly absent purple dot is replaced by an illusion of a green dot. If affixed to the center long enough, all purple dots may appear to vanish completely and all you will see is a single green dot rotating around the image. It works for me. I do have some trouble maintaining a fixation on the center, so the purple ring of dots appear and disappear as my concentration wavers. What makes this illusion particularly amazing is that the green dot is merely an illusion and doesn't really exist. It's created by the brain trying to fill in missing information. A similar effect can be created by staring in a straight direction while quickly whipping your hand across your field of view. Some people are able to see a trail following the hand. This is why many comic artist use streak lines to illustrate the appearance of quick motion. Such comic effects are perceived by the reader as motion which doesn't otherwise have to be explained by the artist. If the art is well done, the brain will perceive the motions and try to reanimate it in your mind. ---Will
how stupid!
how stupid!