Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On the calibration of high dynamic range photography for luminance measurements in indoor daylit scenes
This article describes a study of two issues concerning the calibration of high dynamic range (HDR) photography for luminance measurements in indoor daylit spaces: (i) the selection of a target in a scene for calibration and (ii) the variation of the calibration factor with different daylight levels. Luminance measurements of coloured and grey targets were conducted in a classroom under stable sky conditions using a calibrated luminance meter and HDR photography. Comparisons between luminance values measured by HDR photography and the spot luminance meter were carried out. This study affirms the findings of a previous study that grey targets are more suitable for use in the calibration of HDR photography for luminance measurements. Using a grey surface of 18% reflectance, the ratio between luminances obtained by the two methods, regarded as the calibration factor, was computed. It was found that there was a weak and insignificant correlation between calibration factor and daylight levels within the range of investigation in this study.
On the calibration of high dynamic range photography for luminance measurements in indoor daylit scenes
This article describes a study of two issues concerning the calibration of high dynamic range (HDR) photography for luminance measurements in indoor daylit spaces: (i) the selection of a target in a scene for calibration and (ii) the variation of the calibration factor with different daylight levels. Luminance measurements of coloured and grey targets were conducted in a classroom under stable sky conditions using a calibrated luminance meter and HDR photography. Comparisons between luminance values measured by HDR photography and the spot luminance meter were carried out. This study affirms the findings of a previous study that grey targets are more suitable for use in the calibration of HDR photography for luminance measurements. Using a grey surface of 18% reflectance, the ratio between luminances obtained by the two methods, regarded as the calibration factor, was computed. It was found that there was a weak and insignificant correlation between calibration factor and daylight levels within the range of investigation in this study.
On the calibration of high dynamic range photography for luminance measurements in indoor daylit scenes
Ng, Roger T. H. (Autor:in) / Chung, Tse-ming (Autor:in)
Architectural Science Review ; 54 ; 39-49
01.02.2011
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
| British Library Online Contents | 2011
SKY LUMINANCE DISTRIBUTION MODEL FOR SIMULATIONOF DAYLIT ENVIRONMENT
| British Library Conference Proceedings | 1999
The Luminance Differences index: a new indicator of user preferences in daylit spaces
| British Library Online Contents | 2002
The Luminance Differences index: a new indicator of user preferences in daylit spaces
| British Library Online Contents | 2002