A Review of Illuminance Mapping Practices from HDR Images and Suggestions for Exterior Measurements

ABSTRACT

High Dynamic Range (HDR) imaging has traditionally been used to create photorealistic images by combining multiple Low Dynamic Range (LDR) images. The application of HDR imaging has been since expanded to study the lighting environment by extraction of metrics such as luminance, illuminance, and glare. While luminance mapping of HDR images has been extensively studied in the recent past, research on illuminance mapping has been limited because of its strong dependency on surface materiality. This document reviews recent research on HDR techniques as it pertains to illuminance measurement and describes results of a pilot study comparing illuminance values captured and calculated using HDR against illuminance measurements collected with a calibrated illuminance meter, from a turf-based surface.

KEYWORDS:

• Lighting metrology
• high dynamic range imaging
• illuminance

Disclosure statement

The authors declare that they have no financial competing interests.

Additional information

Funding

This work was supported by the College of Engineering Research Seed Grant Program administered by the College of Engineering, Lawrence Technological University. The primary (first) author was the recipient of the grant.