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Roll No. .................................. 
Fourth Semester [B.Tech]  May 2005
Paper Code : ETCS – 201 Subject : Computer Graphics and Multimedia 
Time : 3 Hours 
Maximum Marks : 75 
Note : Attempt any 5 questions in all. 
Q1 
( a ) 
Explain the principles of the following input devices in detail:

10 

( b ) 
If a TV screen has 525 scan lines and an aspect ratio of 3:4 and
if each pixel contains 8 bits worth of intensity information, how
many bits per second are required to show 30 frames each second? 
5 
Q2 
( a ) 
Obtain the instance transformation matrix required for deriving
fig. B from fig. A. Fig A is described by three verities A(2,1),
B(4,1), C(3,2) and fig. B is described by vertices A(4,2),
B(2,2), C(3,1). 
8 
( b ) 
Illustrate various techniques of mapping 3D objects on a 2D graphics screen with the help of suitable figure. Also drive the suitable transformation matrices for the same. 
7 
Q3 
( a ) 
What are "viewing transformations"? Differentiate between window
and viewport transformations. 
6 
( b ) 
Explain the working of Zbuffer algorithm. 
6 

( c ) 
Wha is image sampling? 
3 
Q4 
( a ) 
Explain 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 ) 
Explain in brief physical device coordinate system and normalized device coordinate system. 
3 
Q5 
( a ) 
Find the general form of the matrix for reflection about a line
'L' with slope 'm' and y intercept (0,6). 
6 
( b ) 
Describe the working principle of raster refresh display tube. how are different grey levels incorporated in it. 
5 

( c ) 
Give and explain the pseudo code for the basic ray tracing algorithm. 
4 
Q6 
( a ) 
Explain 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 ) 
Define fractals? how are they classified? Give 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 three of the following: 
5 x 3 

( a ) 
Animation techniques 


( b ) 
Color models 


( c ) 
Volume rendering 


( d ) 
Filtering techniques 


( e ) 
Multiparticle systems 
