Spectral tuning of luminance cameras: a theoretical model and validation measurements

Thijs Kruisselbrink (Corresponding author), Rajendra Dangol, Alexander Rosemann, Evert van Loenen

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
33 Downloads (Pure)

Abstract

Presently, luminance distribution measurement devices, using High Dynamic Range technology, are increasingly used as they provide a lot of relevant data related to the lit environment at once. However, the accuracy of these devices can be a concern. It is expected that the accuracy would be improved by incorporating the effect of the camera spectral responsivity and the spectral power distribution of the illuminant under which the measurements are conducted. This study introduces two optimization criteria incorporating these aspects to improve the spectral match and the performance of luminance distribution measurement devices. Both criteria are tested in a theoretical model and in practical measurements using two cameras and three illuminants: LED, halogen and fluorescent. Both methodologies support the hypothesis that the conventional method to determine the luminance introduces spectral mismatches that can be limited by optimizing relative to the spectral responsivity of the camera. Additionally, substantial evidence was found, by both the theoretical model and the validation measurements, that the spectral power distribution of the illuminant also has an effect on the performance.

Original languageEnglish
Pages (from-to)654-674
Number of pages21
JournalLighting Research and Technology
Volume52
Issue number5
Early online date9 Oct 2019
DOIs
Publication statusPublished - 1 Aug 2020

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