MGMT 1000 Lecture Notes - Lecture 2: Personal Digital Assistant, Graphics Tablet, Handwriting Recognition
MGMT 1000 Tutorial 2 Notes – Bar code readers
Introduction
• Early OCR software required the use of special typefaces for the scanned image and
produced a lot of errors.
• The amount of proofreading required often nullified any advantage to using the
scanner.
• As OCR software continues to improve, the use of scanners to read typed text directly
from the page will undoubtedly increase as a source of alphanumeric data input.
• A variation on OCR is also used to read specially encoded characters, such as those
printed magnetically on checks.
• Another variation, handwriting recognition, is used to identify characters entered as
input to a graphics tablet pad or the touch screen of a tablet PC, personal digital
assistant, or cell phone.
• This technology continues to improve.
• Still limited to small quantities of data, carefully printed.
• Attempts to extend character recognition to scanned documents and to characters
written in cursory script have been largely unsuccessful to date.
• Another alternative form of data input is the bar code reader.
• Bar code input is practical and efficient for many business applications that require fast,
accurate, and repetitive input with minimum employee training.
• You are probably most familiar with its use at grocery checkout counters
• Many organizations use bar codes, particularly for inventory control and order filling.
• Bar codes represent alphanumeric data.
• The UPC bar code for example translates to the alphanumeric value 780471 108801
90000.
• Bar codes are read optically using a device called a wand that converts a visual scan of
the code into electrical binary signals that a bar code translation module can read.
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