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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 Z-buffer 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 ) |
Multi-particle systems |
|