Characterization of a quasi-real-time lighting computing system based on HDR imaging

In this paper we present the characterization of a calibrated embedded system for quasi real-time lighting computation based on HDR sky monitoring. To quantify its accuracy in lighting computation, we positioned the device in front of a test module with unilateral-façades to measure the luminance di...

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Bibliographic Details
Published inEnergy procedia Vol. 122; pp. 649 - 654
Main Authors Wu, Yujie, Këmpf, Jérôme Henri, Scartezzini, Jean-Louis
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2017
Subjects
Embedded system
FPGA
Horizontal illuminance
Lighting simulation
Real-time
Embedded system
FPGA
Lighting simulation
Real-time
Horizontal illuminance
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Summary:In this paper we present the characterization of a calibrated embedded system for quasi real-time lighting computation based on HDR sky monitoring. To quantify its accuracy in lighting computation, we positioned the device in front of a test module with unilateral-façades to measure the luminance distribution of the sky and ground dome, including that of the sun, the clouds and landscape, followed by on-board illuminance computation in the device. An experiment was conducted on two representative days, with overcast and clear sky respectively. The embedded device computed the illuminance for 5 virtual sensors which was referred to the measurement by 5 lux-meters at the identical positions synchronously to assess its relative error. Compared with the Perez all-weather sky model, the embedded device was indicated to be more reliable and achieved 10%-25% higher accuracy in transient lighting computation of horizontal illuminance based on HDR imaging and luminance mapping.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2017.07.364