Chapter 2B
Inputting Data In Other
Ways
McGraw-Hill Technology Education
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
Devices for the Hand
• Pen based input
– Tablet PCs, PDA
– Pen used to
write data
– The device is called stylus
– Pen used as
a pointer as well like
mouse
– Handwriting recognition
– Used to take notes
– Taking signature
3B-2
Devices for the hand
• Touch screens
3B-3
– Input allows the user to
place a fingertip directly on
screen
– Sensors determine where
finger points
– Sensors create an X,Y
coordinate
– Usually presents a menu
to users
– More robust
– Easy to use
– ATM booth
Devices for the hand
• Game controllers
– Accepts input from user
through controller
– Enhances gaming experience
– Provide custom input to the
game
– Two categories: Joystick,
Game pad
– Modern controllers offer
feedback
3B-4
Optical Input Devices
Scanners
Handheld
Flatbed
 Bar code Reader or Scanner : handheld and
flatbelt
 Image Scanner or Optical character recognition
OMR (Optical Mark Reader) or Mark sense
reader
3B-5
Bar code readers
commonly track
sales in retail stores
Optical Input Devices - Scanner
• Image scanners
– Converts printed image into electronic form
by shining light on the image
– Reflects light off of the image
– Sensors read the intensity
– Filters determine color depths
– Useful because can be stored in a
computer
3B-6
Optical Input Devices – Scanner (Cont.)
• Special software for scanner:
– Optical character recognition (OCR)
•
•
•
•
•
3B-7
Converts scanned text into editable text
Each letter is scanned
Letters are compared to known letters
Best match is entered into document
Rarely 100% accurate
Optical Input Devices – OMR
• OMR (Optical Mark Reader)
– Excellent for large amount of MCQ type
format such as in examinations, or survey
questioner.
3B-8
Audiovisual Input Devices
• Microphones
– Used to record speech
– Speech recognition
• “Understands” human speech
• Useful for audio and video conferencing
• Analog sound can be converted into digital code
that computer can store and process.
• The process is called digitizing
• These files can be used in documents, web
pages or email them to other people
3B-9
Audiovisual Input Devices
• Musical Instrument
Digital Interface
– MIDI
– Connects different
musical instruments to
computer
– Digital recording or
playback of music
– Musicians can produce
professional results
3B-10
Audiovisual Input Devices
• Video Input
A PC video camera captures video
Used in presentation and on web pages
where the viewers can start, stop and
control it.
A popular PC video camera is webcam
Using video card other video devices
can be connected with PC
3B-11
Audiovisual Input Devices
• Digital cameras
3B-12
– Captures images electronically
– No film is needed
– Image is stored as a JPG file
– Memory cards store the
images
– Used in a variety of
professions
– The image can be copied to a
PC where it can be edited.
printed
Chapter 2B
End of Chapter
McGraw-Hill Technology Education
Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.