Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.

The visual world is complex and continuously changing. Yet, our brain transforms patterns of light falling on our retina into a coherent percept within a few hundred milliseconds. Possibly, low-level neural responses already carry substantial information to facilitate rapid characterization of the v...

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Autores principales:	Iris I A Groen, Sennay Ghebreab, Victor A F Lamme, H Steven Scholte
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/05d60bf9c3684a53a52d7d18c8020da7
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id	oai:doaj.org-article:05d60bf9c3684a53a52d7d18c8020da7
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spelling	oai:doaj.org-article:05d60bf9c3684a53a52d7d18c8020da72021-11-18T05:52:47ZSpatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.1553-734X1553-735810.1371/journal.pcbi.1002726https://doaj.org/article/05d60bf9c3684a53a52d7d18c8020da72012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23093921/?tool=EBIhttps://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358The visual world is complex and continuously changing. Yet, our brain transforms patterns of light falling on our retina into a coherent percept within a few hundred milliseconds. Possibly, low-level neural responses already carry substantial information to facilitate rapid characterization of the visual input. Here, we computationally estimated low-level contrast responses to computer-generated naturalistic images, and tested whether spatial pooling of these responses could predict image similarity at the neural and behavioral level. Using EEG, we show that statistics derived from pooled responses explain a large amount of variance between single-image evoked potentials (ERPs) in individual subjects. Dissimilarity analysis on multi-electrode ERPs demonstrated that large differences between images in pooled response statistics are predictive of more dissimilar patterns of evoked activity, whereas images with little difference in statistics give rise to highly similar evoked activity patterns. In a separate behavioral experiment, images with large differences in statistics were judged as different categories, whereas images with little differences were confused. These findings suggest that statistics derived from low-level contrast responses can be extracted in early visual processing and can be relevant for rapid judgment of visual similarity. We compared our results with two other, well- known contrast statistics: Fourier power spectra and higher-order properties of contrast distributions (skewness and kurtosis). Interestingly, whereas these statistics allow for accurate image categorization, they do not predict ERP response patterns or behavioral categorization confusions. These converging computational, neural and behavioral results suggest that statistics of pooled contrast responses contain information that corresponds with perceived visual similarity in a rapid, low-level categorization task.Iris I A GroenSennay GhebreabVictor A F LammeH Steven ScholtePublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 8, Iss 10, p e1002726 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Iris I A Groen Sennay Ghebreab Victor A F Lamme H Steven Scholte Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
description	The visual world is complex and continuously changing. Yet, our brain transforms patterns of light falling on our retina into a coherent percept within a few hundred milliseconds. Possibly, low-level neural responses already carry substantial information to facilitate rapid characterization of the visual input. Here, we computationally estimated low-level contrast responses to computer-generated naturalistic images, and tested whether spatial pooling of these responses could predict image similarity at the neural and behavioral level. Using EEG, we show that statistics derived from pooled responses explain a large amount of variance between single-image evoked potentials (ERPs) in individual subjects. Dissimilarity analysis on multi-electrode ERPs demonstrated that large differences between images in pooled response statistics are predictive of more dissimilar patterns of evoked activity, whereas images with little difference in statistics give rise to highly similar evoked activity patterns. In a separate behavioral experiment, images with large differences in statistics were judged as different categories, whereas images with little differences were confused. These findings suggest that statistics derived from low-level contrast responses can be extracted in early visual processing and can be relevant for rapid judgment of visual similarity. We compared our results with two other, well- known contrast statistics: Fourier power spectra and higher-order properties of contrast distributions (skewness and kurtosis). Interestingly, whereas these statistics allow for accurate image categorization, they do not predict ERP response patterns or behavioral categorization confusions. These converging computational, neural and behavioral results suggest that statistics of pooled contrast responses contain information that corresponds with perceived visual similarity in a rapid, low-level categorization task.
format	article
author	Iris I A Groen Sennay Ghebreab Victor A F Lamme H Steven Scholte
author_facet	Iris I A Groen Sennay Ghebreab Victor A F Lamme H Steven Scholte
author_sort	Iris I A Groen
title	Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
title_short	Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
title_full	Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
title_fullStr	Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
title_full_unstemmed	Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
title_sort	spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/05d60bf9c3684a53a52d7d18c8020da7
work_keys_str_mv	AT irisiagroen spatiallypooledcontrastresponsespredictneuralandperceptualsimilarityofnaturalisticimagecategories AT sennayghebreab spatiallypooledcontrastresponsespredictneuralandperceptualsimilarityofnaturalisticimagecategories AT victoraflamme spatiallypooledcontrastresponsespredictneuralandperceptualsimilarityofnaturalisticimagecategories AT hstevenscholte spatiallypooledcontrastresponsespredictneuralandperceptualsimilarityofnaturalisticimagecategories
_version_	1718424708552065024

Spatially pooled contrast responses predict neural and perceptual similarity of naturalistic image categories.

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