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Lewis, J. Owen
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Lewis, J. Owen
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Lewis, J. Owen
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Whole-Sky Luminance Maps from Calibrated Digital Photography
2006, Kenny, Paul, Olley, John A., Lewis, J. Owen
Sky luminance is an essential component in assessing the appearance and performance of
internal spaces which are highly sensitive to the often dynamic luminance of the visible sector
of the sky. Therefore, whole sky luminance distributions representative of real-sky sectoral
dynamics over short time intervals are required. A modified scientific-grade digital camera
was used to measure whole-sky luminance distributions of various sky conditions. Results
showed acceptable correlation between the measured and calculated results for overcast and
clear skies demonstrating the viability of using hemispherical digital photography for
mapping whole-sky luminance distributions. However, intermediate skies showed distinct
sectoral variations and dynamics supporting the argument for more accurate and
respresentative luminance distribution data.