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
How to utilize illumination model to calculate vertex intensity: For such we interpolate intensities beside the polygon edges, for all scan line the intensity at the intersecti

Explain the working of Animators Animators want to create a human image that moves and interacts with its background in such a way that viewers can't tell if a specific scene i

How many 128 x 8 RAM chips are needed to provide a memory capacity of 4096 16 bits?

what is region filling? give details

3DStudio Max -Softwares for computer animation The successor to 3-DStudio 3.0, 3-DStudio Max runs in WindowsNT. This is completely object-oriented, featuring new enhancements a

what is staircase appearance

limitationsof dda

Reflection about a Line - 2-D and 3-D Transformations Reflection is a transformation that produces the mirror image of an object. Since we discussed that the mirror reflection

Parameterized Systems - Computer Animation Parameterized Systems is the systems which permit objects motion features to be given as part of the object descriptions. The adjus

QUESTION a) Explain with the help of a diagram, how a thermal inkjet printer works. b) Briefly explain the term density range. c) Distinguish between scaling and resampli