1、BSI Standards Publication BS ISO/IEC 15426-2:2015 Information technology Automatic identification and data capture techniques Bar code verifier conformance specification Part 2: Two-dimensional symbolsBS ISO/IEC 15426-2:2015 BRITISH STANDARD National foreword This British Standard is the UK implemen
2、tation of ISO/IEC 15426-2:2015. The UK participation in its preparation was entrusted to Technical Committee IST/34, Automatic identification and data capture techniques. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purp
3、ort to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 73725 1 ICS 35.040 Compliance with a British Standard cannot confer immunity from legal obligat
4、ions. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2015. Amendments issued since publication Date Text affectedBS ISO/IEC 15426-2:2015 Information technology Automatic identification and data capture techniques Bar code verifi
5、er conformance specification Part 2: Two-dimensional symbols Technologies de linformation Techniques automatiques didentification et de capture des donnes Spcifications de conformit des vrificateurs de codes barres Partie 2: Symboles bidimensionnels INTERNATIONAL STANDARD ISO/IEC 15426-2 Reference n
6、umber ISO/IEC 15426-2:2015(E) Second edition 2015-08-01 ISO/IEC 2015 BS ISO/IEC 15426-2:2015ii ISO/IEC 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utiliz
7、ed otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright
8、 office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO/IEC 15426-2:2015(E)BS ISO/IEC 15426-2:2015ISO/IEC 15426-2:2015(E)Foreword iv Introduction v 1 Scope . 1 2 Conformance . 1 3 Normative references 1 4 Ter
9、ms and definitions . 2 5 Symbols 2 6 Functional requirements . 2 6.1 General requirements . 2 6.2 Reflectance calibration . 2 6.3 Mandatory functions 3 6.3.1 Verifiers for multi-row bar code symbols 3 6.3.2 Verifiers for two-dimensional matrix symbols 3 6.4 Optional functions 3 7 General constructio
10、nal and operational requirements . 4 7.1 Installation, operation and maintenance . 4 7.2 Power supply 4 7.3 Temperature 4 7.3.1 Operating temperature range . 4 7.3.2 Storage temperature range . 4 7.4 Humidity . 4 7.5 Ambient light immunity 4 8 Test requirements . 4 8.1 Test methods . 4 8.1.1 Selecti
11、on of equipment for testing . 5 8.1.2 Scanning parameters 5 8.1.3 Test measurements 5 8.2 Test environment 5 8.3 Primary reference test symbols . 5 8.4 Test report . 6 9 Certification and labelling 6 10 Equipment specification . 6 Annex A (normative) Primary reference test symbols 8 Annex B (normati
12、ve) Verification requirements for primary reference test symbols 13 Bibliography .14 ISO/IEC 2015 All rights reserved iii Contents PageBS ISO/IEC 15426-2:2015ISO/IEC 15426-2:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodi
13、es (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations
14、, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further
15、maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
16、 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introd
17、uction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to c
18、onformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Autom
19、atic identification and data capture techniques. This second edition cancels and replaces the first edition (ISO/IEC 15426-2:2005), which has been technically revised. It also incorporates the Technical Corrigendum ISO/IEC 15426-2:2005/Cor1:2008. ISO/IEC 15426 consists of the following parts, under
20、the general title Information technology Automatic identification and data capture techniques Bar code verifier conformance specification: Part 1: Linear symbols Part 2: Two-dimensional symbolsiv ISO/IEC 2015 All rights reservedBS ISO/IEC 15426-2:2015ISO/IEC 15426-2:2015(E) Introduction The technolo
21、gy of bar coding is based on the recognition of patterns encoded, in bars and spaces or in a matrix of modules of defined dimensions, according to rules defining the translation of characters into such patterns, known as the symbology specification. Symbology specifications may be categorised into l
22、inear symbols, on the one hand, and two-dimensional symbols on the other; the latter may in turn be sub-divided into multi-row bar codes sometimes referred to as “stacked bar codes”, and “two- dimensional matrix codes”. Multi-row bar codes are constructed graphically as a series of rows of symbol ch
23、aracters, representing data and overhead components, placed in a defined vertical arrangement to form a (normally) rectangular symbol, which contains a single data message. Each row of the symbol has the characteristics of a linear bar code symbol and may be read by linear symbol scanning techniques
24、. Two-dimensional matrix symbols are usually rectangular arrangements of modules placed at the intersections of a grid of two (sometimes more) axes; the coordinates of each module need to be known in order to determine its significance, and the symbol must therefore be analysed two-dimensionally bef
25、ore it can be decoded. Unless the context requires otherwise, the term “symbol” in this International Standard may refer to either type of symbology. The symbol, as a machine-readable data carrier, must be produced in such a way as to be reliably decoded at the point of use, if it is to fulfil its b
26、asic objective. Standard methodologies have been developed for measuring and assessing the quality of symbols for process control and quality assurance purposes during symbol production as well as afterwards. Manufacturers of bar code equipment, the producers of bar code symbols and the users of bar
27、 code technology require publicly available standard conformance specifications for measuring equipment applying these methodologies, to ensure the accuracy and consistency of performance of this equipment. This International Standard is intended to be similar in technical content (mutatis mutandis)
28、 to ISO/IEC 15426-1 (the linear bar code verifier conformance standard), on which it has been based. It is intended to be read in conjunction with the symbology specification applicable to the bar code symbol being tested, which provides symbology-specific detail necessary for its application. ISO/I
29、EC 2015 All rights reserved vBS ISO/IEC 15426-2:2015BS ISO/IEC 15426-2:2015Information technology Automatic identification and data capture techniques Bar code verifier conformance specification Part 2: Two-dimensional symbols 1 Scope This part of ISO/IEC 15426 defines test methods and minimum accur
30、acy criteria applicable to verifiers using the methodologies of ISO/IEC 15415 for multi-row bar code symbols and two-dimensional matrix symbologies, and specifies reference calibration standards against which these should be tested. This part of ISO/IEC 15426 provides for testing of representative s
31、amples of the equipment. NOTE ISO/IEC 15426-1 applies to verifiers for linear bar code symbols. 2 Conformance The instrument shall be considered to conform with this part of ISO/IEC 15426 if it performs the functions defined in 6.3 and if the results of measurements of primary reference test symbols
32、 carried out in accordance with Clause 8 demonstrate that the arithmetic means of the 10 measurements (for multi-row bar code symbols) or five measurements (for two-dimensional matrix symbols) of individual reported parameters are within the tolerances shown in Table 1 below. Table 1 Tolerances for
33、measured parameter values Parameter Symbology type Tolerance R maxand/or R s Both 5 % reflectance R minand/or R b Both 3 % reflectance UEC Both 0,0 Decodability Multi-row 0,08 Defects Multi-row 0,08 Codeword Yield Multi-row 0,08 Grid Nonuniformity Matrix 0,06 Axial Nonuniformity Matrix 0,02 Contrast
34、 Uniformity (Mod- ulation) Matrix 0,08 of the MOD value described in A.3.2 Fixed Pattern Damage Matrix Within calibrated grade boundaries NOTE The tolerances in Table 1 are additional to any tolerances stated by the supplier of the primary reference test symbols. 3 Normative references The following
35、 documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. INTERNATIONAL ST AND
36、ARD ISO/IEC 15426-2:2015(E) ISO/IEC 2015 All rights reserved 1BS ISO/IEC 15426-2:2015ISO/IEC 15426-2:2015(E) ISO/IEC 15415, Information technology Automatic identification and data capture techniques Bar code symbol print quality test specification Two-dimensional symbols ISO/IEC 15416, Information
37、technology Automatic identification and data capture techniques Bar code symbol quality test specifications Linear symbols ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-2,
38、 Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 2: Optically readable media (ORM) 4 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 15415, ISO/IEC 19762-1, ISO/IEC 19762-2 and the follo
39、wing apply. 4.1 primary reference test symbol bar code symbol intended for the testing of the accuracy of bar code verifiers and manufactured to close tolerances, of at least ten times the precision listed in Table 1, by methods traceable to national standards 5 Symbols R b Bar Reflectance, as defin
40、ed in ISO/IEC 15416 R max Maximum reflectance, as defined in ISO/IEC 15416 R min Minimum reflectance, as defined in ISO/IEC 15416 R s Space Reflectance, as defined in ISO/IEC 15416 6 Functional requirements 6.1 General requirements The general requirement of a two-dimensional symbol verifier is that
41、 it shall provide assessments of the quality of a bar code symbol which are accurate and consistent, both in relation to measurements of a specific symbol made with the same instrument over a period of time and in relation to measurements of a specific symbol made by different instruments. Such cons
42、istency is essential to enable valid comparisons to be made of assessments of a symbol verified at two different times or on two different instruments. 6.2 Reflectance calibration Verifiers shall have means of calibration and adjustment where necessary of reflectance values against reference reflect
43、ance calibration samples. Two calibration points should be used, one as near the high reflectance end of the range and the other as near the low reflectance end of the range as possible. ISO/IEC 15415 defines the reference reflectance material against which these samples shall be calibrated.2 ISO/IE
44、C 2015 All rights reservedBS ISO/IEC 15426-2:2015ISO/IEC 15426-2:2015(E) 6.3 Mandatory functions 6.3.1 Verifiers for multi-row bar code symbols A verifier for multi-row bar code symbols applying the methodology defined in ISO/IEC 15415 shall be capable of: collecting reflectance measurements from po
45、ints along multiple scan paths across a bar code symbol; establishing scan reflectance profiles from these measurements; analysing the scan reflectance profiles; reporting individual scan reflectance profile parameter grades and profile grades; reporting the Codeword Yield value and grade; reporting
46、 the Unused Error Correction value and grade; determining and reporting an overall symbol grade; reporting the decoded data. 6.3.2 Verifiers for two-dimensional matrix symbols A verifier for two-dimensional matrix symbols applying the methodology defined in ISO/IEC 15415 shall be capable of: collect
47、ing reflectance measurements from a sample area framing the test symbol and its quiet zones, extending for certain symbol sizes 20X beyond the quiet zones (see Clause 10); establishing a reference grey-scale image and a binarised image as described in ISO/IEC 15415; decoding these images in accordan
48、ce with the applicable reference decode algorithm; reporting individual values and grades for each of the parameters listed in ISO/IEC 15415; determining and reporting an overall symbol grade; appending an asterisk to the reported overall symbol grade, for certain symbol sizes, under the additional
49、reflectance check provisions of ISO/IEC 15415; reporting the decoded data. The method of reporting is not specified but may be by means of, for example, a display screen in the instrument, a printed report, or electronic communication with another device such as a computer. 6.4 Optional functions Users of verifiers have differing requirements for the amount of detail reported by the instrument, and a verifier may there
