1. Which of the following would you class as analog?
an audio tape
an audio CD
a phonograph record
a computer CD
a radio signal
a television signal coming to your reciever
the signals on a videotape
2. What are some of the advantages of converting analog information
to digital information
3. What does the term "sampling rate" mean referring to digital sound?
it is when you take a sound wave and take samples then take the highest point double it then put samples back together
4. What are some of the disadvantages of converting analog information to digital information
when you convert decimals to digital it rounds numbers up or down making it not as percise
5. Why is it necessary for us to learn about images and image files?
Much of the work you do this year will use graphic images to communicate ideas. For this reason, we must understand a few fundamental ideas about using images before we start the course.
6 Obtain a copy of "The Computer Paper". Look at at a color photograph closely and describe the pattern you see in the halftone dots.
there were little triangles of red blue and yellow.
7. Look at a color image on your computer screen closely. Do the dots (PIXELS) make the same pattern as the halftone dots in question 2? Which pattern is more regular? Why do you think one pattern is less regular than another?
the dots on the computer are closer. the computer is more regular. because the paper uses a machine which can slip every once and a while.
8. Look at the photograph on display closely. Do you see a dot pattern? What do we call the dots that a photographic image is made up of?
it does have dots and they are called digital analog
9. Would a raster (bitmap) or a vector image be easier to make larger without losing resolution? Explain your answer
vector. because a vector image is made by drawing each pixel according to a stored mathematical formula
10. Imagine that you have just taken a photograph with a digital camera. Would it be saved as a bitmap or as a vector file?
a bitmap.
11. If you are looking at two images of the same scene, image B is composed of twice as many pixels as image A, which image would have a higher resolution? Which image could be made larger before it began to pixellate? Explain your answer.
b has higher resolution because it has double the pixels.because b has twice the pixels it can be streached to a larger size without pixelating
12. If you looked at a 100x100 pixel image with screen resolution set to 800x600 resolution, would the image be bigger or smaller if the resolution was suddenly changed to 640x480 resolution? Explain your answer.
the image would be biger because there is less room on a 640x480
13. Explain why a 100x100 pixel color image of a subject would create a bigger file when saved than a 100x100 pixel black&white image of the same subject.
color image requires morespace because it has more info to store
14. Would a computer graphics professional always want the highest possible resolution for all of the images used? Explain your answer.
No becaues when presenting it takes to long to load and most people dont like that
15. Which two file formats are accepted on the WWW (World Wide Web) ... (the internet)
gif and jpg
16. Would you save a cartoon you drew in Microsoft Paint as a JPG or GIF if you wanted to put it on the internet?
you would save as a gif
17. What file format would you use for a photograph you wanted to put on the internet? Why?
gif because its smaler and will take up less room
18. What is the most common bitmap format for Windows computers?
tiff
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