What Happens When You Drink & Drive


This clever public service sign about drinking and driving was found in Mumbai. This is only a detail; see the full picture at Ads of the World. Link -via Dump Trumpet

Looks like the advertisers missed the point on this one. If someone is in a car driving, they won't have nearly enough time to read through that whole thing word by word and see the effect. If someone is already drunk and reading it before getting into their car, the swaying of the sign will just blend in with the rest of the world spinning around them.
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How does that work? I'm thinking the illusion is due to the shading behind each letter making it seem that a light source is coming from a different direction for each letter. Did I get that right? Do I get a cookie?

I've printed as a jpeg and it's still moving.

And seriously, that's what it's like when magic mushroom start kicking in.
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Ha, at first I didn't notice anything at all but once that optical effect kicked in, it WAS pretty neat! I do agree with bean that it seems somewhat problematic in terms of drivers not having time to process the illusion, or of it being worryingly distracting to drunk (or sober!) drivers ... but even so I can't help but admire its cleverness =) Perhaps it'd be a good ad for those marquees inside airports, or subways, or other places where passersby are walking rather than driving ...
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My comment disappeared... these are called ECVP waves, I think this guy Akiyoshi Kitaoka invented them:

http://www.psy.ritsumei.ac.jp/~akitaoka/ECVPwaves.html

Here's an academic article on the subject:

http://www.perceptionweb.com/abstract.cgi?id=v070698
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Maybe the intent is that the police arrest all those people who stand in front of the sign looking at it with google eyes. Maybe.

I wonder what it looks like to those who do not read English?
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I can never see these optical illusions. Even reading each word one by one I just don't see it. I understand there is suppose to be some sort of "wavy" effect. Could someone describe what the illusion should look like?
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You can only see the effect when the eye moves across the image. If you stare at it steadily, it won't move. But move your eyes around it, and the words just past the edge of your best focus will seem to start waving.
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Oh I can never see these things. I focus too much on one point I think, or for some reason my brain can't be fooled by them. It might have something to do with the fact that I have no sight in one eye. I don't really know much about the science behind these, so I can't tell why I can't see them.
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