Haptic identification of curved surfaces.
Identifieur interne : 004534 ( Ncbi/Checkpoint ); précédent : 004533; suivant : 004535Haptic identification of curved surfaces.
Auteurs : A M Kappers [Pays-Bas] ; J J Koenderink ; I. LichteneggerSource :
- Perception & psychophysics [ 0031-5117 ] ; 1994.
English descriptors
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- MESH :
Abstract
In two experiments, the active haptic identification of three-dimensional mathematically well-defined objects is investigated. The objects, quadric surfaces, are defined in terms of the shape index, a quantity describing the shape, and curvedness, a quantity describing overall curvature. Both shape index and curvedness are found to have a significant influence on haptic shape identification. Concave surfaces lead to a larger spread in responses than convex ones. Hyperbolic surfaces show a slight tendency to be identified with more difficulty than elliptic ones. Surfaces with a high curvedness are identified more easily than those with a low curvedness. Results from experiments with constant and with random curvedness are indistinguishable. It is concluded that shape index and curvedness are psychophysically not confounded.
PubMed: 8084732
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