Pages in this set

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Data Capture

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Keyboard data entry
the most common input device
suitable for a wide range of applications
­ entering programs
­ typing all kinds of documents using a word processor
­ entering personal details of customers or patients at a
hospital, etc.

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Keyboard data entry ­
Disadvantages
Data entered at a keyboard is commonly copied
from a source document, and as such
­ It is easy to make transcription errors ­ that is, copy
the data wrongly from the document
­ It is time-consuming
­ Data entry operators who enter data all…

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Key-to-disk systems

keyboard

Supervisor's
console

Computer
keyboard Disk storage




keyboard
Magnetic
tape
storage


keyboard

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Voice data entry
The user speaks the text into a microphone
Special software interprets the text and
displays it on a screen
Text may be edited using the keyboard and
exported to a word processing package
such as Word.
The accuracy of the voice recognition
system is improved by `training'…

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Scanners and OCR
An optical scanner can be used to scan
graphical images and photographs
Software can then be used to edit or touch
up the images
Scanners can also be used to read typed or
even hand-written documents

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Scanners and OCR (continued)
OCR (Optical Character Recognition)
software can then be used to interpret the
text and export it to a word processor or
data file
Scanners are also used to input large
volumes of data on preprinted forms such
as credit card payments, where the
customers account number…

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Magnetic Ink Character
Recognition (MICR)
All banks use MICR for processing cheques.
Along the bottom of a cheque the bank's sort code,
customer account number and cheque number are
encoded in special characters in magnetic ink.
The amount of the cheque is encoded in magnetic
ink when it is handed…

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MICR(continued)
MICR has several advantages for processing
cheques:
­ It is hard to forge the characters
­ The characters can be read even if the cheque is
crumpled, dirty or smudged
­ The characters are readable by humans, unlike bar
codes

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Other data capture methods
Magnetic stripe
Smart cards
Optical Mark Recognition (OMR)
Bar code reader or scanner
Hand-held input devices
Digitiser (Graphics tablet)

Comments

Mr A Gibson

If you know your stuff about Data Capture then this would prove a useful detailed prompt for revision - download it to your mobile device for easy access..!

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