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Director Field Model of the Primary Visual Cortex for Contour Detection

We aim to build the simplest possible model capable of detecting long, noisy contours in a cluttered visual scene. For this, we model the neural dynamics in the primate primary visual cortex in terms of a continuous director field that describes the average rate and the average orientational prefere...

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Detalles Bibliográficos
Autores principales: Singh, Vijay, Tchernookov, Martin, Butterfield, Rebecca, Nemenman, Ilya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4201468/
https://www.ncbi.nlm.nih.gov/pubmed/25329158
http://dx.doi.org/10.1371/journal.pone.0108991
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author Singh, Vijay
Tchernookov, Martin
Butterfield, Rebecca
Nemenman, Ilya
author_facet Singh, Vijay
Tchernookov, Martin
Butterfield, Rebecca
Nemenman, Ilya
author_sort Singh, Vijay
collection PubMed
description We aim to build the simplest possible model capable of detecting long, noisy contours in a cluttered visual scene. For this, we model the neural dynamics in the primate primary visual cortex in terms of a continuous director field that describes the average rate and the average orientational preference of active neurons at a particular point in the cortex. We then use a linear-nonlinear dynamical model with long range connectivity patterns to enforce long-range statistical context present in the analyzed images. The resulting model has substantially fewer degrees of freedom than traditional models, and yet it can distinguish large contiguous objects from the background clutter by suppressing the clutter and by filling-in occluded elements of object contours. This results in high-precision, high-recall detection of large objects in cluttered scenes. Parenthetically, our model has a direct correspondence with the Landau - de Gennes theory of nematic liquid crystal in two dimensions.
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spelling pubmed-42014682014-10-21 Director Field Model of the Primary Visual Cortex for Contour Detection Singh, Vijay Tchernookov, Martin Butterfield, Rebecca Nemenman, Ilya PLoS One Research Article We aim to build the simplest possible model capable of detecting long, noisy contours in a cluttered visual scene. For this, we model the neural dynamics in the primate primary visual cortex in terms of a continuous director field that describes the average rate and the average orientational preference of active neurons at a particular point in the cortex. We then use a linear-nonlinear dynamical model with long range connectivity patterns to enforce long-range statistical context present in the analyzed images. The resulting model has substantially fewer degrees of freedom than traditional models, and yet it can distinguish large contiguous objects from the background clutter by suppressing the clutter and by filling-in occluded elements of object contours. This results in high-precision, high-recall detection of large objects in cluttered scenes. Parenthetically, our model has a direct correspondence with the Landau - de Gennes theory of nematic liquid crystal in two dimensions. Public Library of Science 2014-10-17 /pmc/articles/PMC4201468/ /pubmed/25329158 http://dx.doi.org/10.1371/journal.pone.0108991 Text en © 2014 Singh et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Singh, Vijay
Tchernookov, Martin
Butterfield, Rebecca
Nemenman, Ilya
Director Field Model of the Primary Visual Cortex for Contour Detection
title Director Field Model of the Primary Visual Cortex for Contour Detection
title_full Director Field Model of the Primary Visual Cortex for Contour Detection
title_fullStr Director Field Model of the Primary Visual Cortex for Contour Detection
title_full_unstemmed Director Field Model of the Primary Visual Cortex for Contour Detection
title_short Director Field Model of the Primary Visual Cortex for Contour Detection
title_sort director field model of the primary visual cortex for contour detection
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4201468/
https://www.ncbi.nlm.nih.gov/pubmed/25329158
http://dx.doi.org/10.1371/journal.pone.0108991
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AT nemenmanilya directorfieldmodeloftheprimaryvisualcortexforcontourdetection