6.6 KiB
All about pdf417 - 2D Barcodes
FTA TECHNOLOGY CONFERENCE 2D BARCODES AT A GLANCE Carlos Gonzalez CTO Dataintro Software FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) ABOUT 2D BARCODES • Appeared in 1988 (with Code 49 - Intermec) • Used in a variety of environments (surgical, electronic parts, transportation, stamps, taxes) • PDF 417 (Symbol - 1990) • More than 20 different 2D symbologies (2005) In 2003, Missouri started a new era of tax tools In 2004, AL, AZ, OK, MD, LA Our Phylosophy: 1 FORM = 1 BARCODE 2D BARCODES = SAFETY NET 1
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) 1D & 2D BARCODES? 2 ycnadnudeR Datamatrix PDF 3 of 9 417 1D Reading 2D Reading •ECL in form of checksum •ECL in form of codewords •Reads with Laser •Reads with Imager (CCD) •Small capacity •Large capacity(*) •Used as a Key to DB •Portable Database FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) THE WORLD OF 2D BARCODES STACKED TYPE Codablock Code 49 PDF 417 MATRIX TYPE Code 1 Datamatrix QR Code 3di OTHAErrRa yT TYaPgE DataGlyph
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) HOW TO GENERATE 2D BARCODES Libraries • Have to be installed with software application • Software app. has to be developed & maintained Fonts • Have to be installed in the user PC (at least once) • Need a specific encoding algorithm (similar as libraries) PDF Forms • Do not install libraries • Do not install fonts • Leverage a general purpose platform (PDF) FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) HOW TO READ 2D BARCODES Software (needs previous scan to Image) AllMyPapers, IBM IFP, Pegasus, TeleForm (Verity), Seaport, etc. Starting at 1,000$ Hardware (Laser & CCD) Symbol, Datalogic, Metrologic CCD, Laser Starting at 350$ 3
FTA TECHNOLOGY CONFERENCE
August 7-10 | Columbus, OH
2D Barcodes at a Glance
Carlos Gonzalez (Dataintro Software)
PAPER FORMS DATA CAPTURE ALTERNATIVES
OCR, OMR, ICR (Pattern based methods)
EXCEPTION HANDLING
MANUAL HAND KEY (single, double, triple)
BOTH HAVE ERRORS (& FALSE POSITIVES)
2D BARCODES are 100% ERROR FREE
•Less expensive to read (.90 vs .30 )
•No error or false positives
FTA TECHNOLOGY CONFERENCE
August 7-10 | Columbus, OH
2D Barcodes at a Glance
Carlos Gonzalez (Dataintro Software)
Starring PDF 417
PDF= Portable Data File
ISO:IEC 15438 (SYMBOL TECH.)
The basic unit: Mr. Codeword
(a 417 pattern)
23134121
1 BARCODE = 925 MAX DATA CW
4
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) ANATOMY OF A PDF 417 Start Left Row DATA Right R. Stop Pattern Indicator CODEWORDS Indicator Pattern (1-30 columns) 5 ENOZ TEIUQ GNIDAEL ENOZ TEIUQ GNILIART SYMBOL CAPACITY 1,850 TEXT - 1,108 BYTE - 2,710 NUMBER (ECL-0) 2 CharPerCw 1.2 CharPerCw 2.93 CharPerCw 1,726 TEXT - 1,033 BYTE - 2,528 NUMBER (ECL-5 ) min rec FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) ROWS AND COLUMNS ROW 2 COLUMNS OVERHEAD 10 COLUMNS she sells sea shells by the sea shore she sells sea shells by the sea shore (76) Number of COLUMNS is between 1-30 Number of ROWS is between 3-90
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) ECL : Error Correction Level ECL 4 (118 DATA : 32 ECC) ECL 6 (118 DATA : 128 ECC) ECL 8 (118 DATA : 512 ECC) MANUFACTURER RECOMMENDATIONS (SYMBOL): When I find myself in times of trouble Mother Mary comes to Always try to maintain printing me speaking words of wisdom, let it be. And in my hour of quality. darkness She is standing right in front of me speaking words of wisdom, let it be. Let it Do not compensate poor be, let it be (230) printing quality with a raise of ECL FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) RESOLUTION & X:Y RATIO X 1:1 MODULE RESOLUTION (X) 2:1 measured in mils 1 mil = 1/10,000 inch 3:1 4X 3X 2X 4:1 MANUFACTURER RECOMMENDATIONS (SYMBOL): At least minimum recommended ECL: 3x Less than minimum recommended ECL: 4x 6 Y
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) 2D BARCODE PARAMETERS QUANTITY OF DATA COMPRESSED, UNCOMPRESSED AVAILABLE PHYSICAL SPACE AS MUCH AS POSSIBLE AT DESIGN TIME, REDESIGN, SEPARATE SHEET READING METHOD PRINTING ENV. HARD, SOFT, FAX CONTROLLED vs UNCONTROLLED NUM. COLUMNS ECL 1-30 1-8 RESOLUTION X:Y RATIO 10-15 2:1 - 3:1 FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) WHAT’S INSIDE A 2D BARCODE? ALPHANUMERIC DATA
- Static info (owner): DOR ID, Form Version...
- Variable info (owner): Date, Time...
- Control Characters (TAB, CR, F keys)
- Variable info (user): User Data...
- Any Format (CSV,TAB,XML) VALUABLE FORM INFO
- NumChars, TimeToFill, ViewerVersion, etc... 7
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) MACRO PDF417 Up to 99,999 symbols can be chained together and be read as one file Totalling 100+ MB • Macro vs Distributed 2D Barcoding MICRO PDF417 (aka “Truncated”) FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) MULTI PAGE BARCODING OPTIONS 1 BC = 1 Page 1 BC = 1 Form 1 Page for all BCs. Needs 3 Watch print order (what do I sign?) captures DON’T ALLOW THE USER TO PRINT THE FORM PARTIALLY 8
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) 2D BARCODES & ENCRYPTION 2D BARCODES ARE FOR DATA CAPTURE
- What if we cannot read? Controlled vs Uncontrolled (Print env.)
- Sign readable set DATA + KEY = Encrypted DATA Technology = Rsytbwpwyz FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) FAXES & 2D BARCODES • Capture from FAX • Symbol needs more resolution 9
FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) FIND THIS PRESENTATION AT: www.dataintro.com/fta/ send questions to: carlosg@dataintro.com TO KNOW MORE ABOUT 2D BARCODES... WWW.ADAMS1.COM WWW.SYMBOL.COM FTA TECHNOLOGY CONFERENCE August 7-10 | Columbus, OH 2D Barcodes at a Glance Carlos Gonzalez (Dataintro Software) 2D BARCODES AT A GLANCE THANK YOU! 10