Psychovisual evaluations of many luminous environments on the internet

Abstract

In the process of lighting design, usually many lighting alternatives are assessed against criteria such as energy consumption, lamp type, price and also user preferences collected through psychovisual experiments. However, these experiments induce subject fatigue, which limits the number of lighting alternatives that can be evaluated. To overcome this limitation, we propose a new protocol based on (1) the use of the internet and (2) an incomplete experimental design in which each subject judges only a subset of the whole set of visual stimuli. This protocol is validated by comparing three experiments conducted in the laboratory and online. No statistical difference was highlighted between the results of the experiments. Extrapolations suggest that this protocol could be used to assess up to 3000 visual stimuli.

Impact of lighting design on brand image for fashion retail stores

“…A larger test group would also benefit from the different viewing conditions on different monitors. 91 This study and its light scenes concentrate on qualitative lighting concepts and therefore include general recommendations for retail lighting, but an analysis of visual performance encompassing aspects such as colour rendering or glare was not carried out. The display of the visualisations on monitors also limited the possible luminance contrast in relation to the real environment.…”

A suitable and energy-efficient luminous environment for a shared office

“…-O Shad ¼ 08, 458, 908 or 1508; According to previous validation work, 10,15 psychovisual tests can be conducted on the internet with around 100 observers to remove bias due to uncontrolled conditions, 10 and can be built with balanced incomplete block experimental design to limit the duration of the experiment for each observer. 15…”

“…Moreover, the validation of psychovisual tests on the internet was conducted with images produced with V-Ray. 10,15 The experimental campaign lasted four months. Subjects could select the time they wanted to spend doing the experiment, and so some of them provided data for several psychovisual tests.…”