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Main Title: The effect of assuming static or dynamic gaze behaviour on the estimated background luminance of drivers
Author(s): Winter, Jan
Fotios, Steve
Völker, Stephan
Type: Article
Language Code: en
Abstract: Application of the Commission Internationale de l’Eclairage system for mesopic photometry requires that an estimate is made of the observers’ state of luminance adaptation. This paper addresses an assumption made when estimating background luminance, a component of adaptation luminance. Specifically, using spatial sampling of the visual field we compare background luminances determined from assumptions of static or dynamic visual gaze, the former being a simplification, the latter being a better representation based on eye movements when driving. The comparison was undertaken with luminance images of urban scenes at night on three roads, two real and one simulated. It was found that background luminances were significantly higher when estimated using the dynamic assumption. It was also found that scene luminances at the point of foveal fixations tend to be higher than those luminances influencing peripheral regions of the retina. Compared with the background luminance estimated for a dynamic peripheral field, a horizon-centred 10° circle led to a slightly higher estimate and the road surface luminance to a slightly lower estimate of background luminance.
Issue Date: 15-Feb-2018
Date Available: 4-Jun-2018
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): adaptation
peripheral vision
system of mesopic photometry
spatial sampling
eye movement
Sponsor/Funder: BMBF, 13N10815, Messung und Simulation des photopischen und mesopischen Sehens: Psychophysiologische Maße zur Beurteilung von Beleuchtungseinrichtungen
Journal Title: Lighting research and technology
Publisher: Sage Publications
Publisher Place: London [u.a.]
Publisher DOI: 10.1177/1477153518757594
EISSN: 1477-1535
ISSN: 1365-7828
Appears in Collections:FG Lichttechnik » Publications

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