P1259129710JDRha

1
Digitizer
Leung Yuen Ki, Yuki
F.4F
2040137(16)
20th December, 2002
2
What is digitizer?

• Digitizer is used to convert any analog source
  of input, such as the lines in a picture, to a
  series of binary code in a computer. So it is a
  kind of input devices.

3
Examples of digitizer
Modem
Graphics Tablet
4
Examples of digitizer
Digitizer pointer
scanner
Video digitizer
5
Function of digitizer

• Change analog signal in telephone line to
  digital signal for computer

digital signal
analog signal
Modem
Internet
6
Function of digitizer
Change analog signal in the picture to digital
signal for computer
digital signal
analog signal
scanner
7
ADVANTAGES
Digitizers can digitize directly without having
to draw the pattern onto a piece of paper first.
Digitizer can draw a better picture than mouse.
Digitizer can help to draw and transfer
information more easily.
8
Disadvantages

• Low CPU speed
• Low display readability
• Very expensive

9
Source of information
http//ngis.moi.gov.tw/doc/ngis-explanation/2b.htm
http//www.atlantic-marketing.com/cad.html
http//www.outlinetechnologies.com/serv05.htm
http//www.jsigle.com/qlr/tech.htm
http//www.yes.com
10
The End