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Titolo:
STRUCTURE-FROM-MOTION - PERCEPTUAL EVIDENCE FOR SURFACE INTERPOLATION
Autore:
TREUE S; ANDERSEN RA; ANDO H; HILDRETH EC;
Indirizzi:
WELLESLEY COLL,DEPT COMP SCI WELLESLEY MA 02181 WELLESLEY COLL,DEPT COMP SCI WELLESLEY MA 02181 MIT,DEPT BRAIN & COGNIT SCI CAMBRIDGE MA 02139 BAYLOR COLL MED,DIV NEUROSCI HOUSTON TX 77030 CALTECH,DIV BIOL PASADENA CA 91125 ATR HUMAN INFORMAT PROC LABS KYOTO JAPAN
Titolo Testata:
Vision research
fascicolo: 1, volume: 35, anno: 1994,
pagine: 139 - 148
SICI:
0042-6989(1994)35:1<139:S-PEFS>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPTIC FLOW; DEPTH; CUES; SEGMENTATION; BOUNDARIES; OCCLUSION; VELOCITY; OBJECTS;
Keywords:
STRUCTURE-FROM-MOTION; SURFACE INTERPOLATION; SPATIAL INTEGRATION; TEMPORAL INTEGRATION; RANDOM-DOT PATTERNS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
S. Treue et al., "STRUCTURE-FROM-MOTION - PERCEPTUAL EVIDENCE FOR SURFACE INTERPOLATION", Vision research, 35(1), 1994, pp. 139-148

Abstract

Dynamic random-dot displays representing a rotating cylinder were used to investigate surface interpolation in the perception of structure-from-motion (SFM) in humans. Surface interpolation refers to a processin which a complete surface in depth is reconstructed from the objectdepth values extracted at the stimulus features. Surface interpolation will assign depth values even in parts of the object that contain nofeatures. Such a ''fill-in'' process should make the detection of featureless stimulus areas (''hools'') difficult. Indeed, we demonstrate that such holes in our rotating cylinder can be as wide as one-quarterof the stimulus before subjects can reliably detect their presence. Subjects were presented with a variation on the rotating cylinder in which all dots were oscillating either in synchrony or asynchronously. Subjects perceive a rigidly rotating cylinder even when such a percept is not in agreement with the physical stimulus. To reconcile this discrepancy between actual and perceived stimulus we propose that individual points contribute to a surface based object representation and thatin this process the visual system looses access to the identity of the individual features that make up the surface. Finally we are able toexplain a variety of previously documented perceptual peculiarities in the perception of structure-from-motion by arguing that the perceptual interpretation of the object's boundaries influences the surface interpolation process. These findings offer strong perceptual evidence for a process of surface interpolation and are also physiologically plausible given results from recordings in awake behaving monkey corticalareas V1 and MT. The companion paper demonstrates how such a surface interpolation process can be incorporated into a structure-from-motionalgorithm acid how object boundaries can influence the perception of structure-from-motion as has been demonstrated before and in this paper.

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Documento generato il 18/09/20 alle ore 20:07:44