Digital Camera

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Digital Camera
Computer Application Project

• 6A Lin Wai Tong
• 6A Ng Siu Hang
• 6A Cheung Hoi Lam

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The Content

• 1.The structure 1
• 2.The structure 2
• 3.What is Digital Camera
• 4.The advantages of using Digital Camera over
  Traditional ...
• 5.What is CCD?
• 6.CCD compare to CMOS
• 7.Pixel
• 8.Optical zoom

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• 9.Digital zoom
• 10.Memory
• 11.Compact flash
• 12.Smart media
• 13.Sony memory stick
• 14.Card readers
• 15.Other functions
• 16.Transfer images to computer

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Photo flash lamp

• 1 .The Structure 1

Light sensor
viewer
Lens
Menu selector
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2.The structure 2
View finder
LCD screen
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3.What is Digital Camera?

• Digital Camera(DC) is a new type of camera which
  use CCD or CMOS to capture images and change it
  to digital format. The image is stored into the
  memory instead of the film which is used in
  traditional camera.

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4.The advantages of using Digital Camera over
Traditional camera

• We can send the digital image to computer
  directly.
• Easy to edit the photo through software.
• Share the photo through internet easily.
• No need to buy films.
• The quality of the photo can be better.
• After a long time, the photo still in good
  condition.

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5.What is CCD and CMOS?

• Charged Couple Device (CCD ), and Complementary
  Metal Oxide Semiconductor (CMOS) are the sensor
  inside the DC .
• CCD or CMOS collect photons from the object . The
  number of photons collected in each pixel is
  converted into an electrical signal.
• Then, these signals are converted to a digital
  value using the analog to digital converter (D/A
  Converter), so it changes to digital image.
• Finally, the image save into the RAM.

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6.CCD compare to CMOS

• CMOS have lower amount of power consumption.
• The cost of CMOS is lower.
• CMOS sensors are faster and smaller.
• CCD gives higher image quality.

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7.Pixel

• Pixel - The individual imaging element of a CCD
  or the individual output point of a display
  device.
• It is the smallest component of the image.
• If horizontal resolution800800pixels
  horizontally
• If vertical resolution600600pixels vertically
• horizontal resolution vertical resolutionthe
  resolution of the image.

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• 1280 x 960 pixels 1 Mega pixel1600 x 1200
  pixels 2 Mega pixels2048 x 1536 pixels 3
  Mega pixels2272 x 1704 pixels 4 Mega
  pixels2560 x 1920 pixels 5 Mega pixels ... and
  so on
• Higher numbers are always better!!

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8.Optical zoom

• Means that the camera has a real multi-focal
  length lens.
• Zoom in the far away object.
• 2X and 3X is common

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9.Digital zoom

• enlarge the center portion of the picture.
• It will not make the object more clear

Example of digital zoom
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10.Memory

• The most popular types of flash memory cards for
  use in digital cameras are
• Compact Flash (CF)
• Smart Media (SM)
• Memory Stick (MS)
• Multimedia Card (MMC)

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• Secure Digital (SD)
• xD-Picture Card (xD)
• Micro drive
• The type of memory card you use is dictated
  by which digital camera you buy. These physically
  different cards are -not- interchangeable.

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11.Compact flash

• Most common memory card including
  Kodak,HP,Nikon,Canon,Epson,Casio etc using.
• Larger memory value.
• Faster read-write speed.
• Thicker than smart media.
• Higher in price.

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12.Smart media

• Card size is thinner and lighter.
• Memory size is small, up to 128MB
• Cheaper than compact flash.

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13.Sony memory stick

• Only support Sonys devices.
• Memory size 4MB up to 128MB
• Small size

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14.Card readers

• A device that you insert flash memory cards into
  to transfer the data to the computer.
• Much faster than the serial port!
• No need connect DC into computer
• Can read many types of memory cards, eg compact
  flash, smart media etc.

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15. Other functions

• MP3 player
• Recorder
• Video
• Web Cam
• Many mobile phones have the DC function

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16.Transfer images to computer

• IEEE-1394 - it's a high-speed input/output bus
  used by digital video devices.
• USB
• CARD READER

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• The End