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Volume: 27 | Article ID: art00062
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Smartphone-based measurement of the melanopic daylight efficacy ratio
  DOI :  10.2352/issn.2169-2629.2019.27.62  Published OnlineOctober 2019
Abstract

Recently, the CIE published a new standard in which the so called 'melanopic daylight efficacy ratio' (abbreviated to melanopic DER) is introduced. This number is helpful in estimating the impact that a light source may have on our circadian rhythm. Although the melanopic DER can be directly calculated from the spectral power distribution, in case the latter is unknown a spectrophotometer or similar instrument is required, which is usually unavailable to the general public. Here we demonstrate how the melanopic DER can be accurately estimated from a smartphone image of two selected color samples. In addition, using the smartphone's camera parameters we provide a method to estimate the illuminance. Combined these measurements allow an evaluation of the absolute melanopic stimulation.

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Marcel Lucassen, Dragan Sekulovski, Tobias Borra, "Smartphone-based measurement of the melanopic daylight efficacy ratioin Proc. IS&T 27th Color and Imaging Conf.,  2019,  pp 344 - 348,  https://doi.org/10.2352/issn.2169-2629.2019.27.62

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Copyright © Society for Imaging Science and Technology 2019
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society for Imaging Science and Technology