ITEC2110 Spring 2011 Test3, Dr. Jim Rowan
Images used in this test are found in the folder named: test3Images.
1) In the recent movie Avatar what technique was used to create an animated, fictional
creature that moves and looks very much like the actor portraying the part?
2) While virtual reality creates an entire 3D, computer generated world that completely
blocks out the existing world, another form merely adds computer-based information on
top of the real world. What is this called?
3) Digital TV recently replaced Analog broadcast TV. Give one reason for this change.
4) The fusion rate for humans is around 40 frames per second. What does this mean?
5) What affects this fusion rate making it either larger or smaller?
6) What is the difference between interlaced video and progressive scan video?
7) What is the name given to the effect that arises from the use of interlaced scan video to
film rapidly moving objects?
8) Of the images seen in the test3Images folder, which one(s) show the effect named in
the above question?
9) Looking at image2.jpg and image3.jpg, which one is clearly an example of progressive
scan?
10) A webcam is connected to your computer using an analog connection while the
MiniDV cameras are connected using a digital connection. What is the biggest
disadvantage of the webcam’s analog connection?
11) Describe the basic problem encountered when converting motion picture film to
video using any of the Telecine processes?
12) One approach to reducing the size of the video data stream is to perform chrominance
sub-sampling. Describe chrominance subsampling?
13) Which category of video compression takes advantage of the fact that from frame to
frame a video may not change all that much?
14) Which of the two categories of video compression in its simplest form calculates
frame differences and in its more complex form does vectoring?
15) Which of the two categories of video compression compresses each video frame as a
completely specified image?
16) Looking at image4.jpg the frame capture sequence is shown for the three different
forms of mpeg video compression. In the third, most complex compression technique,
what frame(s) are needed before frame 8 can be reconstructed?
17) Looking at image4.jpg which technique uses image differencing alone?
18) Looking at image4.jpg which technique uses spatial compression alone?
19) When generating the frames that fall between the key frames in an animation
sequence which form of interpolation would more accurately show the motion of an
object under the affect of gravity?
20) What is the difference between an asymmetric codec and a symmetric codec?
21) The choice of the codec used to compress and decompress a video affects that video
in a number of different ways. Give one of these.
22) Which two animation techniques require the animator to create shadows individually,
frame by frame?
23) In 1937 Walt Disney brought Snow White to the screen using what form of
animation?
24) In the 1960’s Terry Gilliam of Monty Python’s Flying Circus fame introduced the TV
audience to what form of animation?
25) If an animator decides to use 3D computer animation techniques rather than cell
animation techniques, what additional thing(s) would they have to manage?