On the Computation of Equivalent Sphere Illumination
- 1 January 1975
- journal article
- research article
- Published by Taylor & Francis in Journal of the Illuminating Engineering Society
- Vol. 4 (2) , 129-149
- https://doi.org/10.1080/00994480.1975.10748501
Abstract
Equivalent sphere illumination (ESI) can be calculated by an efficient technique that will make computation for many target locations in a room practical. The technique can be easily coded into a computer program, and results will be provided much faster than programs based on other computational techniques. Computations for the background and task luminance of a target are separated into two components: Part I of this paper considers the calculation of the direct components (the Appendices give a specific algorithm for their computation); Part II considers the computation of the reflected components.Keywords
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