A texture-processing model of the 'visual sense of number'

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dc.contributor.author Morgan, M en
dc.contributor.author Raphael, S en
dc.contributor.author Tibber, M en
dc.contributor.author Dakin, Steven en
dc.coverage.spatial England en
dc.date.accessioned 2017-11-15T01:55:28Z en
dc.date.issued 2014-09-07 en
dc.identifier.citation Proceedings of the Royal Society B: Biological Sciences 281(1790):1137. 07 Sep 2014 en
dc.identifier.issn 0962-8452 en
dc.identifier.uri http://hdl.handle.net/2292/36422 en
dc.description.abstract It has been suggested that numerosity is an elementary quality of perception, similar to colour. If so (and despite considerable investigation), its mechanism remains unknown. Here, we show that observers require on average a massive difference of approximately 40% to detect a change in the number of objects that vary irrelevantly in blur, contrast and spatial separation, and that some naive observers require even more than this. We suggest that relative numerosity is a type of texture discrimination and that a simple model computing the contrast energy at fine spatial scales in the image can perform at least as well as human observers. Like some human observers, this mechanism finds it harder to discriminate relative numerosity in two patterns with different degrees of blur, but it still outpaces the human. We propose energy discrimination as a benchmark model against which more complex models and new data can be tested. en
dc.language eng en
dc.publisher Royal Society, The en
dc.relation.ispartofseries Proceedings of the Royal Society B: Biological Sciences en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject numerosity en
dc.subject psychophysics en
dc.subject texture perception en
dc.subject Adolescent en
dc.subject Adult en
dc.subject Aged en
dc.subject Computer Simulation en
dc.subject Contrast Sensitivity en
dc.subject Discrimination (Psychology) en
dc.subject Female en
dc.subject Humans en
dc.subject Male en
dc.subject Middle Aged en
dc.subject Pattern Recognition, Visual en
dc.title A texture-processing model of the 'visual sense of number' en
dc.type Journal Article en
dc.identifier.doi 10.1098/rspb.2014.1137 en
pubs.issue 1790 en
pubs.begin-page 1 en
pubs.volume 281 en
dc.rights.holder Copyright: The Royal Society en
dc.identifier.pmid 25030988 en
pubs.end-page 9 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 447396 en
pubs.org-id Medical and Health Sciences en
pubs.org-id Optometry and Vision Science en
dc.identifier.eissn 1471-2954 en
dc.identifier.pii rspb.2014.1137 en
pubs.record-created-at-source-date 2017-11-15 en
pubs.online-publication-date 2014-07-16 en
pubs.dimensions-id 25030988 en

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