Phong model or phong specular reflection model, Computer Graphics

Phong Model or Phong Specular Reflection Model

It is an empirical model that is not based on physics, although physical observation. Phong observed here for extremely shiny surfaces the specular highlight was minute and the intensity fell off quickly, whereas for duller surfaces this was superior and fell off more slowly. He decided to allow the reflected intensity be a function of (cos θ)n with n >= 200 for a shiny surface and n minute for a dull surface. For an ideal reflector n equals infinity, and for a part of cardboard n equals 0 or 1. In the diagram demonstrated below we can observe how the function (cos θ)n behaves for various values of n. This empirical model for computing the specular reflection range was developed via Phong and therefore termed as PHONG MODEL/ PHONG SPECULAR REFLECTION MODEL. That is the intensity of specular reflection is proportional to cosn a (a lies in between 0° & 90°) consequently cos a varies from 1 to 0. Here 'n' is specular reflection parameter dependent upon the type of surface.

Remember that the Phong illumination equation is simply the Lambert illumination equation along with an additional summand to account for ambient reflection and specular reflection.

Posted Date: 4/5/2013 2:48:25 AM | Location : United States







Related Discussions:- Phong model or phong specular reflection model, Assignment Help, Ask Question on Phong model or phong specular reflection model, Get Answer, Expert's Help, Phong model or phong specular reflection model Discussions

Write discussion on Phong model or phong specular reflection model
Your posts are moderated
Related Questions
what is mean by virtual reality?

Question 1 Write a note on: Audio Spectrum & Audio Waveform Question 2 What is high dynamic range color? Explain gradient color Question 3 Describe Time-Remapping

Geometric continuity - Properties of Bezier Curves Geometric continuity is the other process to join two successive curve sections. G 0 continuity is the similar as parametri

1. Design a bitmap for the English vowels A, E, I, O, U for two different sizes and then implement the bitmaps to plot these vowels on the display. Keep in mind that baseline of al

The table as given below demonstrates possible values of such parameters for classic applications of digital video. Application                  Frame rate                  Dime

Alias Wavefront - Softwares for Computer Animation Alias is one of the highest computer animation packages out there. Alias was formed by the company which used to be Alias, a

Common Principles of Ray Tracing Based upon the nature or attributes of the surface given by the user, the subsequent effects are implemented, as per to rules of optics:  a

Question 1 Describe the process of formation of image in human eye Structure of the Human Eye Image formation in the Eye Brightness Adaptation and Discrimination

Figure uses three dashed arcs and one small circle. Dashed line or arc is a style attribute that can be attached with a line or a curve. In OpenGL you can use the line stipple func

Explain the merits and demerits of Plasma panel display. Advantages: Refreshing is not needed. Produce a very steady image free of Flicker. Less bulky than a CRT.