lightTransportEquation

lightTransportEquation - Light Transport Equation and...

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Unformatted text preview: Light Transport Equation and Global Illumination Light Transport Equation Equations that describe steady-state of distribution of light in any scene Light Transport Equation Given: light sources geometry of surfaces reflectance characteristics of surfaces What is the value of radiance at all points and along all directions ? The BRDF ( 29 ( 29 ( 29 n , , , , o o i p dE p dL p f i = i o Outgoing Radiance ( 29 ( 29 ( 29 n , , , , o i o p dE p f p dL i = ( 29 ( 29 i dE f dL o i o , = i o o Outgoing Radiance ( 29 = i i dE f o i , i ( 29 ( 29 = o o dL L ( 29 ( 29 = i o o dL L Irradiance and Radiance relation i i i dA d d L cos = Irradiance ( E ) Incoming flux density Radiance ( L ) Incoming flux per unit solid angle per unit projected area dA d dE i i = i i i d dE cos = o Outgoing Radiance i ( 29 ( 29 ( 29 = i d L f L i i i o i o cos , o Outgoing Radiance i ( 29 ( 29 ( 29 ( 29 + = i d L f L L e i i i o i o o cos , Light Transport Equation...
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lightTransportEquation - Light Transport Equation and...

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