Microsoft P Data Matrix [Read Only] Intro To
2009-05-25
: Microscan Intro To Data Matrix intro_to_data_matrix resources
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Bar Codes 101 Introduction to Data Matrix 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 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 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 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 Additional features • Symbol density • Encodes 50 characters in 6mm x 6mm square • Symbol versatility • Readable in 360° with 2D CCD technology Skew axis ±30° Tilt axis 360° Pitch axis ±30° Advantages and disadvantages Advantages Disadvantages ■ Small size ■ Expensive hardware ■ No orientation requirements ■ Slower to process ■ Easy to print ■ Built-in error correction makes it very secure and robust 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
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