DOEACC Society 2006 DOEACC B Level B4.4 Computer Graphics & Multimedia Systems ( ) - Question Paper

B4.4-R3: COMPUTER GRAPHICS & MULTIMEDIA SYSTEMS
NOTE:
Time: three Hours Total Marks: 100
1.
a) What is the difference ranging from raster-scan CRT and random-access CRT?
b) What is the relationship ranging from the translations Ttx,ty , T-tx, -ty and (T tx, ty )-1 ?
c) discuss the Z-buffer algorithm for removing hidden surfaces.
d) discuss 1 vanishing point projection from a point on z-axis.
e) What do you mean by digital audio? Synchronization of audio and video streams is
important for multimedia communication. Why?
f) define the transformation ML that reflects an object about a line L.
g) discuss the special visual effect morphing in graphics animation.
(7x4)
2.
a) Indicate which raster locations would be chosen by Bresenham's algorithm when scan
converting a line from screen coordinate (1,1) to screen coordinate (8,5).
b) Perform a 45° rotation of triangle A(0,0), B(1,1) and C(5,2) about P(-1,-1)
c) discuss the difference ranging from the perspective projection and the parallel projection.
(6+6+6)
3.
a) discuss the technology of CCD cameras.
b) discuss the steps of the Cyrus-Beck line-clipping algorithm.
c) Let R be the rectangular window whose lower left-hand corner is at L(-3,1) & upper righthand
corner is at R(2,6). Clip the line segments AB and CD where A(-4,2),B(-1,7),C(-1,5)
and D(3,8).
(6+6+6)
4.
a) What is the difference ranging from Gº and Cº continuity? discuss the difference ranging from Cº,
C1, C2 continuity. Suggest a scheme for approximating a set of 2D points using a curve
that satisfies C2 continuity.
b) Briefly define the Phong Shading model.
([3+3+6]+6)
5.
a) What kind of coding is JPEG, in the coding classification? Which part of the JPEG
algorithm introduces losses and why?
b) Is it necessary to calculate lighting info before clipping for rendering a 3D scene?
Explain.
c) What is a MIDI file?
B4.4-R3 Page one of two July, 2006
1. ans ques. one and any 4 ques. from two to 7.
2. Parts of the identical ques. should be answered together and in the identical
sequence.
(9+6+3)
B4.4-R3 Page two of two July, 2006
6.
a) discuss the Z-buffer algorithm for removing hidden surfaces.
b) Explain, how temporal redundancy is exploited in compression of video in MPEG-1.
(9+9)
7. Write short notes on any 2 of the following:
a) MPEG
b) Gourand Shading
c) kinds of Multimedia Authoring Systems
(2x9)
B4.4-R3 Page three of two July, 2006

Earning:   Approval pending.