UNIVERSITY EXAMINATIONS: 2020/2021
EXAMINATION FOR THE DEGREES OF BACHELOR OF SCIENCE IN APPLIED
COMPUTING
BAC 2208: DIGITAL PHOTOGRAPHY & VIDEO EDITING
FULLTIME/ PART TIME/DISTANCE LEARNING
DATE: DECEMBER, 2021 TIME: 2 HOURS
INSTRUCTIONS: QUESTION ONE IS COMPULSORY, CHOOSE TWO OTHER
QUESTIONS
QUESTION ONE (20 Marks) Compulsory
a). State Nyquist sampling theorem [2Marks]
b) Most high resolution computer monitors are not based on TV picture tubes. What is the
amount of memory that is required to store an image given a display size of 1280 X 1024?
Derive the time to transmit the image assuming bit rate of 56 kbps. [4Marks]
c). What is the relevance of lens in a camera ? [2Marks]
d) Using Lempel Ziv coding compress the following text”
DADSFDASGAASDFSADSDF (7 Marks)
e) With a colour depth of 8 bits calculate the number of colours that can be displayed
(2 Marks)
f) Explain the distinct steps in digitising sound (3 Marks)
QUESTION TWO (15 Marks)
a) Define Digital Photography (2 Marks).
b) Explain the THREE steps in a video production project (9 Marks)
c) Describe rendering as used in video editing (4 Marks)
QUESTION THREE (15 Marks)
a) State the FOUR similarities of a human eye and a camera (4 Marks)
b) State the FOUR differences of a human eye and a camera (4 Marks)
c) Highlight two functions of aperture. (2 Marks)
d) Name three types of camera and outline their uses. (3 Marks)
e) Explain pixelating in relation to the resolution (2 Marks)
QUESTION FOUR (15 Marks)
a) Explain functions of the following:
i) Exposure
ii) Shutter-Speed
iii) Aperture (6 Marks)
b) The website is to contain multimedia elements such as video.
i) Describe one benefit of including video in the website. (2 Marks)
ii) Describe one technical implication for the customer of including video in the website.
(3 Marks)
b) State the FOUR benefits of including sound in a video production (4 Marks)
