Information technology - Automatic identification and data capture techniques - Bar code scanner and decoder performance testing (ISO/IEC 15423:2009)

ISO/IEC 15423:2009 defines the test equipment and procedures to be used to determine the performance of bar code scanning and decoding equipment. It deals with bar code scanning and decoding equipment both as integrated reading systems and as discrete units. It defines performance of the equipment in a particular configuration (e.g. a specific model) irrespective of the individual components used. It also defines in a normative annex operational parameters for the test equipment, and describes, in an informative annex, a means of classifying scanners.

Informationstechnik - Automatische Identifikation und Datenerfassungsverfahren - Leistungsanforderungen an Strichcode-Scanner und -Decoder (ISO/IEC 15423:2009)

Technologies de l'information - Techniques automatiques d'identification et de capture des données - Contrôle de scanner de code à barres et de performance du décodeur (ISO/IEC 15423:2009)

L'ISO/CEI 15423:2009 définit l'équipement et les modes opératoires d'essai à utiliser pour déterminer la performance d'un équipement de balayage et de décodage de codes à barres. Elle s'applique aux équipements de balayage et de décodage de codes à barres, qu'ils se présentent sous forme de systèmes de lecture intégrés ou sous forme d'unités distinctes. Elle définit la performance de l'équipement dans une configuration particulière (par exemple un modèle spécifique) quels que soient les composants individuels utilisés. Elle définit également les paramètres de fonctionnement dans une annexe normative concernant l'équipement d'essai et décrit une méthode de classification des équipements de balayage dans une annexe informative.

Informacijska tehnologija - Tehnike za samodejno razpoznavanje in zajem podatkov - Preskušanje skenerjev in dekodirnikov črtnih kod (ISO/IEC 15423:2009)

Ta mednarodni standard opredeljuje preskusno opremo in postopke za preskušanje opreme za skeniranje in dekodiranje črtnih kod. Obravnava opremo za skeniranje in dekodiranje, integrirano v bralne sisteme, in kot ločene enote. Opredeljuje zmogljivost opreme v določeni konfiguraciji (npr. določen model), ne glede na uporabljene posamične komponente. Prav tako v normativnem dodatku A opredeljuje operativne parametre za opremo za preskušanje ter opisuje sredstva za klasifikacijo skenerjev.

General Information

Status
Published
Publication Date
31-Aug-2010
Withdrawal Date
30-Mar-2011
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
01-Sep-2010
Due Date
30-Oct-2011
Completion Date
01-Sep-2010

Relations

Buy Standard

Standard
EN ISO/IEC 15423:2010
English language
47 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO/IEC 15423:2010
01-november-2010
1DGRPHãþD
SIST EN ISO/IEC 15423:2005
,QIRUPDFLMVNDWHKQRORJLMD7HKQLNH]DVDPRGHMQRUD]SR]QDYDQMHLQ]DMHP
SRGDWNRY3UHVNXãDQMHVNHQHUMHYLQGHNRGLUQLNRYþUWQLKNRG ,62,(&
Information technology - Automatic identification and data capture techniques - Bar code
scanner and decoder performance testing (ISO/IEC 15423:2009)
Informationstechnik - Automatische Identifikation und Datenerfassungsverfahren -
Leistungsanforderungen an Strichcode-Scanner und -Decoder (ISO/IEC 15423:2009)
Technologies de l'information - Techniques automatiques d'identification et de capture
des données - Contrôle de scanner de code à barres et de performance du décodeur
(ISO/IEC 15423:2009)
Ta slovenski standard je istoveten z: EN ISO/IEC 15423:2010
ICS:
35.040 Nabori znakov in kodiranje Character sets and
informacij information coding
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
SIST EN ISO/IEC 15423:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO/IEC 15423:2010

---------------------- Page: 2 ----------------------

SIST EN ISO/IEC 15423:2010


EUROPEAN STANDARD
EN ISO 15423

NORME EUROPÉENNE

EUROPÄISCHE NORM
September 2010
ICS 35.040 Supersedes EN ISO/IEC 15423:2005
English Version
Information technology - Automatic identification and data
capture techniques - Bar code scanner and decoder
performance testing (ISO/IEC 15423:2009)
Technologies de l'information - Techniques automatiques Informationstechnik - Automatische Identifikation und
d'identification et de capture des données - Contrôle de Datenerfassungsverfahren - Leistungsanforderungen an
scanner de code à barres et de performance du décodeur Strichcode-Scanner und -Decoder (ISO/IEC 15423:2009)
(ISO/IEC 15423:2009)
This European Standard was approved by CEN on 12 August 2010.

CEN members are bound to comply with the CEN/CENELEC 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 CEN Management 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 CEN Management Centre has the same status as the
official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15423:2010: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO/IEC 15423:2010
EN ISO/IEC 15423:2010 (E)
Contents Page
Foreword .3

2

---------------------- Page: 4 ----------------------

SIST EN ISO/IEC 15423:2010
EN ISO/IEC 15423:2010 (E)
Foreword
The text of ISO/IEC 15423:2009 has been prepared by Technical Committee ISO/IEC/JTC 1 “Information
technology” of the International Organization for Standardization (ISO) and the International Electrotechnical
Commission (IEC) and has been taken over as EN ISO/IEC 15423:2010 by Technical Committee
CEN/TC 225 “AIDC technologies” the secretariat of which is held 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 March 2011, and conflicting national standards shall be withdrawn at
the latest by March 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO/IEC 15423:2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO/IEC 15423:2009 has been approved by CEN as a EN ISO/IEC 15423:2010 without any
modification.

3

---------------------- Page: 5 ----------------------

SIST EN ISO/IEC 15423:2010

---------------------- Page: 6 ----------------------

SIST EN ISO/IEC 15423:2010

INTERNATIONAL ISO/IEC
STANDARD 15423
Second edition
2009-11-15


Information technology — Automatic
identification and data capture
techniques — Bar code scanner and
decoder performance testing
Technologies de l'information — Techniques automatiques
d'identification et de capture des données — Contrôle de scanner de
code à barres et de performance du décodeur




Reference number
ISO/IEC 15423:2009(E)
©
ISO/IEC 2009

---------------------- Page: 7 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO/IEC 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO/IEC 2009 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Abbreviated terms .5
5 Categories of scanning equipment .5
5.1 Scanners with single-axis reading diagram .6
5.2 Scanners with two-axis reading diagram.6
5.3 Scanners with three-axis reading diagram.6
6 Test requirements .6
6.1 Test methods .6
6.2 Selection of equipment for testing .7
6.3 Test conditions .7
6.4 Test charts .7
6.5 Test equipment .15
6.6 Test criteria .15
6.7 Parameters to be tested and test methods.16
6.8 Test report.26
7 Certification and labelling.26
8 Equipment specification.27
8.1 General .27
8.2 Scanner/decoder interface .28
8.3 Human interface .28
8.4 Computer interface.28
8.5 Digital input and output (I/O).29
8.6 Programming and configuration.29
Annex A (normative) General operational requirements.30
Annex B (informative) Classification of scanners .31
Annex C (informative) Example of decodability calculation.37
Bibliography.39

© ISO/IEC 2009 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO 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. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. 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 of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 15423 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 31, Automatic identification and data capture techniques.
This second edition cancels and replaces the first edition (ISO/IEC 15423:2004), which has been technically
revised.

iv © ISO/IEC 2009 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
Introduction
The technology of bar coding is based on the recognition of patterns encoded in bars and spaces of defined
dimensions or arrangements of marks in matrix patterns both of which are constructed according to rules
defining the translation of characters into such patterns, known as the symbology specification.
Bar code symbols can be produced with a wide variety of printing and other techniques, and the overall
symbol dimensions can be uniformly scaled to suit particular requirements.
There is a wide range of bar code reading equipment using various scanning techniques, which enable bar
code symbols to be read under many different conditions.
Bar code symbols may be
a) “linear” i.e. read in a single dimension, where the height of the bars provides redundancy of information,
or
b) “two dimensional”, either in stacked rows to be read unidimensionally with multiple scans, or as a matrix
of elements requiring two dimensional reading.
Bar code reading equipment must be capable of reliably converting the information represented as a bar code
symbol into a form meaningful to the host computer system or otherwise to the user.
Manufacturers of bar code equipment, the producers of bar code symbols and the users of bar code
technology require publicly available standard test specifications for bar code reading equipment to ensure the
accuracy and consistency of performance of this equipment.

© ISO/IEC 2009 – All rights reserved v

---------------------- Page: 11 ----------------------

SIST EN ISO/IEC 15423:2010

---------------------- Page: 12 ----------------------

SIST EN ISO/IEC 15423:2010
INTERNATIONAL STANDARD ISO/IEC 15423:2009(E)

Information technology — Automatic identification and data
capture techniques — Bar code scanner and decoder
performance testing
1 Scope
This International Standard defines the test equipment and procedures to be used to determine the
performance of bar code scanning and decoding equipment. It deals with bar code scanning and decoding
equipment both as integrated reading systems and as discrete units. It defines performance of the equipment
in a particular configuration (e.g. a specific model) irrespective of the individual components used. It also
defines in a normative annex operational parameters for the test equipment, and describes, in an informative
annex, a means of classifying scanners.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO/IEC 15415, Information technology — Automatic identification and data capture techniques — Bar code
print quality test specification — Two-dimensional symbols
ISO/IEC 15416, Information technology — Automatic identification and data capture techniques — Bar code
print quality test specification — Linear symbols
ISO/IEC 15417, Information technology — Automatic identification and data capture techniques — Code 128
bar code symbology specification
ISO/IEC 15424, Information technology — Automatic identification and data capture techniques — Data
Carrier Identifiers (including Symbology Identifiers)
ISO/IEC 15426-1, Information technology — Automatic identification and data capture techniques — Bar code
verifier conformance specifications — Part 1: Linear symbols
ISO/IEC 15426-2, Information technology — Automatic identification and data capture techniques — Bar code
verifier conformance specification — Part 2: Two-dimensional symbols
ISO/IEC 15438 Information technology — Automatic identification and data capture techniques — PDF417
bar code symbology specification
ISO/IEC 16022 Information technology — Automatic identification and data capture techniques — Data Matrix
bar code symbology specification
ISO/IEC 16388, Information technology — Automatic identification and data capture techniques — Code 39
bar code symbology specification
ISO/IEC 19762-1, Information technology — Automatic identification and data capture (AIDC) techniques —
Harmonized vocabulary — Part 1: General terms relating to AIDC
© ISO/IEC 2009 – All rights reserved 1

---------------------- Page: 13 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
ISO/IEC 19762-2, Information technology — Automatic identification and data capture (AIDC) techniques —
Harmonized vocabulary — Part 2: Optically readable media (ORM)
ISO/IEC 24723, Information technology — Automatic identification and data capture techniques — EAN.UCC
Composite bar code symbology specification
ISO/IEC 24724, Information technology — Automatic identification and data capture techniques — Reduced
Space Symbology (RSS) bar code symbology specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 19762 and the following apply.
3.1
contact scanner
particular type of scanner in which the scanning action takes place with the scanner in actual or near contact
with the symbol, e.g. wand or light pen
3.2
decode redundancy
acquisition of a predetermined number of identical decodes before acceptance by a decoder of a valid decode
EXAMPLE Decode redundancy of 2 requires two identical decodes.
3.3
exit window
datum point from which the reading diagram is measured, positioned on the beam midpoint and closest to the
reading end of the scanner
3.4
maximum reading distance
distance from the exit window to the end of the depth of field
NOTE See R in Figure 2.
3.5
minimum reading distance
distance from the exit window to the beginning of the depth of field
NOTE See A in Figure 2.
3.6
raster distance
distance between the two most widely spaced adjacent scan lines projected on a plane at a defined distance
from the scanner exit window
NOTE See E in Figure B.3.
3.7
raster width
distance between the two outermost scan lines projected on a plane at a defined distance from the scanner
exit window
NOTE This covers a reading field which depends on the construction of the scanner and on the reading distance.
See D in Figure B.3.
2 © ISO/IEC 2009 – All rights reserved

---------------------- Page: 14 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
3.8
reading angle
angular rotation of a symbol in an axis relative to a scan line
NOTE Three different reading angles, tilt, skew and pitch are illustrated in Figure 1. Tilt refers to rotation around the z
axis, skew to rotation around the x axis and pitch to rotation around the y axis.
tilt skew pitch
X Axis
Y Axis
Z Axis

Figure 1 — Reading angles
3.9
reading diagram
graphical representation of the reading zone for a specific X dimension (or other parameters) of the bar code
symbol
NOTE The parameters of the reading diagram are:
⎯ measurements made from the exit window of the reader;
⎯ reading distance, measured on the z axis;
⎯ X dimension (in mm);
⎯ skew, tilt and pitch angles;
⎯ symbol contrast value;
⎯ ambient light level; and
⎯ symbology.
See Annex B.
3.10
reading zone
whole region (line, area or volume) in front of the exit window of a non-contact scanner in which defined
symbols can be read
NOTE See zone MNOP in Figure 2.
© ISO/IEC 2009 – All rights reserved 3

---------------------- Page: 15 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)


O
Two-axis
Scanner
N
C
M
P
A
B
R
Reading zone

Figure 2 — Example of reading zone (MNOP)
NOTE Certain application requirements, for example in automated conveyor scanning systems, may restrict the
effective reading zone to that shown in Figure 3 (MNO’P’).


Two-axis
Scanner
N
O’

M
P’
A B
R
Restricted reading zone

Figure 3 — Example of restricted reading zone (MNO’P’)
4 © ISO/IEC 2009 – All rights reserved

---------------------- Page: 16 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
3.11
resolution
width of the narrowest element capable of being read by the scanner equipment under test conditions
3.12
scan, noun
single pass of the scanning beam over the symbol or a portion of the symbol, or a single image capture with
an image capture device
scan, verb
to pass the scanning beam over the symbol or a portion of the symbol, or to capture a single image with an
image capture device
3.13
scan attempt
single pass of the scanner relative to the symbol (or vice versa), or a single activation of the scanner, e.g.
triggering, for a period not exceeding two seconds or a time period specified by the manufacturer
3.14
scanning rate
number of times the bar code symbol is scanned per second, expressed in scans per second, or scan lines
per second
3.15
scanning speed
speed at which the scanning spot of a scanner with a single axis reading diagram is passed across a bar code
symbol
3.16
X axis
direction parallel to the motion of the scan beam, nominally perpendicular to the bars of a linear symbol
3.17
Y axis
direction perpendicular to the motion of the scan beam, nominally parallel to the bars of a linear symbol
3.18
Z axis
direction from the exit window to the symbol, nominally normal to the plane of the symbol
4 Abbreviated terms
CCD Charge Coupled Device
CMOS Complementary Metal Oxide Semiconductor
LED Light Emitting Diode
5 Categories of scanning equipment
In order to enable the most appropriate set of tests for a given scanning device or unit to be selected,
scanners are grouped for the purposes of this International Standard into three categories. The basis for this
categorisation is the nature of the reading diagram applicable. Examples of various types of scanners are
given in Annex B. Each category may be further subdivided into ‘continuously operating’ scanners, in which
the scanning operation is already in progress when the symbol enters the reading zone, and ‘triggered’
scanners, where the symbol is already in the reading zone when the scanning operation is initiated.
© ISO/IEC 2009 – All rights reserved 5

---------------------- Page: 17 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
5.1 Scanners with single-axis reading diagram
These are defined as scanners with a reading diagram which extends as a single line from the exit window of
the scanner to the maximum reading distance along the z axis. The scanning action therefore has to be
created by moving either the scanner or the symbol relative to the other in a direction nominally perpendicular
to the height of the bars.
The reading diagram for such scanners can be represented as a single line extending outwards from the exit
window of the scanner. See Figure B.1.
5.2 Scanners with two-axis reading diagram
These are defined as scanners with a reading diagram which extends in a single plane from the exit window of
the scanner to the maximum reading distance along the z axis and perpendicularly in both directions along the
x axis. The scanning action is created either by sweeping the scanner beam across the symbol in a direction
nominally perpendicular to the height of the bars, or by electronically sampling in turn individual elements of a
photosensitive array on which an image of the bar code symbol is focussed.
The reading diagram for such scanners can be represented in a two-dimensional form. See Figure B.2.
5.3 Scanners with three-axis reading diagram
These are defined as scanners with a reading diagram which extends from the exit window of the scanner to
the maximum reading distance along the z axis, and perpendicularly to this in both directions along the x and
y axes which are also perpendicular to each other.
The reading diagram for such scanners is the representation of a three-dimensional solid.
5.3.1 Multi-line scanners
The scanning action is created either by sweeping the scanner beam across the symbol in a series of
nominally parallel scans in a direction nominally perpendicular to the height of the bars, see Figure B.3 or in a
pattern of scan lines at various angles, or multi-window scanners, see Figure B.5.
5.3.2 Image scanners
The scanning action is created by electronically sampling in turn individual photosensitive elements of an area
array on which an image of the bar code symbol is focussed; see Figure B.4.
6 Test requirements
6.1 Test methods
Manufacturers’ test procedures should be in accordance with the requirements of ISO 9001.
Tests should wherever possible be carried out on a complete reading system comprising both scanner and
decoder.
Where it is required to report the performance of a scanner or a decoder independently, the unit shall be
tested in conjunction with one or more representative decoder or scanner unit(s) respectively, but only the
parameters relative to scanning or decoding performance, as applicable, shall be reported. The decoder or
scanner units used shall be reported with the test results.
Manufacturers may optionally test scanner or decoder performance independently using the equipment
defined in 6.5.4.1 or 6.5.4.2 but it should be noted that the results may not correspond exactly to those
obtained when tested as a complete system.
6 © ISO/IEC 2009 – All rights reserved

---------------------- Page: 18 ----------------------

SIST EN ISO/IEC 15423:2010
ISO/IEC 15423:2009(E)
6.2 Selection of equipment for testing
Tests shall be carried out on at least one unit which has been selected from a production batch in accordance
with the manufacturer's quality control sampling scheme.
NOTE It is in the manufacturer's interest to ensure that the unit selected is representative of its type. Guidance on
sampling is given in ISO 2859-1.
6.3 Test conditions
6.3.1 Environment
Tests shall be conducted under manufacturer-specified environmental conditions (power supply, temperature,
relative humidity and ambient light conditions) and the test conditions shall be recorded as part of the test
report.
Test charts to be used shall have been stored under the temperature and humidity conditions specified for a
sufficient time to ensure their dimensional stability during the test period.
6.3.2 Equipment configuration
The following information on the installation of the equipment under test shall be recorded:
⎯ description of configuration, including type/model of scanner and decoder, and other Physical
conditions, e.g. type of interface, etc.;
⎯ logical conditions such as the type of output by the scanner, or sent to the decoder e.g. analogue
waveform, digital output (where a scanner or decoder is being tested rather than a complete reader).
6.4 Test charts
Test charts should be produced on dimensionally stable materials with image characteristics which are
consistent within the image or symbol area used for the test. As an example, Kodak Kodagraph Continuous
Tone White Film (CTW7) is one material that has been found to be suitable when backed with a black opaque
material to minimize the effects of show-through.
When equipment which is unable to process any of the symbologies in the test charts is to be tested, an
equivalent set of test symbols in another appropriate symbology should be used. When other symbologies are
being used, certain parameters may require to be modified to comply with the parameters of the symbology
specification, e.g. row height or wide-to-narrow ratio.
When selecting materials for this use it is important to consider:
⎯ high dimensional stability
⎯ high substrate opacity (minimized show-through)
⎯ high consistency of substrate surface reflectance
⎯ bars (regions of low re
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.