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Titolo:
NEURAL DYNAMICS OF MOTION PERCEPTION - DIRECTION FIELDS, APERTURES, AND RESONANT GROUPING
Autore:
GROSSBERG S; MINGOLLA E;
Indirizzi:
BOSTON UNIV,DEPT COGNIT & NEURAL SYST,CTR ADAPT SYST,111 CUMMINGTON ST BOSTON MA 02215
Titolo Testata:
Perception & psychophysics
fascicolo: 3, volume: 53, anno: 1993,
pagine: 243 - 278
SICI:
0031-5117(1993)53:3<243:NDOMP->2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONKEY VISUAL-CORTEX; APPARENT MOTION; BRIGHTNESS PERCEPTION; 3-DIMENSIONAL FORM; SPATIAL-FREQUENCY; MACAQUE MONKEY; SUBJECTIVE CONTOURS; CORTICAL DYNAMICS; ILLUSORY CONTOURS; FEATURE LINKING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Science Citation Index Expanded
Citazioni:
108
Recensione:
Indirizzi per estratti:
Citazione:
S. Grossberg e E. Mingolla, "NEURAL DYNAMICS OF MOTION PERCEPTION - DIRECTION FIELDS, APERTURES, AND RESONANT GROUPING", Perception & psychophysics, 53(3), 1993, pp. 243-278

Abstract

A neural network model of global motion segmentation by visual cortexis described. Called the motion boundary contour system (BCS), the model clarifies how ambiguous local movements on a complex moving shape are actively reorganized into a coherent global motion signal. Unlike many previous researchers, we analyze how a coherent motion signal is imparted to all regions of a moving figure, not only to regions at which unambiguous motion signals exist. The model hereby suggests a solution to the global aperture problem. The motion BCS describes how preprocessing of motion signals by a motion oriented contrast (MOC) filter is joined to long-range cooperative grouping mechanisms in a motion cooperative-competitive (MOCC) loop to control phenomena such as motion capture. The motion BCS is computed in parallel with the static BCS ofGrossberg and Mingolla (1985a, 1985b, 1987). Homologous properties ofthe motion BCS and the static BCS, specialized to process motion directions and static orientations, respectively, support a unified explanation of many data about static form perception and motion form perception that have heretofore been unexplained or treated separately. Predictions about microscopic computational differences of the parallel cortical streams V1 --> MT and V1 --> V2 --> MT are made-notably, the magnocellular thick stripe and parvocellular interstripe streams. It is shown how the motion BCS can compute motion directions that may be synthesized from multiple orientations with opposite directions of contrast. Interactions of model simple cells, complex cells, hypercomplex cells, and bipole cells are described, with special emphasis given to new functional roles in direction disambiguation for endstopping at multiple processing stages and to the dynamic interplay of spatially short-range and long-range interactions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 17:00:22