Image precision and object precision, Computer Graphics

Q. What do you mean by image precision and object precision? Describe z- buffer algorithm for visible surface detection.

OR

What do you mean by image precision and object precision?

Ans. Visible- surface detection algorithms are broadly classified according to whether they deal with object definitions directly or with their projection images. These two approaches are called object- space methods of object precision and image- space methods or image precision respectively. An object space method compares objects and parts of objects to each other within the scene definition to determine which surface, as a whole, we should label as visible. In an image- space algorithm, visibility is decided point by point at each pixel position on the projection plane. Most visible- surface algorithm use image- space methods, although object- space methods can be used effectively to locate visible surface in some cases. Line- display algorithms, on the other hand, generally use object- space methods to identify visible lines in wireframe displays, but many image- space visible- surface algorithm can be adapted easily to visible- line detection.

 

 

Posted Date: 7/12/2012 6:42:36 AM | Location : United States







Related Discussions:- Image precision and object precision, Assignment Help, Ask Question on Image precision and object precision, Get Answer, Expert's Help, Image precision and object precision Discussions

Write discussion on Image precision and object precision
Your posts are moderated
Related Questions
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

Question : (a) List and describe important aspects to take into consideration when looking at paper for print. (b) Describe clearly the meaning of the following words: I.

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

Put the system of a geometric data table for a 3d rectangle. Solution : Vertex Table Edge Table Polygon Surface Table

what is ray tracing algorithm in hidden surface removal

What is surface patch?  A single surface element can be explained as the surface traced out as two parameters (u, v) take all possible values between 0 and 1 in a two-parameter

Three Dimensional Transformations A 3D geometric transformation is used extensively in object modelling and rendering.2D transformations are naturally extended to 3D situations

What is the advantages and disadvantages of reflection ?


Can you list at least three important applications of computer graphics? There are lots of interesting applications of computer graphics. Three common applications are compute