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English: seven rings as a demonstration of freeviewing in stereoscopy. Only freeviewers can find which of these rings is not attached to any other one and which one is not a circle.
Français : Sept anneaux, à titre de démonstration de la possibilité de voir en stéréoscopie sans outil (vision libre). Seuls ceux qui peuvent voir ainsi trouvent lequel de ces anneaux n'est attaché à aucun autre et lequel n'est pas un cercle mais est allongé.
Date août-septembre 1990
Source Bulletin du Stéréo-Club Français, n° 741
Author Sylvain Roques
(Reusing this file)

Dessin réalisé pour publication dans le bulletin du Stéréo-Club Français

Image ajoutée pour illustrer l'article "Stéréoscopie".


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EXIF data:
File name anneaux.jpg
Size, Mbytes 0.117481445313
Mime type image/jpeg
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