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Hong Kong University of Science & Technology Department of Electrical & Electronic Engineering
ELEC 360: Digital Media & Multimedia Applications
Fall 2002
Name: _______________________________ Student ID: ___________________________ E-mail: ______________________________
Quiz #2B (14th November, 2002)
1. If figure 1 is the starting key frame of an animation sequence, which of the following picture is the least likely ending key frame?
Figure 1: Starting key frame of the animation sequence
a)
b) c) d) e)
2.
Name a 2D animation transition that is usually NOT applicable (or visually unpleasant) between figure 1 (as the starting key frame) and the picture you choose in Question 1 (as the ending key frame of the animation sequence).
3.
What is the primary role of the TCP layer in the TCP/IP data network?
4.
In a corporate internet environment, it is common not to allow any web browser to `surf the internet directly. An intermediate agent called `proxy server is used as shown in the following figure. Name one of the inconveniences of using the `proxyserver.
5.
XHTML is essentially a reformulation of HTML 4.0 as an application of XML. In XML, its syntax, or loosely speaking, its gramma r, is tightly enforced. As such, all the bad habits or invalid syntax (so called ill-formed HTML) are no longer tolerated. In the following ill-formed HTML body, name one ill-formed aspect.
<body bgcolor = #fffff0>
<p>
This is the first paragraph
<p>
This is the second paragraph
<i> This <b> is the </i> third </b> paragraph
6. Which one of the following languages belongs to SGML?
a.
Java
b.
SVG
c.
C#
d.
Perl
e.
Visual Basic
7.
What is the difference between the HTTP `POST and `GET request?
8.
Which 3D transformations (maybe more than one) does the following matrix operation represent?
.
cos(q )0 sin(q )0
-
.
Y Y
. . . .o
0 9 0 0
)sin( Yq 0 )cos( Yq 0 . . . .
0 0 0 .1
a.
Scaling
b.
Bending
c.
Translation
d.
Rotation about the y-axis
e.
Rotation about the z-axis
9.
For the perfect diffuse reflection of light off a perfect matte surface, what is the general relationship in terms of angle of incidence and angle of reflection (or scattering) between the incident and reflected light?
10.
Image compression generally makes use of a spatial transformation and some statistical coding technique. In JPEG, DCT (discrete cosine transform) and Huffman coding are used respectively. What kind of spatial transformation and statistical coding technique are used in JPEG2000 compression?
11.
Given a point object (i.e. a single point with no width, height or depth) at (-1,0,0) in the world co-ordinate system (WCS), write down the matrix transformations which would animate the point object to follow the temporal trajectory as shown in the following figure. You can as