Stereogram


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Where I can get a good free stereogram..

If you don't know what stereogram is, I attached one of my collection with this thread.. You should be able to see 3 spirals

Thanks..

post-52-1068315751.jpg

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I'm not sure if this is correct, but I read somewhere that they used this technique in WW2... they took two air surveillance photos of the same place, overlapped them with a slight side adjustment.. then they could easily spot the outlines of tanks and stuff even if they were camouflaged.

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