Slide 8
Slide 8 text
Reflection model
n
Optical reflection on object surface
n
Roughly, it’s modeled as a ratio of outgoing light intensity to
incoming light intensity.
n
Strictly, it’s a ratio of
n
Incoming irradiance (Light energy per unit area, 放射照度)
n
Outgoing radiance (Light energy per unit area and unit solid angle,
放射輝度)
n
Technically, it’s called “BRDF” (bidirectional reflection
distribution function).
Computer Graphics Course @Waseda University 8
𝐸(𝜔!
)
𝐿(𝜔"
)
𝑓 𝜔!, 𝜔" =
𝑑𝐿(𝜔")
𝑑𝐸(𝜔!)
BRDF