Bidirectional scattering distribution function: Difference between revisions

Revision as of 11:29, 14 July 2014

Revision as of 06:56, 16 July 2014

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The definition of the '''BSDF''' ('''Bidirectional scattering distribution function''') is not well standardized. The term was probably introduced in 1980 by Bartell, Dereniak, and Wolfe.<ref name=bartell1980>{{cite web

|last1=Bartell

|first1=F. O.

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|publisher=Proceedings of SPIE Vol. 257 Radiation Scattering in Optical Systems

|accessdate=14 July 2014

|pages=154-160154–160

|doi=10.1117/12.959611

|year=1980}}

</ref>. Most often it is used to name the general mathematical function which describes the way in which the light is scattered by a surface. However in practice this phenomenon is usually split into the reflected and transmitted components, which are then treated separately as '''BRDF''' ('''[[Bidirectional reflectance distribution function]]''') and '''BTDF''' ('''Bidirectional transmittance distribution function''').

[[Image:BSDF05 800.png|thumb|right|280px|BSDF: BRDF + BTDF]]

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|publisher=Proceedings of ACM SIGGRAPH 2001

|accessdate=14 July 2014

|pages=511-518511–518

|doi=10.1145/383259.383319

|year=2001}}</ref> describes the relation between outgoing radiance and the incident flux, including the phenomena like [[subsurface scattering]] (SSS). The BSSRDF describes how light is transported between any two rays that hit a surface.