illumination model Flashcards
Name three components of illumination models
Ambient Light
Diffuse Illumination
Specular illumination
Object Illumination using following properties:
Intensity of Ambient Light
Type of Object surface
Surface color
illumination model in computer graphics used to
show reflection of objects
Illumination Model can be diversified into
Local illumination model
Global Illumination model
from where does illumination model get its light
Direct light source
light which is reflected from near by objects
illumination models try to capture reality of scenes and make it possible
False
What does RLV denote in illumination model?
R represents the unit vector in the direction of specular reflection L – unit vector directed toward the point light source V – unit vector pointing to the viewer from the surface position
What does angle phi denote?
Angle is the viewing angle relative to the
specular- reflection direction R
Quick Question:
what is the type of light below:
A surface that is not exposed to direct light
may still be lit up by reflections from other
nearby objects –
Ambient light
Diffuse Reflection/Prefect diffuse Reflection
Surfaces that are rough or grainy tend to reflect light in all directions,This scattered light is called diffuse reflection
Surfaces that reflect incident light with equal intensity in all directions,These surfaces are called
ideal diffuse reflectors
examples of Diffuse reflections are:
snow,movie screen
what type of surface appears equally bright from all viewing directions.
Lambertian Surface
In Specular reflection it may possible that some portion of surface
generated more light or may produce bright spot.
This is called
specular reflection
examples of specular reflection
Metal Surfaces Mirror Shiny plastic Gold and silver coated surfaces Shiny apple surfaces
