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dc.contributor.author
Vattuone, Nicolás Roberto
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dc.contributor.author
Wachtler, Thomas
dc.contributor.author
Samengo, Ines
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dc.date.available
2023-08-14T18:12:15Z
dc.date.issued
2021-07
dc.identifier.citation
Vattuone, Nicolás Roberto; Wachtler, Thomas; Samengo, Ines; Perceptual spaces and their symmetries: The geometry of color space; Episciences; Mathematical Neuroscience and Applications; 1; 7-2021; 1-34
dc.identifier.issn
2801-0159
dc.identifier.uri
http://hdl.handle.net/11336/208211
dc.description.abstract
Our sensory systems transform external signals into neural activity, therebyproducing percepts. We are endowed with an intuitive notion of similaritybetween percepts, that need not reflect the proximity of the physicalproperties of the corresponding external stimuli. The quantitativecharacterization of the geometry of percepts is therefore an endeavour thatmust be accomplished behaviorally. Here we characterized the geometry of colorspace using discrimination and matching experiments. We proposed anindividually tailored metric defined in terms of the minimal chromaticdifference required for each observer to differentiate a stimulus from itssurround. Next, we showed that this perceptual metric was particularly adequateto describe two additional experiments, since it revealed the natural symmetryof perceptual computations. In one of the experiments, observers were requiredto discriminate two stimuli surrounded by a chromaticity that differed fromthat of the tested stimuli. In the perceptual coordinates, the change indiscrimination thresholds induced by the surround followed a simple law thatonly depended on the perceptual distance between the surround and each of thetwo compared stimuli. In the other experiment, subjects were asked to match thecolor of two stimuli surrounded by two different chromaticities. Again, in theperceptual coordinates the induction effect produced by surrounds followed asimple, symmetric law. We conclude that the individually-tailored notion ofperceptual distance reveals the symmetry of the laws governing perceptualcomputations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Episciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
COLOR
dc.subject
GEOMETRY
dc.subject
PSYCHOPHYSICS
dc.subject
PERCEPTION
dc.subject.classification
Biofísica
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Perceptual spaces and their symmetries: The geometry of color space
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-08-14T17:35:52Z
dc.journal.volume
1
dc.journal.pagination
1-34
dc.journal.pais
Francia
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dc.description.fil
Fil: Vattuone, Nicolás Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Ludwig Maximilians Universitat; Alemania
dc.description.fil
Fil: Wachtler, Thomas. Ludwig Maximilians Universitat; Alemania
dc.description.fil
Fil: Samengo, Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
dc.journal.title
Mathematical Neuroscience and Applications
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://mna.episciences.org/7108
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.46298/mna.7108
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