Guru Gobind Singh Indraprastha Vishwavidyalaya 2005 B.E Computer Science Computer Graphics and Multimedia - Question Paper

End-Term exam

Fourth 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 )
Explain 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 )
Explain 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 )
Describe the working principle of raster refresh display tube. how are various grey levels incorporated in it.

5

( c )
Give 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:


5 x 3

( a )


Animation techniques


( b )


Color models


( c )


quantity rendering


( d )


Filtering techniques


( e )


Multi-particle systems

Earning:   Approval pending.