Simplified BRDF of a non-Lambertian diffuse surface

Earp, A; Smith, G; Franklin, J

Simplified BRDF of a non-Lambertian diffuse surface

Earp, A Smith, G

Franklin, J

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Publication Type:: Journal Article
Citation:: Lighting Research and Technology, 2007, 39 (3), pp. 265 - 281
Issue Date:: 2007-10-11

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Field	Value	Language
dc.contributor.author	Earp, A	en_US
dc.contributor.author	Smith, G https://orcid.org/0000-0002-6985-2880	en_US
dc.contributor.author	Franklin, J	en_US
dc.date.issued	2007-10-11	en_US
dc.identifier.citation	Lighting Research and Technology, 2007, 39 (3), pp. 265 - 281	en_US
dc.identifier.issn	1477-1535	en_US
dc.identifier.uri	http://hdl.handle.net/10453/4195
dc.description.abstract	For real diffuse surfaces, the bi-directional reflectance distribution function (BRDF) is non-Lambertian, and may require a more complex model in ray tracing simulations. The BRDF of a diffuse white surface is studied at multiple angles of incidence, and an additional reflectance component is observed, which becomes more specular as the angle of incidence increases. For angles of incidence >85°, the BRDF may be regarded as specular. In this article, a two-part model is proposed in which the BRDF of a diffuse surface consists of a Lambertian diffuse component and a Lorentzian pseudo-specular component - both of which vary with angle of incidence. This model may be used to reduce computation times for ray tracing simulations, as an alternative to large three-dimensional BRDF datasets. © The Chartered Institution of Building Services Engineers 2007.	en_US
dc.relation.ispartof	Lighting Research and Technology	en_US
dc.relation.isbasedon	10.1177/1477153507080512	en_US
dc.subject.classification	Building & Construction	en_US
dc.title	Simplified BRDF of a non-Lambertian diffuse surface	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	39	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1201 Architecture	en_US
dc.location.activity	ISI:000250076800005	en_US
dc.location.activity	Phuket, Thailand
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	39	en_US

Abstract:

For real diffuse surfaces, the bi-directional reflectance distribution function (BRDF) is non-Lambertian, and may require a more complex model in ray tracing simulations. The BRDF of a diffuse white surface is studied at multiple angles of incidence, and an additional reflectance component is observed, which becomes more specular as the angle of incidence increases. For angles of incidence >85°, the BRDF may be regarded as specular. In this article, a two-part model is proposed in which the BRDF of a diffuse surface consists of a Lambertian diffuse component and a Lorentzian pseudo-specular component - both of which vary with angle of incidence. This model may be used to reduce computation times for ray tracing simulations, as an alternative to large three-dimensional BRDF datasets. © The Chartered Institution of Building Services Engineers 2007.

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http://hdl.handle.net/10453/4195