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30 August 2006

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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  1. 30 August 2006 Sensing

  2. Refresher on Complex Numbers • http://www.clarku.edu/~djoyce/complex/ • http://www.dspguide.com/ch30.htm

  3. World is practically continuous intimespacecolorbrightness 1011 dynamic range brightness

  4. Digital World • Quantized in: • time • space • color • brightness how many frames/second? how many pixels? how many primaries? how many bits/pixel?

  5. Outline • Image formation • Pinhole camera • Point source (x-ray) • Lens • Sensors • Film • Image orthicon • CCD

  6. Pinhole Camera Features? Tradeoffs?

  7. Lens Features? Tradeoffs?

  8. 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?

  9. Cathode Ray Tube

  10. Vidicon (tv camera)

  11. X-Ray

  12. X-Ray

  13. Charge Coupled Device From: http://www.science.ca/scientists/scientistprofile.php?pID=129

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