Transcript Reading tools

Reading tools
Andrea Vudrag
Reading tools allow computers to rapidly read marks that
represents codes.There are different types of reading
tools:
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Optical mark readers
Magnetic ink character readers
Ber code readers
Radio frequency indentification
readers (RFID)
Optical mark readers
This readers use reflected light to
determine the location of pencil marks on
standardized test answer sheets and
similar forms.
Magnetic ink character
readers
This kind of reading tools read those oddshaped numbers printed with magnetic
ink on check.
Bar code readers
This readers use light to read UPCs
(universal product codes),inventory
codes, and other codes created from
patterns of variable-width bars.
In many stores,bar code readers are
attached to point-of-sale (POS)
terminals,which send scaned
information to a mainframe computer.
Radio frequency
indentification (RFID)
readers
They use radio waves to communicate with
Radio frequency indentification (RFID) tags.
When energized by a nearby RFID reader,an
RFID tag broadcasts its unique indentification
number to the reader,which digitizes the
information for input into a computer.
They can be as large as a deck of cards or as
small as a grain of rice.
RFID tags are also used to indentify railroad
cars,automobiles at toll booths etc.
Optical character
recognition (OCR)
This technology is used for recognizing
individual characters on a printed
page,so they can be stored and edited as
text.
How does it work
Before a computer can recognize
handwriting or printed text,it must first
create a digital image of the page that it
can store in memory.This is usually done
with an input device known as scanner.
The computer can then use OCR
software to interpret the black-and-white
scanned patterns as letters and numbers.
Special-purpose scanners
 Pen scanners
 Handwriting recognition software
 Personal digital assistants (PDAs)
Pen scanners
They look like highlighters,but they are
actually wireless scanners that can
perform character recognition on the fly.
When you drag a pen scanner across a
line of printed text,it creates a text file in
its bulit-in memory,where it is stored until
you transfer
Personal digital assistants
(PDAs)
These are handheld pen computers that serve
as pocket-sized
organizers,notebooks,appointment books,and
communication devices.
They can also be programmed for specialized
work,ranging from sports scorekeeping to
medical analysis.
Newer models feature multimedia
functionality,such as music playback and video
and photo viewing.
Smart whiteboard
It can serve as an input device for a
PC,so each board full of information is
stored as a digital image on the
computer’s disk.
Handwriting recognition software can turn
the whiteboard notes into a text file that
can be emailed to meeting or class
participants.
THE END