Français : Illusion de Ponzo. La ligne supérieure semble plus grande, alors qu'elle est de la même taille que la ligne inférieure.
Illusion de base de la perspective selon Richard Gregory, Seeing through illusions, 2009, p.187.
English: Ponzo's illusion. The upper horizontal line seems wider than the lower, though they are the same size.
The basic perspective illusion according toRichard Gregory, Seeing through illusions, 2009, p.187.
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