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:

Note:

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
Depth-buffer (or z-buffer) Method  Z-buffer method is a fast and easy technique for specifying visible-surfaces. Z-buffer method is also termed to as the z-buffer method, as

Graphics Tablet - CAD and CAM We need to know what we mean via tablet in computer terminology, before going into details on the graphic tablet, since in the other disciplines

Scan conversion: For display of a continuously defined object, a method to map a continuous abstract object or shape into a discrete plane of computer display is needed.  This

File Formats that are used for Bitmap Data Bitmap data can be saved in a wide variety of file formats are: • BMP: restricted file format that is not appropriate for use in

Parallel Projection In parallel projection, objects in scene are projected onto the 2D view plane along rays parallel to a projection vector. Parallel projection is orthogra

BlackJack is a popular card game played in many casinos. The player plays against the dealer aiming to reach 21 points, or a score higher than the dealer without exceeding 21. The

Projections When all display devices are 2D, you need to devise methods that give a realistic view of a 3D scene onto 2D display. With more and more devices coming in the marke

Concept Of Hyper Text And Hyper Media:- Any student, who has utilized online assist for gaming etc, will previously be familiar along with a basic component of the Web-Hypertext.Hy

Computer Animation Tools  To create various types of animation discussed above, we want to have particular software and hardware as well. Here, the fundamental constraint is re

Define clipping and covering (exterior clipping)? Clipping is the process of cutting a graphics display to neatly fit a predefined graphics region or the view port.  This is