Phong specular reflection model or specular reflection, Computer Graphics

Phong Specular Reflection Model or Specular Reflection

This model of local illumination is frequently termed as the Phong specular reflection model. Here we discuss the matter of specular reflection in a more practical manner. See the figure 9 where if R is the ways of specular reflection and V is the ways of the viewer as assigned at the View Reference Point or VRP, then for a perfect reflector the specular reflection is visible merely while V and R coincide. For actual objects as not ideal reflectors the specular reflectance can be seen even if V and R don't coincide, that is observable over range of values or a cone of values. The shinier the surface, the minor the f(α) range for specular visibility. Thus a specular reflectance model should have maximum intensity at R, along with an intensity that decreases like f (α).

516_Phong Specular Reflection Model or Specular Reflection.png

From the above discussion we found that Specular reflection is the consequence of total or near whole reflection of the light in a concentrated region near the specular reflection angle as a and the description of other variables demonstrated in the figure 8 as:


N        → Unit normal surface vector

R         → Unit vector in the direction of ideal specular reflection

L         → Unit vector in the direction of pt. Light source

V         → Unit vector pointing the viewer.

a          → viewing angle relative to R .

- At a = 0 viewer will observe light of more intensity.

- In case of perfect reflection or ideal mirror, incident light is reflected merely in specular reflection direction.

- Objects the other than perfect reflection exhibit specular reflection over a finite range of viewing positions nearby R as shiny surfaces have narrow specular reflection range and dull surfaces have broad range.

Posted Date: 4/5/2013 2:47:40 AM | Location : United States

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

Write discussion on Phong specular reflection model or specular reflection
Your posts are moderated
Related Questions
Architecture: One of the purposes for the development of virtual reality (that is in fact a form of computer animation) was which it was going to be very helpful to architects. He

Assume here are three polygon surfaces P,Q, R along with vertices specified by as: P: P1(1,1,1), P2(4,5,2), P3(5,2,5) And as Q: Q1(2,2,0.5), Q2(3,3,1.75), Q3(6,1,0.5) R: R1(0.5,

Explain depth buffer method

GRAPHICS: It is one of the core elements of any multimedia application. We all have heard a well-known saying as "one picture conveys a message of 1000 words", hence without

1. By using Digital Differential Analyzer algorithm draw line segments from point (1,1) to (9,7). Ans. We see that the usual equation of the line is specified by: y = mx+c

Types of Bitmap Images Bitmap images can include any number of colours but we distinguish among four main categories as: 1)      Line-art: These are images that include

Question 1 Discuss the overview of multimedia networks Question 2 Discuss the types of synchronization in multimedia system >> Basic synchronization issues Content R

Ambient Reflection-Polygon Rendering & Ray Tracing Methods When we go for the examiner of light effects, so surroundings play a significant role and it is assumed as there

determine the tranformation matrix for reflection,computer graphics

(a) Differentiate between the following compression algorithm: 1. Shannon -Fano Algorithm and 2. Huffman Encoding (b) A statistical encoding algorithm is being considered