BAR CODE BASICS

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# BAR CODE BASICS - PowerPoint PPT Presentation

BAR CODE BASICS. INTRODUCTION TO LINEAR AND BIDIMENSIONAL SYMBOLOGIES. BAR CODE BASICS. Optical Symbologies. 1 D - Codes. 2 D - Codes. STACKED CODES. BAR CODES. MATRIX CODES. BAR CODE BASICS. What is a ONE-D code?

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Presentation Transcript

BAR CODE BASICS

INTRODUCTION TO

LINEAR AND BIDIMENSIONAL

SYMBOLOGIES

BAR CODE BASICS

Optical Symbologies

1 D - Codes

2 D - Codes

STACKED CODES

BAR CODES

MATRIX CODES

BAR CODE BASICS

• What is a ONE-D code?

It is a sequence of dark and light elements. The code can be considered like an alphabet where each character is composed by a specific sequence of “BARS” and “SPACES”.

BAR CODE BASICS

• What is a Stacked code?

The terms stacked symbology or multi-row code are applied to those codes composed by stacked rows of one dimensional bar codes. Each row is independently decoded, but the complete information is obtained appending the single content of all individual rows.

BAR CODE BASICS

• What is a matrix Code?

The term matrix code applies to 2D symbologies composed by black elements positioned in specific locations of a matrix. Each element has the same dimension, and the relative position of all elements in the matrix determines the information content of the code.

BAR CODE BASICS

• What is a Composite code?

It is the combination of a linear and a stacked code. Typically, the linear code identify the item, and the stacked code contains additional relevant information (i.e. production date, expiration date, batch number, etc.).

=

CODE 128

Datamatrix

BAR CODE BASICS

• Why 2-D codes?
• To reduce space
• To increase the quantity of information

SUITABLE APPLICATIONS for 2-D CODES

there is lack of space

All applications in which

a lot of information is needed

or

there exist need for portability of the code information content

STACKED SYMBOLOGY: PDF417
• PDF: Portable Data File
• multi-row type: developed in 1992
• number of row: 3-90
• number of columns: 1-30
• row width: start/stop pattern, 3-32 symbol characters, quite zone
• row height: 3X (cross row scanning: greater tilt angle), no row separator
• max. data per symbol:
• numeric: 2710 digit
• alphanumeric: 1850 characters
• it introduced the concept of error detection; and more: user selectable error correction levels
• applications:
• Government/Postal: identification card, official document
• Healthcare: specimen tracking, claims processing, reagent calibration
• Logistic: package tracking, shipping list
• Manufacturing: process control, quality control, component control
MATRIX SYMBOLOGY: DATA MATRIX ECC200
• matrix code type, International Data Matrix 1990:
• L-shaped dark finder pattern
• infinitely scalable
• Append structure up to 16 symbols
• Reed-Solomon error correction
• pack lot information into very small place: up to 3116 numeric or 2335 alphanumeric characters
• most popular application:
• marking of small items
• Direct Part Marking (DPM)
• small component marking (selected by EIA)
• silicon wafer marking (selected by SEMI)
• pharmaceutical unit dose and product marking
2D BENEFITS VS. 1D
• Information just whereyou need it: on the spot and on the fly
• Robustness ofthe printed 2D symbols