Guru Gobind Singh Indraprastha Vishwavidyalaya 2005-4th Sem B.Tech [] - , Code : ETCS – 201 Subject : Computer Graphics and Multimedia - Question Paper

End-Term exam
4th Semester [B.Tech] - May 2005

Paper Code : ETCS – 201 Subject : Computer Graphics and Multimedia

Time : three Hours
Maximum Marks : 75

Note : Attempt any five ques. in all.


Q1
( a )
discuss the principles of the subsequent input devices in detail:

(i) mouse (ii) tablets (iii) light pen



10

( b )
If a TV screen has 525 scan lines and an aspect ratio of 3:4 and if every pixel contains eight bits worth of intensity information, how many bits per 2nd are needed to show 30 frames every second?

5



Q2
( a )
find the instance transformation matrix needed for deriving fig. B from fig. A. Fig A is defined by 3 verities A(2,1), B(4,1), C(3,2) and fig. B is defined by vertices A(-4,-2), B(-2,-2), C(-3,-1).

8

( b )
Illustrate different techniques of mapping 3D objects on a 2D graphics screen with the help of suitable figure. Also drive the suitable transformation matrices for the identical. 7



Q3
( a )
elaborate "viewing transformations"? Differentiate ranging from window and viewport transformations.

6

( b )
discuss the working of Z-buffer algorithm. 6

( c )
Wha is image sampling? 3



Q4
( a )
discuss the working of Sutherland Hodgman algorithm for polygon clipping with the help of a suitable example.

6

( b )
Generate a line y=2x + 10 using Bressenham's line generation algorithm.

6

( c )
discuss in brief physical device coordinate system and normalized device coordinate system. 3



Q5
( a )
obtain the general form of the matrix for reflection about a line 'L' with slope 'm' and y intercept (0,6).

6

( b )
define the working principle of raster refresh display tube. how are various grey levels incorporated in it. 5

( c )
provide and discuss the pseudo code for the basic ray tracing algorithm. 4



Q6
( a )
discuss the basic characteristics of light in terms of luminance, hue and saturation. Also develop Phong's model for reflection of light from object surfaces to the user's eye.

6

( b )
describe fractals? how are they classified? provide the methodology for subdividing the objects with Euclidian dimensions.

5

( c )
Compare and contrast the TIFF file formats, with the RIFF formats. 4



Q7

Write short notes on any 3 of the following:

five x 3

( a )
Animation techniques



( b )
Color models



( c )
quantity rendering



( d )
Filtering techniques



( e )
Multi-particle systems

Earning:   Approval pending.