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Dynamics of 3D view invariance in monkey inferotemporal cortex

Rotations in depth are challenging for object vision because features can appear, disappear, be stretched or compressed. Yet we easily recognize objects across views. Are the underlying representations view invariant or dependent? This question has been intensely debated in human vision, but the neu...

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Detalles Bibliográficos
Autores principales: Ratan Murty, N. Apurva, Arun, Sripati P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Physiological Society 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4416554/
https://www.ncbi.nlm.nih.gov/pubmed/25609108
http://dx.doi.org/10.1152/jn.00810.2014
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author Ratan Murty, N. Apurva
Arun, Sripati P.
author_facet Ratan Murty, N. Apurva
Arun, Sripati P.
author_sort Ratan Murty, N. Apurva
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description Rotations in depth are challenging for object vision because features can appear, disappear, be stretched or compressed. Yet we easily recognize objects across views. Are the underlying representations view invariant or dependent? This question has been intensely debated in human vision, but the neuronal representations remain poorly understood. Here, we show that for naturalistic objects, neurons in the monkey inferotemporal (IT) cortex undergo a dynamic transition in time, whereby they are initially sensitive to viewpoint and later encode view-invariant object identity. This transition depended on two aspects of object structure: it was strongest when objects foreshortened strongly across views and were similar to each other. View invariance in IT neurons was present even when objects were reduced to silhouettes, suggesting that it can arise through similarity between external contours of objects across views. Our results elucidate the viewpoint debate by showing that view invariance arises dynamically in IT neurons out of a representation that is initially view dependent.
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spelling pubmed-44165542015-05-13 Dynamics of 3D view invariance in monkey inferotemporal cortex Ratan Murty, N. Apurva Arun, Sripati P. J Neurophysiol Sensory Processing Rotations in depth are challenging for object vision because features can appear, disappear, be stretched or compressed. Yet we easily recognize objects across views. Are the underlying representations view invariant or dependent? This question has been intensely debated in human vision, but the neuronal representations remain poorly understood. Here, we show that for naturalistic objects, neurons in the monkey inferotemporal (IT) cortex undergo a dynamic transition in time, whereby they are initially sensitive to viewpoint and later encode view-invariant object identity. This transition depended on two aspects of object structure: it was strongest when objects foreshortened strongly across views and were similar to each other. View invariance in IT neurons was present even when objects were reduced to silhouettes, suggesting that it can arise through similarity between external contours of objects across views. Our results elucidate the viewpoint debate by showing that view invariance arises dynamically in IT neurons out of a representation that is initially view dependent. American Physiological Society 2015-01-21 2015-04 /pmc/articles/PMC4416554/ /pubmed/25609108 http://dx.doi.org/10.1152/jn.00810.2014 Text en Copyright © 2015 the American Physiological Society Licensed under Creative Commons Attribution CC-BY 3.0 (http://creativecommons.org/licenses/by/3.0/deed.en_US) : © the American Physiological Society.
spellingShingle Sensory Processing
Ratan Murty, N. Apurva
Arun, Sripati P.
Dynamics of 3D view invariance in monkey inferotemporal cortex
title Dynamics of 3D view invariance in monkey inferotemporal cortex
title_full Dynamics of 3D view invariance in monkey inferotemporal cortex
title_fullStr Dynamics of 3D view invariance in monkey inferotemporal cortex
title_full_unstemmed Dynamics of 3D view invariance in monkey inferotemporal cortex
title_short Dynamics of 3D view invariance in monkey inferotemporal cortex
title_sort dynamics of 3d view invariance in monkey inferotemporal cortex
topic Sensory Processing
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4416554/
https://www.ncbi.nlm.nih.gov/pubmed/25609108
http://dx.doi.org/10.1152/jn.00810.2014
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