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Article: Perceiving heading in the presence of moving objects.

TitlePerceiving heading in the presence of moving objects.
Authors
Issue Date1995
PublisherPion Ltd.. The Journal's web site is located at http://www.perceptionweb.com
Citation
Perception, 1995, v. 24 n. 3, p. 315-331 How to Cite?
AbstractIn most models of heading from optic flow a rigid environment is assumed, yet humans often navigate in the presence of independently moving objects. Simple spatial pooling of the flow field would yield systematic heading errors. Alternatively, moving objects could be segmented on the basis of relative motion, dynamic occlusion, or inconsistency with the global flow, and heading determined from the background flow. Displays simulated observer translation toward a frontal random-dot plane, with a 10 deg square moving independently in depth. The path of motion of the object was varied to create a secondary focus of expansion (FOE') 6 deg to the right or left of the actual heading point (FOE), which could bias the perceived heading. There was no effect when the FOE was visible, but when the object moved in front of it, perceived heading was biased toward the FOE' by approximately 1.9 degrees with a transparent object, and approximately 3.4 degrees with an opaque object. The results indicate that scene segmentation does not occur prior to heading estimation, which is consistent with spatial pooling weighted near the FOE. A simple template model based on large-field, center-weighted expansion units accounts for the data. This may actually represent an adaptive solution for navigation with respect to obstacles on the path ahead.
Persistent Identifierhttp://hdl.handle.net/10722/168915
ISSN
2015 Impact Factor: 0.917
2015 SCImago Journal Rankings: 0.518
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWarren Jr, WHen_US
dc.contributor.authorSaunders, JAen_US
dc.date.accessioned2012-10-08T03:39:37Z-
dc.date.available2012-10-08T03:39:37Z-
dc.date.issued1995en_US
dc.identifier.citationPerception, 1995, v. 24 n. 3, p. 315-331en_US
dc.identifier.issn0301-0066en_US
dc.identifier.urihttp://hdl.handle.net/10722/168915-
dc.description.abstractIn most models of heading from optic flow a rigid environment is assumed, yet humans often navigate in the presence of independently moving objects. Simple spatial pooling of the flow field would yield systematic heading errors. Alternatively, moving objects could be segmented on the basis of relative motion, dynamic occlusion, or inconsistency with the global flow, and heading determined from the background flow. Displays simulated observer translation toward a frontal random-dot plane, with a 10 deg square moving independently in depth. The path of motion of the object was varied to create a secondary focus of expansion (FOE') 6 deg to the right or left of the actual heading point (FOE), which could bias the perceived heading. There was no effect when the FOE was visible, but when the object moved in front of it, perceived heading was biased toward the FOE' by approximately 1.9 degrees with a transparent object, and approximately 3.4 degrees with an opaque object. The results indicate that scene segmentation does not occur prior to heading estimation, which is consistent with spatial pooling weighted near the FOE. A simple template model based on large-field, center-weighted expansion units accounts for the data. This may actually represent an adaptive solution for navigation with respect to obstacles on the path ahead.en_US
dc.languageengen_US
dc.publisherPion Ltd.. The Journal's web site is located at http://www.perceptionweb.comen_US
dc.relation.ispartofPerceptionen_US
dc.subject.meshAnalysis Of Varianceen_US
dc.subject.meshDiscrimination (Psychology)en_US
dc.subject.meshHumansen_US
dc.subject.meshKinesthesis - Physiologyen_US
dc.subject.meshModels, Biologicalen_US
dc.subject.meshMotion Perception - Physiologyen_US
dc.subject.meshMultivariate Analysisen_US
dc.subject.meshPerceptual Distortionen_US
dc.subject.meshVisual Fieldsen_US
dc.titlePerceiving heading in the presence of moving objects.en_US
dc.typeArticleen_US
dc.identifier.emailSaunders, JA:jsaun@hkucc.hku.hken_US
dc.identifier.authoritySaunders, JA=rp00638en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid7617432-
dc.identifier.scopuseid_2-s2.0-0029187713en_US
dc.identifier.volume24en_US
dc.identifier.issue3en_US
dc.identifier.spage315en_US
dc.identifier.epage331en_US
dc.identifier.isiWOS:A1995QX96700005-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWarren Jr, WH=34573732800en_US
dc.identifier.scopusauthoridSaunders, JA=7402341514en_US

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