Attribution: The original uploader was LosHawlos at German Wikipedia. Later versions were uploaded by Mr. Anderson at de.wikipedia., CC BY-SA 3.0, via Wikimedia Commons.
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Notes
A stereogram is a 3D picture within a picture. Hidden inside each image is an object which appears 3D when viewed correctly.
For information on how to see the effect, please visit the Wikipedia article on Autostereograms.
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