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# 2005 Guru Gobind Singh Indraprastha University B.E Computer Science Computer Graphics and Multimedia Question paper

University Question Papers
2005 Guru Gobind Singh Indraprastha University B.E Computer Science Computer Graphics and Multimedia Question paper
End-Term Examination

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:
(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 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

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