1. What are the differences between HTML and XML?
2. Give at least two important reasons (advantages) of adopting digital media over analog media.
3. Describe the concept of digital dithering. What is it? What is the purpose of it? How is the dithering achieved?
4. Give one example of digital image formats that supports animation.
5. Give one example of image format that uses lossy compression and one example of image format that uses lossless compression.
6. In additive color systems, we can choose RGB or CMY as primary colors. Which has a bigger gamut and why?
7. A color ink-jet printer uses the CMYK color model. It has four cartridges: Cyan, Magenta, Yellow and Key (black).
(7.1) Suppose we print a Cyan color on sheet of white paper. Now we look at the sheet under Blue light. What color does this paper sheet appear to be?
(7.2) Now we look at the same sheet under Red light. What color does this paper sheet appear to be?
8. For each of the following statements, decide whether it is True or False, and give your reason.
483_Explain concepts of interlaced scan and progressive scan.png
(8.1) On the CIE color diagram (Figure 1), let RGB be three primary colors. The gamut of this RGB color space is the interior (including boundaries) of the triangle formed by R, G, B.
(8.2) Every physically existing color can be generated by mixing the three colors Red, Green and Blue, because Red, Green and Blue are primary colors.
(8.3) Red, Green and Blue cannot be generated by mixing other colors, because Red, Green and Blue are primary colors.
(8.4) Every color can be described by a color temperature.
(8.5) The higher the color temperature is, the more saturated is the color.
9. Explain the differences between NTSC and PAL TV/video formats.
10. Explain the concepts of the interlaced scan and progressive scan in the video formats – how they work and what are the pros and cons of them respectively.
