46

Visual Cryptography(upload.wikimedia.org)

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Darwin@feddit.deM
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interesting@feddit.de
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Knusper@feddit.de
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The particular concept shown in the post wouldn’t really work with glasses, because you need perfect alignment. It’s actually irrelevant that they’re different colors.

I don’t know what those glasses actually look like, but the general idea is probably similar. You present lots of information and filter out the noise.
With glasses, you can do that via color-tint, polarised light or by having them block out every other frame. These tricks are commonly used in 3D glasses, too, as you need different information on each eye…

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