Ambiguous Figures edit

Ambiguous figures focuses exclusively on illusions that affect the spatial relationships of the image or the perception of reality (from photographs). Ambiguous figures is not interested by the optico-geometric illusions (size, shape, direction,...), or from color, from movement ...
The ambiguities of the representation or of the perception of depth concern the spacing out of plans in the depth of the real space or represented and the orientation of surfaces within this same space.
From the side of the spacing out of plans, the images the best known are : the Rubin's Vase or the Necker's Cube (who also works orientation of the surfaces). From the side of the orientation of surfaces, the most famous images are the Necker's Cube or "My wife and my mother" of Hill.

ADDENDUM
One research work on the impossible and ambiguous figures was published in 2001, this work can be viewed on paper or on the web :
- Michel Bellot, "Esthétique des figures impossibles et ambiguës", Presses universitaires du Septentrion, 2001, ISBN : 978-2-7295-4291-7
- Ambiguous figures French site about ambiguous figures (only spatial relations)
- Ambiguous figures English entrance Only one english personal page ! Sorry, but "Google Translate" is better than me.