1、BRITISH STANDARD Information technology Automatic identification and data cap ture technique s Bar code print quality test specification Linear symbols The European Standard EN ISO/IEC 15416:2001 has the status of a British Standard ICs 35.040; 01.080.50 BS EN ISOLEC 154 1 6:2002 Incorporating Corri
2、gendum No. I Wk present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented o
3、n this committee can be obtained on request to its secretary. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondenc
4、e Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of its
5、elf confer immunity from legal obligations. 19 April 2002 EN ISO/IEC title page and foreword corrected I I O BSI 19 April 2002 ISBN O 580 39107 8 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISOAEC 15416 December 2001 ICs 01.080.50; 35.040 Supersedes EN 16351 997 English version Information
6、technology - Automatic identification and data capture techniques - Bar code print quality test specification - Linear symbols (ISOAEC 1541 6:2000) Technologies de linformation - Techniques didentification automatique et de capture des donnes - Spcifications pour essai de qualit dimpression des code
7、s barres - Symboles linaires (ISOAEC 15416:2000) Informationstechnik - Verfahren der automatischen Identifikation und Datenerfassung - Testspezifikationen fr Strichcodedruckqualitt, Lineare Symbole (ISOAEC 15416:2000) This European Standard was approved by CEN on 20 October 2001. CEN members are bou
8、nd to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Ma
9、nagement Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as th
10、e official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
11、 EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISOAEC 15416:2001 E EN ISODEC 15416:2001 I CORRECTED 2002-
12、03-27 I Foreword The text of the International Standard from Technical Committee ISO/IEC/JTC 1 “Information technology“ of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 225 “Bar coding“, the secretariat of which is h
13、eld by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest by June 2002. This document supersedes EN 1635:1997. Acco
14、rding to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal
15、, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO/IEC 15416:2000 has been approved by CEN as a European Standard without any modifications. EN ISODEC 15416:2001 INTERNATIONAL ISO/IEC STANDARD 1541 6 First edition 2000-08-1 5 Informatio
16、n technology - Automatic identification and data capture techniques - Bar code print quality test specification - Linear symbols Technologies de Iinformafion - Techniques didenfificafion aufomafique ef de capfure des donnes - Spcificafions pour essai de qualif dimpression des codes barres - Symboles
17、 linaires Reference number ISOAEC 15416:2000(E) EN ISODEC 15416:2001 II EN ISODEC 15416:2001 Contents Page Foreword . vi Introduction . vi 1 2 3 4 4.1 4.2 5 5.1 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.3 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.4.7 5.4.8 5.4.9 5.4.1 O 6 6.1 6.1 . 1 6.1.2 6.1.3 6.2 7 Sco
18、pe 1 Normative references 1 Terms and definitions . 1 Symbols and abbreviated terms 3 Abbreviations . 3 Symbols 3 Measurement methodology 4 General requirements 4 Reference reflectivity measurements 5 Measurement wavelength(s) . 5 Measuring aperture 5 Optical geometry 6 Inspection band . 7 Number of
19、 scans 7 Scan reflectance profile 7 Scan reflectance profile assessment parameters 8 Element determination 9 Edge determination . 9 Decode 10 Symbol contrast (SC) 10 Minimum reflectance (R . ) 10 Edge contrast (EC) . IO Modulation (MOD) IO Defects 10 Decodability 10 Quiet zone check . 11 Symbol grad
20、ing 12 Scan reflectance profile grading 12 Decode 12 Reflectance parameter grading 12 Decodability 13 Expression of symbol grade . 13 Substrate characteristics 13 min Annex A (normative) Decodability . 14 A.l Two-width symbologies 14 A.2 Edge to similar edge decodable symbologies (n. k) symbologies)
21、 14 Annex B (normative) Example of symbol quality grading 16 B.l Individual scan reflectance profile grading 16 B.2 Overall symbol grade 17 Annex C (informative) Symbol grading flowchart 18 Annex D (informative) Substrate characteristics . 19 D.l Substrate opacity . 19 D.2 Gloss . 19 D.3 Over-lamina
22、te . 19 . 111 EN ISODEC 15416:2001 D.4 D.4.1 D.4.2 D.4.3 Annex E (informative) Interpretation of the scan reflectance profile and profile grades . 23 E.l E.2 Interpretation of results . 23 E.3 Matching grades to applications 24 Static reflectance measurements . 19 Prediction of Symbol Contrast (SC)
23、. 20 Prediction of Minimum Edge Contrast (ECmi, ) and Modulation (MOD) . 20 Acceptability of measured and derived values . 22 Significance of scan reflectance profiles 23 E.4 Alphabetic grading 25 Annex F (informative) Guidance on selection of light wavelength 26 F.l Light sources 26 F.2 Effect of v
24、ariations in wavelength 27 Annex G (informative) Guidance on number of scans per symbol 28 Annex H (informative) Example of verification report . 29 Annex I (informative) Comparison with traditional methodologies . 30 1.1 Traditional methodologies 30 1.2 Correlation of Print Contrast Signal with sym
25、bol contrast measurements . 30 1.3 Annex J (informative) Process control requirements 32 J.l J.2 J.3 J.3.1 Two-width symbologies 33 J.3.2 (n, k) symbologies . 33 J.3.3 Bibliography 34 Guidance on grading for applications also specifying PCS . 31 Process control for repetitive printing 32 Number of s
26、cans 32 Bar width deviation 33 Average bar width gainlloss . 33 iv EN ISODEC 15416:2001 Foreword IS0 (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are member
27、s of IS0 or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. IS0 and IEC technical committees collaborate in fields of mutual interest. Other international organ
28、izations, governmental and non-governmental, in liaison with IS0 and IEC, also take part in the work. International Standards are drafted in accordance with the rules given in the ISOAEC Directives, Part 3. In the field of information technology, IS0 and IEC have established a joint technical commit
29、tee, ISOAEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some o
30、f the elements of this International Standard may be the subject of patent rights. IS0 and IEC shall not be held responsible for identifying any or all such patent rights. International Standard ISOAEC 1541 6 was prepared by Joint Technical Committee ISOAEC JTC 1, lnforrnafion fechnology, Subcommitt
31、ee SC 31, Aufornafic ienfificafion and afa capfure fechniques. Annexes A and B form a normative part of this International Standard. Annexes C to J are for information only. V EN ISODEC 15416:2001 I n t rod uct i on The technology of bar coding is based on the recognition of patterns encoded in bars
32、 and spaces of defined dimensions according to rules defining the translation of characters into such patterns, known as the symbology specification. The bar code symbol must be produced in such a way as to be reliably decoded at the point of use, if it is to fulfil its basic objective as a machine
33、readable data carrier. Manufacturers of bar code equipment and the producers and users of bar code symbols therefore require publicly available standard test specifications for the objective assessment of the quality of bar code symbols, to which they can refer when developing equipment and applicat
34、ion standards or determining the quality of the symbols. Such test specifications form the basis for the development of measuring equipment for process control and quality assurance purposes during symbol production as well as afterwards. The performance of measuring equipment is the subject of a se
35、parate International Standard, ISO/IEC 15426. This International Standard is intended to be substantially equivalent in technical content to EN 1635 and ANSI standards X3.182 - 1990 and ANSI/UCC5 on which it has been based. It should be read in conjunction with the symbology specification applicable
36、 to the bar code symbol being tested, which provides symbology-specific detail necessary for its application. There are currently many methods of assessing bar code quality at different stages of symbol production. The methodology provided in this specification is not intended as a replacement for a
37、ny current process control methods but gives essential additional quality information. This methodology provides a basis for grading the quality of bar code symbols in relation to their expected performance when read and therefore gives symbol producers and their trading partners a universally stand
38、ardized means for communicating about the quality of bar code symbols after they have been printed. It also provides symbol producers with information enabling them to adjust their production process. Alternative methods of quality assessment may be agreed between parties or as part of an applicatio
39、n specification. vi EN ISODEC 15416:2001 Information technology - Automatic identification and data capture techniques - Bar code print quality test specification - Linear symbols 1 Scope This International Standard - specifies the methodology for the measurement of specific attributes of bar code s
40、ymbols; - defines a method for evaluating these measurements and deriving an overall assessment of symbol quality; - gives information on possible causes of deviation from optimum grades to assist users in taking appropriate corrective action. This International Standard applies to those symbologies
41、 for which a reference decode algorithm has been defined, and which are intended to be read using linear scanning methods, but its methodology can be applied partially or wholly to other symbologies. 2 Normative references The following normative documents contain provisions which, through reference
42、 in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying
43、the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 7724-2: 1984, Painfs and varnishes - Colorimefry -
44、Par 2: Colour measuremenf. EN 1556: 1998, Bar coding - Terminology. 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in EN 1556 and the following apply. 3.1 bar A dark element corresponding to a region of a scan reflectance profile below the gl
45、obal threshold. 3.2 bar reflectance The lowest reflectance value of an individual bar element in the scan reflectance profile of that element. 1 EN ISODEC 15416:2001 3.3 decodability The proportion of the available margin (between the ideal dimension of an element or combination of elements and the
46、relevant reference threshold) that has not been consumed by the element or combination of elements, calculated for the element or combination of elements deviating most from its ideal dimension. 3.4 decode Determination of the information encoded in a bar code symbol. 3.5 edge contrast The differenc
47、e between bar reflectance and space reflectance of two adjacent elements. 3.6 element reflectance non-uniformity The reflectance difference between the highest peak and the lowest valley in the scan reflectance profile of an individual element or quiet zone. 3.7 global threshold The reflectance leve
48、l midway between the maximum and minimum reflectance values in a scan reflectance profile used for the initial identification of elements. 3.8 The propensity of a surface to reflect a proportion of incident light in a specular manner. gloss 3.9 inspection band The band (usually from 10 % to 90 % of
49、the height of a bar code symbol) across which measurements are taken (see Figure 2). 3.10 measuring aperture A circular opening which governs the effective sample area of the symbol, and the diameter of which at 1:l magnification is equal to that of the sample area. 3.1 1 modulation The ratio of minimum edge contrast to symbol contrast. 3.12 (n, k) symbology A class of bar code symbologies in which each symbol character is n modules in width and is composed of k bar and space pairs. 3.13 peak A point of higher reflectance in a scan reflectance profile with poi
