Final Review

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Final Review
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Overview

• Review of the course
• With examples in processing
• Exam details
• Sample Questions

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Exam Philosophy

• Technical/Creative (10)
• Knowledge (80)
• Reflective/Interpretive (10)

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0. Introduction

• What IS Computer Graphics
• Core concerns
• Application areas

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1. Linear Algebra

• The exam will not involve mathematical problem
  solving
• Linear Algebra is a tool for explaining the other
  parts of the course and for understanding/attempti
  ng the labs and assignments
• You should understand
• What a vector is
• How vectors are used
• How lines, points, directions are represented

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2. Colour

• How is colour represented?
• Explain the HSL model (Dominant Wavelength
  Theory)
• Explain the RGB/CMY Model
• How is colour represented in the frame buffer or
  digital images?
• How is colour represented in print media?
• How do we account for output variations in
  different devices/media?

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3. Hardware

• Discuss input and output devices
• Define
• Frame buffer
• Colour Lookup table
• Colour depth/colour resolution a.k.a. Bits per
  pixel
• Differentiate between
• Vector and Raster Graphics
• Direct colour / indexed colour
• Scanning/Camera technology

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4. Rasterizing Primitives

• Discuss/define
• Line Drawing
• Polygon filling
• Anti-aliasing
• Demosaicing

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5. Transformations Screen coordinates

• Matrix multiplication is NOT examinable
• What are screen coordinates (a.k.a. device
  coordinates/pixel coordinates)? How is this
  different from modelling coordinates?
• What are Transformations? (how are they used)

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6. 3D Modelling

• How is 3D computer graphics different from 2D
  graphics/traditional art? What additional issues
  are we concerned with?
• How is information processed in a 3D graphics
  pipeline?
• How are objects modelled for 3D graphics
  applications? What kind of data structures are
  used?
• Define
• Texture mapping
• Bump mapping
• Voxels
• Level-of-detail (a.k.a. multiresolution)

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6(b). Modelling in practice
From Second Semester Lecture Mesh Editing in
MAX

• Define Polygon Mesh and explain what data is
  stored in it
• What is parameterization
• Define
• Lathe
• Extrude
• Sweep
• Spline
• Consider How would you draw a mesh that someone
  gave you? How would you store a mesh?

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7. Illumination

• What variables affect the colour of a point in
  the scene?
• How is the colour of a point in the scene
  calculated (Phong Illumination Model) w.r.t.
• Diffuse reflection
• Specular reflection
• Ambient lighting
• Explain the difference between Gouraud Shading
  and Phong Shading

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8. Global Illumination

• Explain the difference between Global and Local
  Illumination
• Explain how Recursive Ray-tracing works
• N.B. You will NOT be asked to talk about POVray
  syntax or write something for POV Ray

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9. Camera Modelling

• The Viewing process in 3D
• What is Projection
• Differentiate between Orthographic and
  Perspective Projection

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11. Animation

• What is animation?
• Differentiate between
• Scripted
• Performance driven
• Procedural
• Discuss (briefly)
• Behavioural animation
• Physically based animation
• Motion capture
• Key-framing
• Discuss the differences between Traditional v.s.
  Computer Aided Animation

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12. Operations on Images

• Define
• (Digital) Halftoning
• Explain
• Edge detection
• Thresholding
• Error diffusion
• Describe how you would
• blend two images together,
• fade between one image and another

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13. Processing Graphics

• Define
• Interpolation
• Parameterization
• Iteration
• How are images stored in Computer Memory?

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Some Example Questions

• (coming soon)