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Now showing items 31-40 of 112
The ascending arousal system promotes optimal performance through mesoscale network integration in a visuospatial attentional task
(The Mit Press, 2021)
In our daily lives, it is usual to encounter highly demanding cognitive tasks. They have been traditionally regarded as challenges that are solved mainly through cerebral activity, specifically via information-processing ...
Resultados preliminares de um sistema computadorizado e estereoscópico para pupilometria in vivo
(Conselho Brasileiro de Oftalmologia, 2008-12-01)
PURPOSE: We developed a digital system with accommodation capacities for measurement of the diameter and shape of the in vivo pupil for 10 different levels of illumination intensity, varying from mesopic to photopic. ...
Extração de características da pupila para aplicações em sistemas biométricosExtraction of pupil features for applications in biometric systems
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia BiomédicaEngenharia Biomédica, 2023)
Pupilometria dinâmica : uma proposta de rastreamento da posição e tamanho da pupila humana em tempo real
(Universidade Federal de UberlândiaBRPrograma de Pós-graduação em Engenharia ElétricaEngenhariasUFU, 2016)
Sistema de medición del tamaño de la pupila con visión artificial para investigación en psicología e inteligencia artificial del Grupo IDEIAGEOCA.
(2022-03)
The objective of this work is to develop a system
for measuring pupil size with artificial vision, for research in
psychology of the IDEIAGEOCA Group. The system consists of
two stages: image preprocessing and segmentation; ...
Development of a low cost pupillometer-eyetracker and applications
(Spie, 2013-11)
The determination of ocular pupil diameter and gaze direction is important in various psychophysical and cognitive tests and can be accomplished using commercial, academic or open-source devices. In this work we develop a ...
Influence of ophthalmic lenses in the illuminance originated at a peripheral glare source and reaching the eye
(Elsevier Gmbh, 2009-11)
To study the influence of glare on the visual performance of a subject wearing an ophthalmic lens, it is useful to know how the lens affects the illuminance reaching the eye. In this paper, considering spherical standard ...
Pupilometria dinâmica: aplicação na detecção e avaliação da neuropatia autonômica diabética e estudo da correlação entre a resposta temporal da pupila ao estímulo visual e a glicemia
(Universidade Tecnológica Federal do ParanáCuritibaPrograma de Pós-Graduação em Engenharia Elétrica e Informática Industrial, 2008)
Autonomic neuropathy (AN) is a common and serious complication of diabetes. Early detection is essential to enable appropriate interventional therapy. Dynamic pupillometry has been proposed as simples and more sensitive ...
Sistema autônomo em FPGA para captura e processamento em tempo real de imagens da pupila
(Universidade Tecnológica Federal do ParanáCuritibaPrograma de Pós-Graduação em Engenharia Elétrica e Informática Industrial, 2011-06-28)
This dissertation proposes an algorithm and a corresponding hardware implementation capable of capturing images from the human eye and processing these images to obtain, in a portable, autonomous, secure, and non-invasive ...