MARDALJEVIC, J., BREMBILLA, E. and DROSOU, N., 2015. Illuminance-proxy high dynamic range imaging: a simple method to measure surface reflectance. Presented at: The 28th Session of the International Commission on Illumination (CIE 2015), 28th June-4th July 2015, Manchester.
A technique to measure arbitrarily complex patterns of diffuse surface reflectance under real-world illumination conditions is presented. The technique is founded on high dynamic range (HDR) imaging whereby the luminance values in an HDR image are used to derive average and/or per-pixel values of surface reflectance. Two variants of the method are described and the results
from both are compared with analytical solutions. Whilst the technique has general application for the measurement of reflectance, the authors make the case that there is a pressing need to survey occupied building spaces since the notional/typical reflectance values commonly employed
in simulation for compliance testing may be quite different from those found in real buildings.