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Test Logistics

  • Test 1 will be on Wednesday, September 26 and will cover Chapters 1 - 3.
  • The test will consist of a series of multiple choice questions.
  • The test will be administered at the beginning of class. No make-ups will be given without an excused absence (please remember that traffic and job-related activities are not excused absences), so please be on time.
  • No notes will be allowed on the test.
  • Information on the points in the study guide below were given in class lectures. Most of this information can also be found in either the class textbook or the lecture slides, which are posted to D2L. However, please don't hesitate to contact me if you're still confused about something.

Study Guide

  • Know that affordances of a new medium become apparent only over time. When a new medium is first introduced, it tries to copy older media. Be prepared to cite an example of this phenomenon.
  • Know that computer usage exploded once computers moved from a command-line interface to a GUI (graphical user interface)
  • Know how many
    • bits are in a byte
    • bytes are in a kilobyte (KB)
    • kilobytes are in a megabyte (MB)
    • megabytes are in a gigabyte (GB)
    • gigabytes are in a terabyte (TB)
  • Know the difference between discrete and continuous and that computers only understand the former. Know that we use sampling to turn continuous data into discrete data that a computer can understand.
  • Know the difference between a decimal (base 10) and binary (base 2) counting system.
  • Know the definition of
    • sample rate
    • quantization levels
  • Know that decreasing the sample rate or # of quantization levels reduces file size but also degrades media quality
  • Know the definitions of and difference between bitmaps and vector images, including
    • what makes bitmap files increase in size vs. what makes vector images increase in size
    • what an RGB value is
  • Know that computers store all digital media as arrays of numbers
  • Know how many bits it takes to store the RGB value for 1 pixel
  • Know what image layers are in image manipulation programs like GIMP and Inkscape. Why are layers useful?
  • Know what aliasing is and why anti-aliasing is necessary in converting vector graphics to bitmaps
  • Know what it means to translate, scale, rotate and reflect an image
  • Straight lines in vector graphics can be specified using only starting and ending coordinates
  • Rectangles, squares can also be defined with two coordinates
  • Circles and ellipses can be defined with two (or fewer) coordinates and a radius
  • Know the difference between a closed and open polyline
  • Know what a Bezier curve is and why such curves are useful
  • Know what upsamping and downsampling mean
  • Know what Interpolation and Convolution mean
  • Know how the following compression techniques work
    • Table Method (aka Dictionary Method)
    • Run-Length Encoding (RLE)
  • Know that for any compression technique, there is always the possibility that the compressed file is larger than the original file.
    • Know the difference between lossy and lossless compression and be prepared to identify examples of each
    • Know that JPEG is a lossy compression format for images that works by discarding a lot of the high-frequency stuff that the human eye doesn't see very well. Compression artifacts are most apparent at sharp edges between colors.
  • Know the difference between color on the printed page and color on the screen (absorbed vs. emitted light)
  • Know the difference between an additive and a subtractive color process.
  • Be prepared to identify what a colored object looks like under colored light. Ex. What color is a red ball in a blue-lit room?
  • Given an RGB value, be prepared to identify what color it is. Ex. What color is (255, 0, 0)?
  • Know what bit depth is and why it's important
    • What's an advantage of having higher bit depth?
    • What's an advantage of having lower bit depth?
  • Know what a color palette for an image is, how it's calculated and why it's useful.
  • Know what dithering is and why it's useful
  • Know how the CMYK and HSV models work
  • Know what it means to divide an image up into color channels and why this is useful
  • Know what a color cast is
  • Know what it means to apply cropping, healing, sharpness and brightness/contrast to an image
  • Know the difference between the four types of scanners: flatbed, sheet-fed, handheld, drum

Additional Resources

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