FUNDAMENTALS OF DIGITAL CAMERA

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FUNDAMENTALS OF DIGITAL CAMERA
2003. 05. 29 Ahn Hyun Sang
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Characteristics-Comparison with Film Camera

• 1)No Film
• - Using CCD and Memory Media instead of Film.
• 2) Instantaneousness
• - Having LCD panel on their body.
• 3)Unchangeable
• - Picture Information is recorded in Digital
  type.
• 4)Easily-Controllable
• -Enable the user to make some effects after
  taking the shot.

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Signal Processing
Light
Filter
Lens
CCD
Buffer Memory
Memory Media
Image Processing
A/D Converter
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CCD

• CCD(Charge Coupled Device)
• -Same as the film of a film camera.
• -The light is transformed to electric signal on
  CCD
• -CCD only analyze the strength of the light

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Color Filter
Red Yellow Magenta Green Yellow
Cyan Blue Magenta Cyan

• -To find the information about the color of the
  light, 3 color filters are located between lens
  and CCD.
• 1)RGB filter
• -The color expression is natural but the image
  sharpness is poor.
• 2)CMY filter
• -The image sharpness is good but the color
  expression is bad.

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Pixel and Resolution

• Pixels of Digital CameraCCD
• Resolution of X-axis Resolution of Y-axis
• Example) If the Resolution is 16001200
• Then we call the digital camera as 2 Mega Pixel
  Camera.
• (because 160012001920000)

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Lens

• -Bright Lens and Dark Lens
• F number(aperture value) f/A
• (ffocal length, Adiameter of aperture opening)
• F number high -gt Dark Lens
• F number low -gt Bright Lens
• -Optical and Digital zoom
• Optical Zoom Truly magnifying the image by
  using the combination of lens to control the
  focal length.
• Digital Zoom Non-true magnifying the figure. It
  magnifies the image by using software.

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Storage Media

• Flash Memory
• CF(Compact Flash) Canon, Nikon, Samsung
• SM(Smart Media) Olympus , Fujifilm
• MS(Memory Stick) Sony
• ETC
• MD(Micro Drive)
• Floppy Disk
• CD-R
• CD-RW

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References

• Books
• ??,??, ??! ??? ???-???
• PC ?? 5??
• HOW PC 5??
• WEB-SITES