Orientation invariance in visual shape perception

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Orientation invariance in visual shape perception.

To assess directly the orientation-invariance of specific shape representation stages in humans, we examined whether rotation (on the image plane or in depth) modulates the conjunction and linear non-separability effects in a shape visual search task (M. Arguin & D. Saumier, 2000; D. Saumier & M. Arguin, 2003). A series of visual search experiments involving simple 2D or 3D shapes show that the...

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Although it is generally assumed thot vision is orientation invariant, that is, that shapes can be recognized regardless of viewing angle, there is little evidence that speaks directly to this issue, ond what evidence there is fails to support orientation invariance. We propose an explanation for the previous results in terms of the kinds of shape primitives used by the visual system in achievi...

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ژورنال

عنوان ژورنال: Journal of Vision

سال: 2009

ISSN: 1534-7362

DOI: 10.1167/9.2.14