Inputting Data in other Ways

1. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill Technology Education
McGraw-Hill Technology Education Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

2. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill Technology Education
Chapter 3B
Inputting Data In Other
Ways

3. 3B-3
Devices for the Hand
• Pen based input
– Tablet PCs, PDA
– Pen used to
write data
– Pen used as
a pointer
– Handwriting
recognition
– On screen keyboard
– This device also
called stylus

4. • Pen based computers are not used
generally to enter large amounts of text,
although they are used frequently for
taking notes, creating short messages
and writing annotations on electronic
documents.
• Commonly used for data collections
• Inputting signatures or messages that
are stored and transmitted as a graphic
image.
3B-4

5. 3B-5
Devices for the hand
• Touch screens
– Sensors determine
where finger points
– Sensors create an
X,Y coordinate
– Usually presents a
menu to users
– Found in cramped or
dirty environments

6. • Automated teller machine or public
information booths. also common in fast
food restaurants, supermarkets,
drugstores.
3B-6

7. 3B-7
Devices for the hand
• Game controllers
– Enhances gaming experience.
– Provide custom input to the game
– Modern controllers offer feedback
Two broad categories
– Joystick
– Game pad

8. 3B-8
Optical Input Devices
• Allows the computer to see input
• Bar code readers: is the flatbed model
which commonly found in supermarkets
and department stores. FedEx use
handheld bar code readers in the field to
identify packages.
– Converts bar codes to numbers
• UPC code
– Computer find number in a database
– Works by reflecting light
• Amount of reflected light indicates number

9. • The Universal Product Code (UPC) is
a barcode symbology that is widely used
in the United States, Canada, United
Kingdom, Australia, New Zealand, and
in other countries for tracking trade
items in stores. UPC (technically refers
to UPC-A) consists of 12 numerical
digits, that are uniquely assigned to
each trade item.
3B-9

10. 3B-10
Optical Input Devices
• Image scanners
– Converts printed media into electronic
– Reflects light off of the image
– Sensors read the intensity
– Filters determine color depths

11. 3B-11
Optical input devices
• Optical character recognition (OCR)
– 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

12. 3B-12
Audiovisual Input Devices
• Microphones
– Used to record speech
– Speech recognition
• “Understands” human speech
• Allows dictation or control of computer
• Matches spoken sound to known phonemes
• Enters best match into document

13. 3B-13
Audiovisual Input Devices
• Musical Instrument Digital Interface
– MIDI
– Connects musical instruments to computer
– Digital recording or playback of music
– Musicians can produce professional results

14. 3B-14
Audiovisual Input Devices
• Digital cameras
– 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

15. Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill Technology Education
Chapter 3B
End of Chapter