3 Answers to Review Questions. “Digital Media Primer” Yue-Ling Wong
Chapter 2
When applicable, please select all correct answers.
1. The process of converting from analog to digital information is a two–step process sampling and
quantizing. In converting an analog image to a digital image, the sampling rate affects _____.
A. the bit depth of the resulting digital image
2. The process of converting from analog to digital information is a two-step process sampling and
quantizing. In the quantization step, to convert an analog image to a digital image, _____.
A. a two-dimensional grid is applied on the image and each tiny cell on the grid is converted into a pixel
B. a two-dimensional grid is applied on the image to apply dithering to the image
C. an infinite number of color shades and tones in an analog image is mapped to a finite set of discrete color
values
D. the resulting digital image file is compressed to have a smaller file size
3. Which of the following factors will increase the file size of a digital image?
4. A digital image captured at a higher resolution _____ than it would have if it had been captured at a lower
resolution.
A. captures more details
B. has more different colors
C. has a higher bit depth
D. has a larger file size
E. has larger pixel dimensions
F. uses a higher sampling rate
5. A digital image captured at a higher bit depth _____ than it would have if it had been captured at a lower bit
depth.
6. The term pixel is contracted from the words _____ and _____.
7. True/False : A pixel is a point sample, not a little square.
8. True/False : An 1-bit color depth allows only black and white colors.
9. An 1-bit color depth allows _____ colors.
11. A 24-bit color depth allows _____ colors.
12. Bitmapped images are composed of _____.
13. Vector graphics are composed of _____.
14. The main advantage(s) of bitmapped images over vector graphics is (are) _____.
A. scalability or resolution independence of images
B. ease of editing the image content pixel by pixel
C. more compact file size compared to vector graphics
15. The main advantage(s) of vector graphics over bitmapped images is (are) _____.
A. scalability or resolution independence of images
B. ease of editing the image content pixel by pixel
C. more compact file size compared to bitmapped images
16. Sometimes when you magnify a picture on your computer screen, lines that should be straight lines
appear to be jagged. This effect is called _____.
17. Generally speaking, how does the file size change if the total number of pixels of an image is doubled?
18. Generally speaking, how does the file size change if the number of pixels of both the width and height of
an image are doubled?
19. Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 16
bits?
20. Generally speaking, how does the file size change if the bit depth of an image is increased from 8 bits to 24
bits?
22. Which of the following are file extensions of pixel-based files?
BMP DOC JPEG TXT PNG GIF FLA
JPG PSD TIFF EPS WMF SWF AI
23. Which of the following are file extensions of vector graphic files?
BMP DOC JPEG TXT PNG GIF FLA
JPG PSD TIFF EPS WMF SWF AI
24. What are the primary colors in the RGB color model?
25. What are the primary colors in the CMY color model?
26. What are the primaries in the HSB color model?
27. Which of the following color models takes the form of a color cube?
28. Which of the following color models takes the form of a hexacone?
29. Which of the primaries in the HSB color model takes the form of a color wheel?
A. hue
B. saturation
C. brightness
30. What is the color mixing method for the RGB color model?
31. What is the color mixing method for the CMY color model?
A. additive
B. subtractive
32. For the 24-bit color depth, what are the RGB values for
(i) white
(ii) black
33. What are the theoretical CMY values for
(i) white
(ii) black
(iii) red
(iv) green
(v) blue
(vi) cyan
(vii) magenta
(viii) yellow
34. What are the HSB values for
(i) white
(ii) black
(iii) red
(iv) green
(v) blue
(vi) cyan
(vii) magenta
(viii) yellow
(You can use the color picker in your image editing program to confirm your answers.)
35. What is the primary use of the CMYK color model?
36.
computer screen?