posted on 2023-04-21, 08:58authored byJohn Mardaljevic, Eleonora Brembilla, Stephen Cannon-Brookes, Nigel Blades
Illumination levels in historic buildings need to be monitored for conservation purposes, especially in daylit spaces which are invariably subject to large spatio-temporal variations in light levels. However, light meters record only at a single point, and numbers are limited. A recently demonstrated image-based technique using digital cameras to measure indirectly the prevailing daylight illumination in spaces is extended. As a prerequisite, the technique requires a reflection map of the 'target' - here, a historic tapestry. Acquiring this without disturbance to the scene required a novel combination of in-situ measurement and lighting simulation. How this was achieved is described in the paper.
Funding
National Trust (UK)
History
School
Architecture, Building and Civil Engineering
Published in
Proceedings of Building Simulation 2021: 17th Conference of IBPSA
Pages
2319 - 2326
Source
Building Simulation 2021: 17th Conference of IBPSA
Publisher
International Building Performance Simulation Association (IBPSA)
This paper was published in the Proceedings of Building Simulation 2021: 17th Conference of IBPSA. This paper is available at https://doi.org/10.26868/25222708.2021.30339 and is reproduced here with the permission of the publisher.