Computer Science 1033A/B Study Guide - Final Guide: Glossary Of Computer Graphics, Color Depth, Chroma Subsampling

74 views11 pages
COMPSCI LECTURE QUESTIONS
LECTURE 2
1. Which area do you think has the most people?
1. Africa,
2. Asia
3. Europe,
4. Latin American/Caribbean
5. Middle East,
6. North America
7. Oceania/Australia
2. Which area do you think has the most Internet users? North America
3. Which area is the smallest, has the least users? Africa
4. Difference between the World Wide Web and the Internet? Internet is the hardware that makes
things connect and the WWW runs ON the internet
On a 17 inch monitor, we could have 800 pixels (width) by 600 pixels (height) OR 1024 pixels by 768
pixels.
5. What is the terminology for the number of pixels across by the number of pixels down? Resolution
6. Which resolution will have the bigger pixels? 800 by 600
7. If we displayed this E, o hih sree, hih resolution would it be bigger in? 800 by 600
8. Which one will have bigger dots 72dpi or 300dpi (where dpi means dots per inch)? 72 dpi
9. What colour do you think this is #222222 in hexadecimal representation? Dark grey
10. What colour do you think this is #CCCCCC in hexadecimal representation? Light grey
11. What year was HTML/World Wide Web created? 1991
12. What does CRAP stand for? Contrast, Repitition, Alignment, Proximity
13. Give 2 reasons why selling via the World Wide Web is a great idea? Cheap, fast, accessible by many
people
LECTURE 3
14. What do we call a sample in an image? Pixel
15. If you had an image that was 3000 pixels by 1500 pixels, for the print quality to be good enough to
the human eye, what size should you print it at? 3000/300 10 inches by 1500/300 5 inches.
DON’T PRINT IT ANY LARGER THAN ” y 
16. How many pixels will a 4 inch by 6 inch image be if we scan it in at 100 dpi? 4(100) * 6(100) = 240
000
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in
17. Assume we have 3 images, all 3 images are 100 pixels by 100 pixels but they were each scan in with
different dpi. (One was 10dpi, one was 50 dpi, one was 100dpi). Which of the following statements
are true?
1. All 3 images will have the same file size TRUE
2. The image that was scanned in at 100dpi will print smaller than the one scanned in at 10dpi
TRUE
18. How many pixels is an image that is 800 pixels by 800 pixels? 640 000
19. How many megapixels is that image? 0.64 megapixels
20. How big would this picture be if you printed it out at 200 dpi? 4 inch by 4 inch
21. How big would this picture be if you printed it out at 100 dpi? 8 inch by 8 inch
22. How many colours can you represent with 4 bit colour? 16
23. How many things can you represent with a 5 bit depth (5 bits)? 32
24. What is the smallest value that you should set the dpi for an image that you plan to print? 300
25. When converting analog to digital what two things do you have to do to analog data? Sampling and
quantizing
26. How big will the following image be when printed? 600 pixels by 900 pixels, printed at 300 dpi? 2
inch by 2.66 inch
27. What bit depth do you need to represent a black and white image? 1
LECTURE 4
28. How big will a picture PRINT that was saved at 50DPI and is 200 pixels by 200 pixels? 4x4 inch
29. If we have an image that was scanned in at 300dpi and was 2 inches by 3 inches, how many pixels
will it be? 540 000 pixels
30. How many lines of text could you fit on a page given the following information? The font size in a MS
Word Document is set to be 36 points. We are using standard 8 ½ by 11 inch paper, portrait, with a 1
inch margin at the top and a ½ inch margin at the bottom. The leading is 0 (no space between the
lines). If 72points = 1 inch, then 36 points = ½ inch 11-1.5= 9.5/ ½ = 19
31. Convert the following binary numbers to decimal
1. 1001 9
2. 0101 5
3. 1010 10
4. 0011 3
5. 1111 15
32. Are these colours the same:
1. <00,00,00> and #000000? Yes
2. <255,00,255> and #FF00FF? yes
3. <66,00,99> and #660099? NO!! but they are similar why? Idfk
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in
33. Match the encoded color to the correct color name:
White #FFFFFF
Bright green #00FF00
Light Gray #FAFAFA
Bright Blue (0,0,255)
Black (0,0,0)
Dark Grey (14, 14, 14)
Medium Gray (125, 125, 125)
34. Which of these statements do you think is TRUE: A or B?
A: You can convert a vector graphic image into a bitmapped image easily but you cannot easily
convert a bitmapped image into a vector graphic image.
B: You can convert a bitmapped image into a vector graphic easily but you cannot easily convert a
vector graphic image into a bitmapped image.
35. Assume we have a picture that is:1600 pixels by 1200 pixels (takes up the whole screen and more
depending on your resolution. Each pixel will need 3 bytes (8 bits for red, 8 bits for green, 8 bits for
blue) to represent the colour of each pixel <R,G,B>. How many bytes, kilobyte and megabytes is the
image? 1600 * 1200 * 3 = 5,760,000 bytes 5760000/1024 = 5625 Kilobyte 5625/1024 = 5.5
Megabytes
36. What can we do to make our images smaller? Make the image physically smaller (less pixels) OR
compress image file
37. How big will an image be in terms of bytes if it is uncompressed, true colour and 200 by 400 pixels?
200*400*3 = 240 000
38. How many colours can you represent with 5 bits? 2^5 = 32
LECTURE 5
39. 8-bit indexed colour uses 256 colours. TRUE
40. Vector images look good even if you resize them to make them bigger. TRUE
41. How many different colours will 6 bits allow for (a 6 bit colour depth)? 2^6 = 64
42. why no dithering in JPEG? Beause it uses  it olors so there is  illio olors so it does’t
need to dither
43. How big will an image be in terms of bytes if it is uncompressed, true colour and 200 by 400 pixels?
240 000
44. What type of opressio does’t lose ay of the origial iforatio aout the iage?
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 11 pages and 3 million more documents.

Already have an account? Log in
mikekuo58 and 38820 others unlocked
COMPSCI 1033A/B Full Course Notes
25
COMPSCI 1033A/B Full Course Notes
Verified Note
25 documents

Document Summary

Internet is the hardware that makes things connect and the www runs on the internet. 3000/300 10 inches by 1500/300 5 inches. 000: assume we have 3 images, all 3 images are 100 pixels by 100 pixels but they were each scan in with different dpi. (one was 10dpi, one was 50 dpi, one was 100dpi). Which of the following statements are true: all 3 images will have the same file size true, the image that was scanned in at 100dpi will print smaller than the one scanned in at 10dpi. Word document is set to be 36 points. We are using standard 8 by 11 inch paper, portrait, with a 1 inch margin at the top and a inch margin at the bottom. The leading is 0 (no space between the lines). Idfk: match the encoded color to the correct color name: