Phong reflection model

E944314

computer graphics technique local illumination model shading model

The Phong reflection model is a computer graphics shading technique that approximates how light reflects off a surface by combining ambient, diffuse, and specular components to produce smooth highlights.

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Observed surface forms (1)

Surface form	Occurrences
Phong shading	1

Statements (49)

Predicate	Object
instanceOf	computer graphics technique ⓘ local illumination model ⓘ shading model ⓘ
advantage	computational simplicity ⓘ visually smooth specular highlights ⓘ
ambientTermDependsOn	ambient light intensity ⓘ
appliedIn	interactive 3D applications ⓘ real-time rendering ⓘ video games ⓘ
approximationOf	Lambertian diffuse reflection ⓘ specular highlights ⓘ
assumes	point light sources ⓘ view-dependent specular reflection ⓘ
basedOn	empirical approximation of reflection ⓘ
component	ambient reflection component ⓘ diffuse reflection component ⓘ specular reflection component ⓘ
diffuseTermDependsOn	cosine of angle between light and normal ⓘ
field	3D rendering ⓘ computer graphics ⓘ
hasParameter	ambient reflection coefficient ⓘ diffuse reflection coefficient ⓘ shininess exponent ⓘ specular reflection coefficient ⓘ
ignores	global illumination effects ⓘ interreflections between surfaces ⓘ subsurface scattering ⓘ
illuminationType	local illumination ⓘ per-fragment illumination ⓘ
influenced	development of later reflection models ⓘ
introducedBy	Bui Tuong Phong NERFINISHED ⓘ
introducedIn	1973 ⓘ
limitation	physically inaccurate energy conservation ⓘ view-dependent artifacts for extreme angles ⓘ
mathematicalForm	sum of ambient, diffuse, and specular terms ⓘ
namedAfter	Bui Tuong Phong NERFINISHED ⓘ
publishedIn	"Illumination for Computer Generated Pictures" NERFINISHED ⓘ Communications of the ACM NERFINISHED ⓘ
relatedTo	Blinn–Phong reflection model NERFINISHED ⓘ Gouraud shading NERFINISHED ⓘ Phong shading NERFINISHED ⓘ
specularTermDependsOn	cosine of angle between view and reflection raised to shininess exponent ⓘ
usedFor	approximating light reflection on surfaces ⓘ producing smooth highlights ⓘ shading 3D objects ⓘ
usesVector	light direction vector ⓘ reflection direction vector ⓘ surface normal vector ⓘ view direction vector ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Lambertian reflectance law in optics → contrastWith → Phong reflection model ⓘ

subject surface form: Lambertian reflectance law

Henri Gouraud → precedes → Phong reflection model ⓘ

subject surface form: Gouraud shading

this entity surface form: Phong shading