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Synergy of features enables detection of texture defined figures

Synergy of features enables detection of texture defined figures Spatial Vision , Vol. 19, No. 1, pp. 77 – 102 (2006)  VSP 2006. Also available online - www.vsppub.com Synergy of features enables detection of texture defined figures MALTE PERSIKE ∗ and GÜNTER MEINHARDT † Johannes Gutenberg Universität Mainz, Social Sciences and Psychology, Methods Section, Staudinger Weg 9, D-55099 Mainz, Germany Received 11 April 2005; accepted 1 September 2005 Abstract —Traditional theories of early visual processing suggest that elementary visual features are handled in parallel by independent neural pathways. We studied the interaction of orientation and spatial frequency in the discrimination of Gabor random fields. Target textures differed from reference textures either in mean feature value, showing an edge-like transition between both textures (edge defined), or in the degree of feature homogeneity with smooth transitions (region defined). Irrespective of the kind of texture definition, we found strong cue summation for targets defined by both cues simultaneously, provided two conditions were fulfilled. First, they were barely discriminable when defined by one cue alone. Second, the target elements formed a closed 2D surface. Only marginal cue summation was observed when target elements were heterogeneously distributed in a predefined area, lacking a clear 2D shape. Our findings indicate that feature http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spatial Vision (continued as Seeing & Perceiving from 2010) Brill

Synergy of features enables detection of texture defined figures

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References (29)

Publisher
Brill
Copyright
© 2006 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0169-1015
eISSN
1568-5683
DOI
10.1163/156856806775009214
Publisher site
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Abstract

Spatial Vision , Vol. 19, No. 1, pp. 77 – 102 (2006)  VSP 2006. Also available online - www.vsppub.com Synergy of features enables detection of texture defined figures MALTE PERSIKE ∗ and GÜNTER MEINHARDT † Johannes Gutenberg Universität Mainz, Social Sciences and Psychology, Methods Section, Staudinger Weg 9, D-55099 Mainz, Germany Received 11 April 2005; accepted 1 September 2005 Abstract —Traditional theories of early visual processing suggest that elementary visual features are handled in parallel by independent neural pathways. We studied the interaction of orientation and spatial frequency in the discrimination of Gabor random fields. Target textures differed from reference textures either in mean feature value, showing an edge-like transition between both textures (edge defined), or in the degree of feature homogeneity with smooth transitions (region defined). Irrespective of the kind of texture definition, we found strong cue summation for targets defined by both cues simultaneously, provided two conditions were fulfilled. First, they were barely discriminable when defined by one cue alone. Second, the target elements formed a closed 2D surface. Only marginal cue summation was observed when target elements were heterogeneously distributed in a predefined area, lacking a clear 2D shape. Our findings indicate that feature

Journal

Spatial Vision (continued as Seeing & Perceiving from 2010) – Brill

Published: Jan 1, 2006

Keywords: CUE SUMMATION; INDEPENDENCE; FEATURE SYNERGY

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