West Bengal Institute of Technology (WBIT) 2008-6th Sem B.Tech Computer Science and Engineering Computer Science - Computer Graphics & Multimedia - Question Paper
CS/B. Tech(CSE)/SEM-6 /CS-603/08
| ENGINEERING ft MANAGEMENT EXAMDIATIONS JUNS - 3006
COMPUTER GRAPHICS AND MULTIMEDIA
Time : 3 Hours ]
( Pull Marks: 70
GROUP- A (Multiple Choice Type Questions)
Choose the correct alternatives for the following :
1.
10x1-10
1) The amount of memoiy in frame buffer is
0 bit plane b) piano
c) bit d) none of these.
ii) Tablet is
|
a) Logical Interactive Device c) Pbiysical Interactive Device |
b) Data Generation Device ] d) None of these. |
Bresenham's Algorithm seeks to select the optimum raster inw>M<w that represent a
ill)
a) straight line ,
b) curve line
d) none of these.
b) two dimensional
d) none of these.
c) polygon
iv) Clipping algorithms are
a) two or three dimensional c) three dimensional
v) Another name of supersampling is
0 postfiltering b) aliasing
c) anti-aliasing d) none of these.
vl) According to Simple Area Anti-aliasing, pixel is considered as
a) , a mathematical point b) a finite area
c) an infinite area d) none of these.
. , Under a parallel projection, the point ( 2, 3,-1) has been viewed at ( 3, 3, 0 ); then the direction of projection should be the vector
a) (1, 0, 1) b) ( 1, 0, - 1 )
vIH} ' The slope of the Bezier curve at the start of the curve is controlled by
a) first control point b) first two control points
c) first three control points d) all four control points.
ix) How many channels are specified by MIDI standards ?
a) 16 b) 24
c) 32 d) None of these.
x} In which type of compression I-frame is used ?
a) JPEG b) MPEG
* u j G|F d) None of these.
. . GROW-B . ' . . . .
. : ( Shosrt Aamm Type Questions )
i " : ; Answer any three of the following. 3x5=15
2. Write a pseudocode procedure to toipleraent the boundary-flll algorithm in the test in its basic form using the 4-connected definition for region pixels.
3. Magnify the triangle with vertices A ( 0, 0 !, B ( 2, 2 ) and C ( 6, 8 j to twice its size while keeping C ( 5 , 2 ) fixed .
4. What is spline curve ? Describe interpolation and approximation splines.
5. Briefly explain different types of file format used in image compression.
6. Differentiate between spatial redundancy and temporal redundancy.
GROUP-q (Long Answer Type Questions)
Answer any three of the following. 3x15 = 45
7. a) Derive the Midpoint Circle drawing algorithm. 8
b) Given input ellipse parameters rx = 8 and ry = 6, illustrate the steps in the
midpoint ellipse algorithm by determining raster positions along the ellipse path in the 1st quadrant. 7
8. a) Why is a homogeneous co-ordinate system needed in transformation matrix ? 2
b) Derive the transformation matrix for rotation about any axis. 5
c) What do you mean by shearing ? 2
d) Explain the reflection of a 2D figure on y = m x+ c. Derive its component matrix. 6
9. a) Discuss briefly about the Cohen-Sutherland line clipping algorithm. 8
b) Suppose a window has its lowest left comer at ( - 2, - 1 ) and its upper right comer at ( 3, 2 ). Using Cohen-Sutherland algorithm for line clipping, find the
visible portion of the line joining points (-3, 1). 7
- ' ' ' . ' * _ . '
10. a) What do you mean by lossless and lossy compressions ? 2 + 2
b) What do you mean by morphing ? 2
c) What are hypertext and hypermedia ? What is the relation between multimedia, hypertext and hypermedia ? 1 + 1+2
d) What do you mean by I-frame, B-frame and P-frame in the context of video compression? 3
e) What do you mean by mairfdng ? 2
11. a) Find the equation of Bezier curve which passes through points ( 0, 0 ) and
( 2, 1) and is controlled through points ( 7, 5) and (2, 0). 4
b) Explain the term control points. 2
c) Give details of how Bezier curves are generated. Write the pseudocode for generating Bezier curves. 3 + 3
d) What do you mean by hidden surface removal ? 3
END
VI-267033 (3-A)
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Attachment: |
| Earning: Approval pending. |
