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Light diffuseness metric, Part 2: Describing, measuring and visualising the light flow and diffuseness in three-dimensional spaces.

Authors :
Xia, L.
Pont, S. C.
Heynderickx, I.
Source :
Lighting Research & Technology. Jun2017, Vol. 49 Issue 4, p428-445. 18p. 1 Color Photograph, 1 Black and White Photograph, 2 Diagrams, 1 Chart, 7 Graphs.
Publication Year :
2017

Abstract

We introduce a way to simultaneously measure the light density, light vector and diffuseness of the light field using a cubic illumination meter based on the spherical harmonics representation of the light field. This approach was applied to six light probe images of natural scenes and four real scenes built in our laboratory, and the results were compared to those obtained using Cuttle’s method. We also demonstrated a way to simultaneously and intuitively visualise the global structure of the light distribution using light tubes and colour coding for the light density, light flow and diffuseness variations through the space. Together with Mury’s work, we have a complete way to describe, measure and visualise the local and global low-order properties of light distributions in three-dimensional spaces. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14771535
Volume :
49
Issue :
4
Database :
Academic Search Index
Journal :
Lighting Research & Technology
Publication Type :
Academic Journal
Accession number :
123220269
Full Text :
https://doi.org/10.1177/1477153516631392