Light diffuseness metric, Part 1

Theory

Journal Article (2017)
Author(s)

Ling Xia (TU Delft - Human Technology Relations)

SC Pont (TU Delft - Human Technology Relations)

I.E.J.R. Heynderickx (Eindhoven University of Technology)

Research Group
Human Technology Relations
DOI related publication
https://doi.org/10.1177/1477153516631391
More Info
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Publication Year
2017
Language
English
Research Group
Human Technology Relations
Issue number
4
Volume number
49
Pages (from-to)
411-427

Abstract

The light density, direction and diffuseness are important indicators of the spatial and form-giving character of light. Mury presented a method to describe, measure and visualise the light field’s structure in terms of light density and direction variations in three-dimensional spaces. We extend this work with a theoretical and empirical review of four diffuseness metrics leading to a novel metric proposal DXia. In particular, the relationships between these diffuseness metrics were studied using a model named ‘probe in a sphere’. Diffuseness metric DXia re-frames the diffuseness metric of Cuttle in an integral description of the light field. It fulfils all diffuseness criteria and has the advantage that it can be used in a global, integrated description of the light flow and diffuseness throughout three-dimensional spaces.

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