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1. B.Tech VI Semester ( Main/ Back ) Examination, May-June 2015
Computer Science
6CS4A Computer Graphics and Multirnedia Techniques
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Time : 3 Hours Maximum Marks : 80
Min. Passing Marks : 24
Instructions to Candidates :
Attempt any Five questions, selecting one question from each unit. All
questions carry equal marks. (Schematic diagrams must be shown wherever
necessary. any data you feel missing suitably be assumed and stated clearly.)
Units of quantities used/ calculated must be stated clearly.
UNIT - I
1. a) What is scan conversion ? Explain Raster Scan system with the help of Block
diagram?
b) Explain Basic principle to draw a circle also Explain mid-point circle Algorithm?
(8)
(oR)
1. a) Write short note on :Anti aliasing technique?
b) Explain the interactive picture construction technique?
(8)
(8)
(8)
(8)
2. a)
b)
UNIT.II
Explain Cohen-sutherland line clipping Algorithm with region code details?
(8)
What do you mean by homogeneous co-ordinates? How these co-ordinates
are useful in transformation?
6E 6024nors (1) [Contd....

2. (on1
2. a) What is the difference between scaling and R.otation?
b) Write down flood fillAlgorithm forArea filling?
iii) Ray-TracingAlgorithm
b) Discuss about the difference between CNIY and RGB color?
. UNIT.III
3. a) Explain Depth-BufferAlgorithm to display visible surfaces ofpolygen? (8)
b) Short - Note on :
1) B-Spline curves
ii) Bezier Curve (4x2:8)
(oR)
a) Explain Scan lineAlgorithm? (8)
b) What is perspective representation? Explain various types of perspective
projection? (8)
UNIT - IV
a) Write a shortNote on the following
1) Gaurand shading
ii) Phong shading
3.
4.
(8)
(8)
(4x3=12)
(4)
(oR)
4. What are diffused and specular reflection? and write down the illumination model
that incorporates both these reflections erplain all the variables used in this model?
(16)
6B 6024 (2)

3. UNIT . V
5. a) What are Multimedia authoring tools? (S)
b) Explain the different types of data compression technology? (8)
(oR)
5. Write a short Note on :
D Animationtechniques
ii) Architectural and telecommunication considerations. (8x2=16)
6E 6A24 (3)