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Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
Ch01  -introduction
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Ch01 -introduction

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  • Manipulation? Image Processing?
  • Transcript

    • 1. Introduction
      EL5130-Computer Graphics & GPU Programming
    • 2. Computer Graphics
      Graphics created by computer
      The representation and manipulation of pictorial data by computer
    • 3. Human perception
      Interactive graphics is (typically) for human viewers
      Guided-missile design is a counterexample
      Human will be presumed in this course
      Good designers know their customers’ needs and problems
      Have basic understanding of visual perception
      NTSC is a great engineering design example
      The evolution of computer graphics has been directed by the quirks of human perception, e.g.,
      Tri-color stimulus
      Sensitivity to change in light reaching the eye
    • 4. Purpose of computer graphics?
      Communication is the purpose
      Human perception is the context
      Techniques leverage visual perception abilities
      Fidelity is a tool, not (necessarily) the goal
      Virtual reality is great, but
      Don’t want to be limited to reality
      Want to do super reality
      Non-photorealistic rendering (NPR) is valuable
      Bill Buxton, Sketching User Experiences, 2006
      No apology is required for “approximations”
      Especially for interactive graphics
    • 5. Color perception
      Color is perceptual
      Stimulus is spectral energy in 400-700 nm range
      Monochromatic differentiation requires:
      Overlapping cone sensitivities (ratios)
      Only two cone types
      Three cone types (a human quirk)
      Enrich our perceptual experience
      Require stimulation with (at least) three “colors”
      RGB is the display tuple
      Normalized typical human cone cell responses to monochromatic spectral stimuli (Source: Wikipedia)
    • 6. Dual (3D Realistic) Computer Graphics & Image Processing
      Computer Graphics Visualization
      Image Processing
    • 7. Pixels
      imaging
      CCD sensor (Bayer pattern)
      graphics
      LCD display
      pixel
    • 8. Pixels
      Why do CCDs use the Bayer pattern?
      Why don’t LCD monitors use the Bayer pattern?
      What is graphics missing?
      Microsoft ClearType
      Claude Betrisey, Jim Blinn, BodinDresevic, Bill Hill, Greg Hitchcock, Bert Kely, Don Mitchell, John Platt, Turner Whitted, 20.4: Displaced Filtering for Patterned Displays, Society for Information Display, 2000.
    • 9. Basic 3D Graphics Pipeline
    • 10. Graphics
      image (pixels)
      objects (triangles)
      lights (photons)
      viewer
    • 11. Physical reality (sort of)
      objects (triangles)
      for (each photon)
      for (each triangle)
      for (each pixel)
      draw;
      lights (photons)
      image (pixels)
    • 12. Ray tracing
      objects (triangles)
      for (each pixel)
      for (each triangle)
      for (each light)
      draw;
      lights (photons)
      image (pixels)
    • 13. Physical reality (sort of)
      objects (triangles)
      for (each light)
      for (each triangle)
      for (each pixel)
      draw;
      lights
      image (pixels)
    • 14. Traditional graphics pipeline (OpenGL)
      objects (triangles)
      for (each triangle)
      for (each light)
      for (each pixel)
      draw;
      lights
      image (pixels)
    • 15. Modern graphics pipeline (OpenGL 2.1)
      objects (triangles)
      for (each triangle)
      for (each pixel)
      for (each light)
      draw;
      lights
      image (pixels)
    • 16. Global illumination
      Light paths are complex, not light  triangle  pixel
      Nature finds equilibrium efficiently
      Computers struggle 
    • 17. Animation
      Sequence of still frames
      Update rate: minimum of 24 hz or so
      Flicker rate: minimum of 50 hz or so
      “Rule 1”:
      All discontinuous frame-to-frame changes correspond to discontinuous scene or visibility changes
    • 18. Interactive graphics
      System latency
      Frame rate and flicker rate
    • 19. Impact of Computers
      Moore’s Law
      Power of a CPU doubles every 18 months / 2 years
    • 20. Impact of Video Games (Nvidia)
      Number of transistors on GPU doubles each 6 mos.
      Three times Moore’s Law
      Good article on Jen-Hsun Huang, Nvidia CEO: http://www.wired.com/wired/archive/10.07/Nvidia_pr.html
      "What we've done in the past five years is staggering,“ "What we can do in the next five years is going to blow your mind. In 10 years, we should be bigger than Intel."
      How is come?
    • 21. Topics
      (Conventional) Computer Graphics Pipeline
      Core graphics pipeline: Modeling transformation, viewing transformation, hidden surface removal, illumination / shading / textures, scan conversion / clipping
      OpenGL
      Morphing, curves and surfaces, animation, etc.
      GPU Programming
      Not a course about graphic design, using graphics tools like PhotoShop or Maya but possibly you will use it in the assignments
    • 22. Prerequisites
      You will be writing programs
      Non-trivial data structures, pointers
      An ability to learn a programming library on your own
      OpenGL
      Comfortable with matrix algebra and calculus
      Basic linear algebra
    • 23. Work
      Assignment & Programming assignments (30%)
      C/C++ using OpenGL, GLUT, and UI libraries
      Source will be read and documentation is req’d
      Product Development Project (50%)
      Final Exam (20%)
    • 24. http://course.lskk.ee.itb.ac.id
      Courses Workflow
      Wednesday, 13.00 – 13.50
      Tuesday, 10.00 – 11.40
    • 25. Honor Code
      Specific honor code instructions will be provided with each assignment
      When in doubt…
      Don’t use resources other than class notes and textbook
      Typically…
      Using examples from the web is a great way to learn and it is encouraged… reference what you use
      Discuss things and working together is encouraged, but
      In general, it is unethical and it is discouraged to share assignment code with another student or debug assignment code together
    • 26. 1st Assignment
      Single page essay on the impact of graphics cards based on an article in http://www.wired.com/wired/archive/10.07/Nvidia.html
      Why do CCDs use the Bayer pattern?
      Why don’t LCD monitors use the Bayer pattern?
      Why do we need ClearType™ font? How it works?

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