Microsoft P Data Matrix Train Intro

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Introduction to Data Matrix

Bar Codes 101

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Symbology profile

•Introduced in 1995

•AIM standard released in 1996

•Quiet zone required around perimeter

•The border is composed of 2 slides forming an “L” pattern and 2 sides

alternating light and dark elements

•The border is known as the finder pattern and used for determining

size, orientation, and symbol distortion

•Symbol sizes range from 10x10 to 144x144

•Maximum size capacity: 2,335 alphanumeric, 3116 numerical, or 1556

bytes

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Symbol structure

•Element (module)

•Square shaped cell that encodes

one bit of binary data

•= Binary “0”

•= Binary “1”

•Consistent size throughout code

•Dependent on finder pattern

color

•Quiet zone

•AIM specification calls for a

minimum of one element width

(1x) on each side of the symbol

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Symbol structure continued

•Structure Finder Pattern

•The outermost rows and columns

•Composed of two solid lines and two

alternating dark/light lines

•Used to define physical size,

orientation, distortion and the

number of rows and columns

•Data Region

•The area inside the finder pattern

•Contains data and error correction

code words

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Symbol data regions

•Symbol can have multiple data

regions

•Maximum capacity for a

single data region

•88 numeric

•64 alpha/numeric

•Symbol shape can be square or

rectangular

•Rectangular shape

applicable only to ECC 200

"Alignment pattern"

separates regions

Microscan Training Materials ©Microscan Systems, Inc. All rights reserved.

Additional features

•Symbol density

•Encodes 50 characters in 6mm x

6mm square

•Symbol versatility

•Readable in 360° with 2D CCD

technology

Tilt axis

360°

Pitch axis

±30°

Skew axis

±30°

Microscan Training Materials ©Microscan Systems, Inc. All rights reserved.

More information

•If you have questions regarding this topic, send us an e-mail to

training@microscan.com

•If you would like further information about bar code

symbologies, we recommend you view Intro to PDF417 or Intro

to Linear Bar Codes