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30 August 2006. Sensing. Refresher on Complex Numbers. http://www.clarku.edu/~djoyce/complex/ http://www.dspguide.com/ch30.htm. World is practically continuous in time space color brightness. 10 11 dynamic range brightness. Digital World. Quantized in: time space color brightness.

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30 August 2006


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Presentation Transcript
refresher on complex numbers
Refresher on Complex Numbers
  • http://www.clarku.edu/~djoyce/complex/
  • http://www.dspguide.com/ch30.htm
digital world
Digital World
  • Quantized in:
    • time
    • space
    • color
    • brightness

how many frames/second?

how many pixels?

how many primaries?

how many bits/pixel?

outline
Outline
  • Image formation
    • Pinhole camera
    • Point source (x-ray)
    • Lens
  • Sensors
    • Film
    • Image orthicon
    • CCD
pinhole camera
Pinhole Camera

Features?

Tradeoffs?

slide8
Lens

Features?

Tradeoffs?

how tv worked in the old days
How TV Worked(in the old days)
  • What is a cathode? What is a cathode ray? What is a cathode ray tube?
  • What is a phosphor? What are "phosphorescence"and "fluorescence"?
  • How does a "cathode ray tube" CRT work?
  • How was the TV image acquired?
  • What is a "raster" scan?
  • What are horizontal and vertical "sync"?
  • What is "interlace"? Why do that?
  • What determines the "resolution"?
  • What is "gamma" and why should it be corrected?
  • How did they get color?
  • How do decisions made in the 40's affect CG, CV, and IP today?
charge coupled device
Charge Coupled Device

From: http://www.science.ca/scientists/scientistprofile.php?pID=129