Somebody explain this, please!

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This is a completely static .jpg image. But it moves. Can anyone give me a logical, science-based explanation???

purple_optical_illusions.jpg
 
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If I answered your question, I'd be suspended from the forum.
 
It's a physiological optical illusion.

From the wonderful world of Wikipedia:

Physiological illusions, such as the afterimages following bright lights, or adapting stimuli of excessively longer alternating patterns (contingent perceptual aftereffect), are presumed to be the effects on the eyes or brain of excessive stimulation of a specific type - brightness, tilt, color, movement, etc. The theory is that stimuli have individual dedicated neural paths in the early stages of visual processing, and that repetitive stimulation of only one or a few channels causes a physiological imbalance that alters perception.

Like this image... it looks like there are dots in the intersections... but there isnt
 

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Can't be any clearer!

Haha. A combination of colors and and angles causes the eyes to tell the brain there is movement, or there are colors where there aren't any.
 
Thanks PALADIN85020, I just set that picture as the background on my computer screen. It duplicated itself a couple times and NOW IT'S BREATHING! :)
 
My desktop background is one of those 3d sterogram images.

I have a bunch of "Magic Eye" books that I got when I was in elementary school. I used to be obsessed with these things!:D

The colors aren't as nice now that I saved it as a jpg, but the illusion still works. Dont cross your eyes for this one.... look past it. If you cross your eyes you'll see the image the wrong way... moving away from you.. if you do it the right way ("looking past" the image) it will pop out toward you.

Oh, and when you become a pro like me, you can even do it with the thumbnail. :)
 

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In normal sight, your eyes are constantly shifting focus as they (you) scan through your field of vision. A optical illusion of this type uses angles and colors to cause your eyes to change focus, making the image appear to move.
 
Wearing tin foil under your cap will prevent these obvious attemts at mind control! The voice's in my head said so.
 
My desktop background is one of those 3d sterogram images.

I have a bunch of "Magic Eye" books that I got when I was in elementary school. I used to be obsessed with these things!:D

The colors aren't as nice now that I saved it as a jpg, but the illusion still works. Dont cross your eyes for this one.... look past it. If you cross your eyes you'll see the image the wrong way... moving away from you.. if you do it the right way ("looking past" the image) it will pop out toward you.

Oh, and when you become a pro like me, you can even do it with the thumbnail. :)

Took a minute, but then a shark appeared.
 
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