Staff View: Perceptual filling-in of stereoscopically presented targets

Perceptual filling-in of stereoscopically presented targets

PURPOSE: To investigate the influence of parametric variation on the filling-in latency of stereoscopically presented stimuli. METHODS: Anaglyphs were created using two circular patches of 0.3º diameter, 0.5º disparity and 6º eccentricity from fixation point. Targets were presented at the visual fie...

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Main Authors:	Couto, Márcia Furukawa, Pessoa, Valdir Filgueiras
Format:	Artigo
Language:	English
Published:	Conselho Brasileiro de Oftalmologia 2017
Subjects:	Perceptual masking Vision disparity Visual perception Visual field Mascaramento perceptivo Disparidade visual Percepção visual Campo visual
Online Access:	http://repositorio.unb.br/handle/10482/26823
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spelling	ir-10482-268232019-03-28T14:07:28Z Perceptual filling-in of stereoscopically presented targets Preenchimento perceptual de estímulos estereoscópicos Couto, Márcia Furukawa Pessoa, Valdir Filgueiras Perceptual masking Vision disparity Visual perception Visual field Mascaramento perceptivo Disparidade visual Percepção visual Campo visual PURPOSE: To investigate the influence of parametric variation on the filling-in latency of stereoscopically presented stimuli. METHODS: Anaglyphs were created using two circular patches of 0.3º diameter, 0.5º disparity and 6º eccentricity from fixation point. Targets were presented at the visual field midline, 90º and 270º positions, with crossed and uncrossed disparity. The time elapsed for disappearance of the target under voluntary steady fixation was computed. Eighteen subjects tested. RESULTS: There was no significant difference between crossed and uncrossed disparities, nor between near or far from the vertical horopter line. The significant difference was between upper and lower visual field positions. CONCLUSION: The results show that: (i) stereoscopic presentation does not influence the target filling-in latency; (ii) differences between dorsal and ventral visual stream might influence target filling-in latency. OBJETIVO: Investigar a influência da variação de parâmetros estereoscópicos na latência de preenchimento perceptual de estímulos 3D. MÉTODOS: Criados anáglifos com dois discos de 0,3º de diâmetro, 0,5º de disparidade e 6º de excentricidade do ponto central de fixação. Estímulos foram apresentados na linha central do campo visual, nas posições 90º e 270º, com disparidade cruzada e não cruzada. Registrado o tempo gasto para o preenchimento do estímulo sob fixação estável. Testados dezoito indivíduos. RESULTADOS: Não houve diferença significativa entre as disparidades cruzada e não cruzada, nem entre perto e longe da linha do horóptero vertical. Houve diferença significativa entre posição superior e inferior do campo visual. CONCLUSÕES: Os resultados mostram que: (i) a apresentação estereoscópica não tem influência na latência de preenchimento perceptual, (ii) diferenças entre o sistema visual dorsal e ventral podem influenciar a latência de preenchimento perceptual. 2017-12-07T04:46:14Z 2017-12-07T04:46:14Z 2007 Artigo Arq. Bras. Oftalmol.,v.70,n.1,p.101-104,2007 0004-2749 http://repositorio.unb.br/handle/10482/26823 10.1590/S0004-27492007000100018 en Acesso Aberto application/pdf Conselho Brasileiro de Oftalmologia http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492007000100018&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0004-27492007000100018&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0004-27492007000100018&lng=en&nrm=iso
institution	REPOSITORIO UNB
collection	REPOSITORIO UNB
language	English
topic	Perceptual masking Vision disparity Visual perception Visual field Mascaramento perceptivo Disparidade visual Percepção visual Campo visual
spellingShingle	Perceptual masking Vision disparity Visual perception Visual field Mascaramento perceptivo Disparidade visual Percepção visual Campo visual Couto, Márcia Furukawa Pessoa, Valdir Filgueiras Perceptual filling-in of stereoscopically presented targets
description	PURPOSE: To investigate the influence of parametric variation on the filling-in latency of stereoscopically presented stimuli. METHODS: Anaglyphs were created using two circular patches of 0.3º diameter, 0.5º disparity and 6º eccentricity from fixation point. Targets were presented at the visual field midline, 90º and 270º positions, with crossed and uncrossed disparity. The time elapsed for disappearance of the target under voluntary steady fixation was computed. Eighteen subjects tested. RESULTS: There was no significant difference between crossed and uncrossed disparities, nor between near or far from the vertical horopter line. The significant difference was between upper and lower visual field positions. CONCLUSION: The results show that: (i) stereoscopic presentation does not influence the target filling-in latency; (ii) differences between dorsal and ventral visual stream might influence target filling-in latency.
format	Artigo
author	Couto, Márcia Furukawa Pessoa, Valdir Filgueiras
author_sort	Couto, Márcia Furukawa
title	Perceptual filling-in of stereoscopically presented targets
title_short	Perceptual filling-in of stereoscopically presented targets
title_full	Perceptual filling-in of stereoscopically presented targets
title_fullStr	Perceptual filling-in of stereoscopically presented targets
title_full_unstemmed	Perceptual filling-in of stereoscopically presented targets
title_sort	perceptual filling-in of stereoscopically presented targets
publisher	Conselho Brasileiro de Oftalmologia
publishDate	2017
url	http://repositorio.unb.br/handle/10482/26823
_version_	1641988570990247936
score	13.657419

Perceptual filling-in of stereoscopically presented targets

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