Introduction to Computer Graphics

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Introduction to Computer Graphics

• Survey (Chapter 1)
• Graphics Systems (Chapter 2)

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What is Computer Graphics?

• Perhaps the best way to define computer graphics
  is to find out what it is not. It is not a
  machine. It is not a computer, nor a group of
  computer programs. It is not the know-how of a
  graphic designer, a programmer, a writer, a
  motion picture specialist, or a reproduction
  specialist.
• Computer graphics is all these a consciously
  managed and documented technology directed toward
  communicating information accurately and
  descriptively.
• Computer Graphics, by William A. Fetter, 1966

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What is CG used for?

• What can you think of?

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What is CG used for?

• Graphs and charts (visualization of data)
• Graphical User Interfaces (GUI)
• Web pages
• Computer Aided Design (CAD)
• Entertainment (games, music)
• Art
• Virtual Reality (training simulators)

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2D versus 3D
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Display Devices

• Raster systems
• Vector Systems

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Video Display Systems
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Output Devices
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Raster-Scan CRT
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Cathode Ray Tube

• Deflection can be
• magnetic
• electrostatic

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Color CRT
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3D Displays
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Input Devices

• How many input devices can you think of that
  could be useful for graphical applications?

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Input Devices

• Keyboard
• Mouse
• Tablet
• Joystick

• Digitizer
• Gloves

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Graphics Software
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