INTERNATIONAL ISO/IEC STANDARD 18004

1 Reference numberISO/IEC 18004 :2000(E) ISO/IEC 2000 INTERNATIONALSTANDARDISO/IEC18004 First edition2000-06-15 Information technology Automaticidentification and data capturetechniques Bar code symbology QRCodeTechnologies de l'information Techniques d'identification automatique etde capture de donn es Symboles de codes barres Code QRLicensed to SCANBUY, MUNIISO Store order #:762844/Downloaded:2006-08-01 Single user licence only, copying and networking prohibitedISO/IEC 18004 :2000(E)PDF disclaimerThis PDF file may contain embedded typefaces.

2 In accordance with Adobe's licensing policy, this file may be printed or viewed but shall notbe edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading thisfile, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in is a trademark of Adobe Systems of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameterswere optimized for printing.

3 Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely eventthat a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member bodyin the country of the copyright officeCase postale 56 CH-1211 Geneva 20 Tel.

4 + 41 22 749 01 11 Fax + 41 22 749 09 47E-mail in Switzerlandii ISO/IEC 2000 All rights reservedLicensed to SCANBUY, MUNIISO Store order #:762844/Downloaded:2006-08-01 Single user licence only, copying and networking prohibitedISO/IEC 18004 :2000(E) ISO/IEC 2000 All rights ..vi1 Scope .. 13 normative references .. 14 Terms and definitions .. 25 Symbols (and abbreviated terms) .. 36 Conventions .. positions .. notation .. 47 Symbol description .. characteristics .. of additional features .. structure .. Versions and sizes.

5 Patterns .. 138 Requirements .. procedure analysis .. Channel Interpretation (ECI) Mode .. Mode .. Mode .. Byte Mode .. modes .. Append Mode .. encodation .. Channel Interpretation (ECI) Mode .. Mode .. Mode .. Byte Mode .. modes .. Modes .. stream to codeword correction capacity .. the error correction codewords .. the final message codeword sequence .. 45 Licensed to SCANBUY, MUNIISO Store order #:762844/Downloaded:2006-08-01 Single user licence only, copying and networking prohibitedISO/IEC 18004 :2000(E)iv ISO/IEC 2000 All rights placement in character pattern character placement.

6 Of masking results .. Information .. Information ..549 Structured Append .. principles .. Sequence data ..5610 Symbol printing and marking .. guidelines ..5711 Symbol quality .. the test image .. quality parameters .. Decode .. Symbol Contrast .. "Print" growth .. Axial Unused Error symbol grade .. control measurements ..5912 Decoding procedure overview ..5913 Reference decode algorithm for QR Code ..6014 Autodiscrimination data .. Identifier .. Channel Interpretations .. A( normative )Error detection and correction generator polynomials.

7 67 Annex B( normative )Error correction decoding steps ..74 Annex C( normative )Format Information ..76 Annex D( normative )Version Information ..78 Annex E( normative )Position of Alignment F( normative )Symbology G(informative)Symbol encoding H(informative)Optimisation of bit stream I(informative)User guidelines for printing and scanning of QR Code J(informative)Autodiscrimination ..90 Annex K(informative)Matrix code print quality L(informative)Process control techniques ..95 Annex M(informative)Characteristics of Model 1 QR Code to SCANBUY, MUNIISO Store order #:762844/Downloaded:2006-08-01 Single user licence only, copying and networking prohibitedISO/IEC 18004 :2000(E) ISO/IEC 2000 All rights reservedvForewordISO (the INTERNATIONAL Organization for Standardization) and IEC (the INTERNATIONAL Electrotechnical Commission)form the specialized system for worldwide standardization.

8 National bodies that are members of ISO or IECparticipate in the development of INTERNATIONAL standards through technical committees established by therespective organization to deal with particular fields of technical activity. ISO and IEC technical committeescollaborate in fields of mutual interest. Other INTERNATIONAL organizations, governmental and non-governmental, inliaison with ISO and IEC, also take part in the standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part the field of information technology, ISO and IEC have established a joint technical committee.

9 ISO/IEC JTC INTERNATIONAL standards adopted by the joint technical committee are circulated to national bodies for as an INTERNATIONAL STANDARD requires approval by at least 75 % of the national bodies casting a is drawn to the possibility that some of the elements of this INTERNATIONAL STANDARD may be the subject ofpatent rights. ISO and IEC shall not be held responsible for identifying any or all such patent STANDARD ISO/IEC 18004 was prepared by Joint Technical Committee ISO/IEC JTC 1,Informationtechnology, Subcommittee SC 31,Automatic identification and data capture techniques, in collaboration with ).

10 Annexes A to F form a normative part of this INTERNATIONAL STANDARD . Annexes G to M are for information ) AIM Inc., 634 Alpha Drive, Pittsburgh, PA 15238-2802, to SCANBUY, MUNIISO Store order #:762844/Downloaded:2006-08-01 Single user licence only, copying and networking prohibitedISO/IEC 18004 :2000(E)vi ISO/IEC 2000 All rights reservedIntroductionQR Code is a matrix symbology consisting of an array of nominally square modules arranged in an overall squarepattern, including a unique finder pattern located at three corners of the symbol and intended to assist in easylocation of its position, size and inclination.