Inner contrast and perceptual quality in tasks with video display units

Autores
O´donell, Beatriz Maria; Colombo, Elisa Margarita
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The purpose of this paper is to find the physical luminance contrast of an image that best relates to perceptual quality in VDU achromatic tasks. The studies were carried out by measurement of visual performance, comfort judgements and contrast adjustment, taking into account different resolutions, polarities, background luminances and illuminance values. The results add a new piece of evidence about inner contrast as an appropriate criterion to describe perceptual contrast. Inner contrast also provides a satisfactory criterion for the optimum relation of luminances in inner details of characters. This paper shows that when the relation between suprathreshold perceptual response and stimulus magnitude - inner contrast - is plotted, the power function relationship is a curve that is concave downward; there is a compression of the perceptual response. Illuminance on the horizontal plane, within the experimental range (480 and 930 lux) is not a significant parameter. Background luminance is significant for comfort judgements and contrast adjustment trials, but not for visual performance results. Grey background and characters brighter than background seem to be preferred by the observers. Mean luminance contrasts higher than 5 are sufficient to reach a visual performance of 90% and good visual comfort. The corresponding inner contrast is 1.4.
Fil: O´donell, Beatriz Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; Argentina
Fil: Colombo, Elisa Margarita. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina
Materia
INNER CONTRAST
CRT MONITORS
PERCEPTUAL QUALITY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/105643
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Inner contrast and perceptual quality in tasks with video display unitsO´donell, Beatriz MariaColombo, Elisa MargaritaINNER CONTRASTCRT MONITORSPERCEPTUAL QUALITYhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2The purpose of this paper is to find the physical luminance contrast of an image that best relates to perceptual quality in VDU achromatic tasks. The studies were carried out by measurement of visual performance, comfort judgements and contrast adjustment, taking into account different resolutions, polarities, background luminances and illuminance values. The results add a new piece of evidence about inner contrast as an appropriate criterion to describe perceptual contrast. Inner contrast also provides a satisfactory criterion for the optimum relation of luminances in inner details of characters. This paper shows that when the relation between suprathreshold perceptual response and stimulus magnitude - inner contrast - is plotted, the power function relationship is a curve that is concave downward; there is a compression of the perceptual response. Illuminance on the horizontal plane, within the experimental range (480 and 930 lux) is not a significant parameter. Background luminance is significant for comfort judgements and contrast adjustment trials, but not for visual performance results. Grey background and characters brighter than background seem to be preferred by the observers. Mean luminance contrasts higher than 5 are sufficient to reach a visual performance of 90% and good visual comfort. The corresponding inner contrast is 1.4.Fil: O´donell, Beatriz Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; ArgentinaFil: Colombo, Elisa Margarita. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; ArgentinaSage Publications Ltd2001-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/105643O´donell, Beatriz Maria; Colombo, Elisa Margarita; Inner contrast and perceptual quality in tasks with video display units; Sage Publications Ltd; Lighting Research & Technology; 33; 3; 9-2001; 145-1611365-78281477-1535CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1177/136578280103300302info:eu-repo/semantics/altIdentifier/url/https://journals.sagepub.com/doi/10.1177/136578280103300302info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:47:52Zoai:ri.conicet.gov.ar:11336/105643instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:47:52.22CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Inner contrast and perceptual quality in tasks with video display units
title Inner contrast and perceptual quality in tasks with video display units
spellingShingle Inner contrast and perceptual quality in tasks with video display units
O´donell, Beatriz Maria
INNER CONTRAST
CRT MONITORS
PERCEPTUAL QUALITY
title_short Inner contrast and perceptual quality in tasks with video display units
title_full Inner contrast and perceptual quality in tasks with video display units
title_fullStr Inner contrast and perceptual quality in tasks with video display units
title_full_unstemmed Inner contrast and perceptual quality in tasks with video display units
title_sort Inner contrast and perceptual quality in tasks with video display units
dc.creator.none.fl_str_mv O´donell, Beatriz Maria
Colombo, Elisa Margarita
author O´donell, Beatriz Maria
author_facet O´donell, Beatriz Maria
Colombo, Elisa Margarita
author_role author
author2 Colombo, Elisa Margarita
author2_role author
dc.subject.none.fl_str_mv INNER CONTRAST
CRT MONITORS
PERCEPTUAL QUALITY
topic INNER CONTRAST
CRT MONITORS
PERCEPTUAL QUALITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The purpose of this paper is to find the physical luminance contrast of an image that best relates to perceptual quality in VDU achromatic tasks. The studies were carried out by measurement of visual performance, comfort judgements and contrast adjustment, taking into account different resolutions, polarities, background luminances and illuminance values. The results add a new piece of evidence about inner contrast as an appropriate criterion to describe perceptual contrast. Inner contrast also provides a satisfactory criterion for the optimum relation of luminances in inner details of characters. This paper shows that when the relation between suprathreshold perceptual response and stimulus magnitude - inner contrast - is plotted, the power function relationship is a curve that is concave downward; there is a compression of the perceptual response. Illuminance on the horizontal plane, within the experimental range (480 and 930 lux) is not a significant parameter. Background luminance is significant for comfort judgements and contrast adjustment trials, but not for visual performance results. Grey background and characters brighter than background seem to be preferred by the observers. Mean luminance contrasts higher than 5 are sufficient to reach a visual performance of 90% and good visual comfort. The corresponding inner contrast is 1.4.
Fil: O´donell, Beatriz Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; Argentina
Fil: Colombo, Elisa Margarita. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Luminotecnia, Luz y Visión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Investigación en Luz, Ambiente y Visión. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Instituto de Investigación en Luz, Ambiente y Visión; Argentina
description The purpose of this paper is to find the physical luminance contrast of an image that best relates to perceptual quality in VDU achromatic tasks. The studies were carried out by measurement of visual performance, comfort judgements and contrast adjustment, taking into account different resolutions, polarities, background luminances and illuminance values. The results add a new piece of evidence about inner contrast as an appropriate criterion to describe perceptual contrast. Inner contrast also provides a satisfactory criterion for the optimum relation of luminances in inner details of characters. This paper shows that when the relation between suprathreshold perceptual response and stimulus magnitude - inner contrast - is plotted, the power function relationship is a curve that is concave downward; there is a compression of the perceptual response. Illuminance on the horizontal plane, within the experimental range (480 and 930 lux) is not a significant parameter. Background luminance is significant for comfort judgements and contrast adjustment trials, but not for visual performance results. Grey background and characters brighter than background seem to be preferred by the observers. Mean luminance contrasts higher than 5 are sufficient to reach a visual performance of 90% and good visual comfort. The corresponding inner contrast is 1.4.
publishDate 2001
dc.date.none.fl_str_mv 2001-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/105643
O´donell, Beatriz Maria; Colombo, Elisa Margarita; Inner contrast and perceptual quality in tasks with video display units; Sage Publications Ltd; Lighting Research & Technology; 33; 3; 9-2001; 145-161
1365-7828
1477-1535
CONICET Digital
CONICET
url http://hdl.handle.net/11336/105643
identifier_str_mv O´donell, Beatriz Maria; Colombo, Elisa Margarita; Inner contrast and perceptual quality in tasks with video display units; Sage Publications Ltd; Lighting Research & Technology; 33; 3; 9-2001; 145-161
1365-7828
1477-1535
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1177/136578280103300302
info:eu-repo/semantics/altIdentifier/url/https://journals.sagepub.com/doi/10.1177/136578280103300302
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Sage Publications Ltd
publisher.none.fl_str_mv Sage Publications Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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