1、BSI Standards PublicationBS ISO 12653-3:2014Electronic imaging Testtarget for scanning of officedocumentsPart 3: Test target for use in lowerresolution applicationsBS ISO 12653-3:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12653-3:2014.The UK participa
2、tion in its preparation was entrusted to TechnicalCommittee IDT/1, Document Management Applications.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are respo
3、nsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 78791 1ICS 37.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Pol
4、icy and Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS ISO 12653-3:2014 ISO 2014Electronic imaging Test target for scanning of office documents Part 3: Test target for use in lower resolution applicationsImagerie lectronique Cible dessai pour le scanning
5、en noir et blanc des documents de bureau Partie 3: Applications plus faible rsolutionINTERNATIONAL STANDARDISO12653-3First edition2014-04-01Reference numberISO 12653-3:2014(E)BS ISO 12653-3:2014ISO 12653-3:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved
6、. Unless otherwise specified, no part of this publication may be reproduced or utilized 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
7、 the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 12653-3:2014ISO 12653-3:2014(E) ISO 2014 All rights reserved iii
8、Contents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Uses of this part of ISO 12653 . 24.1 General . 24.2 Factors affecting quality 25 Test target 25.1 General . 25.2 Description of the test elements 25.3 Base . 65.4 Test target for duplex scanners 76
9、 Procedures 76.1 Initial system set-up . 76.2 Use of image enhancement and compression 76.3 Test target scanning 76.4 Internal test systems 76.5 Frequency 77 Evaluation of the results . 77.1 Evaluation 77.2 Screen resolution 88 Test method . 88.1 Test elements 88.2 Test procedures 8Bibliography .20B
10、S ISO 12653-3:2014ISO 12653-3:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body i
11、nterested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechn
12、ical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO do
13、cuments 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). 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 respon
14、sible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction 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
15、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 conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following U
16、RL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 171, Document management applications, Subcommittee SC 1, Quality.ISO 12653 consists of the following parts, under the general title Electronic imaging Test target for scanning of office documents: Part 1:
17、Characteristics Part 2: Method of use Part 3: Test target for use in lower resolution applicationsiv ISO 2014 All rights reservedBS ISO 12653-3:2014ISO 12653-3:2014(E)IntroductionThis part of ISO 12653 describes procedures for evaluating the quality of output from office document scanning systems th
18、at are set to scan documents up to 300 dpi. The systems can be used to scan in black and white, in greyscale, or in colour.Test charts and targets already exist for micrographics and facsimile transmission but they are specific to these said fields and do not meet the needs of the users of document
19、scanning systems.ISO 12653-1 specifies a test target for use in general scanning systems, to enable their performance to be evaluated and to establish performance limits of the systems. Its method of use is specified in ISO 12653-2. ISO 2014 All rights reserved vBS ISO 12653-3:2014BS ISO 12653-3:201
20、4Electronic imaging Test target for scanning of office documents Part 3: Test target for use in lower resolution applications1 ScopeThis part of ISO 12653 specifies a test target for assessing the consistency of the output quality over time from lower resolution reflection scanning systems.It is app
21、licable to assessing the output quality of black-and-white and colour scanners used for black-and-white or colour office documents, with or without half tone.It does not apply to scanners used for the scanning of transparent or translucent documents.2 Normative referencesThe following documents, in
22、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.ISO 5-4:2009, Photography and graphi
23、c technology Density measurements Part 4: Geometric conditions for reflection density.ISO 446:2004, Micrographics ISO character and ISO test chart No. 1 Description and use.ISO 3334:2006, Micrographics ISO resolution test chart No 2 Description and use.ISO 12653-1:2000, Electronic imaging Test targe
24、t for the black-and-white scanning of office documents Part 1: Characteristics.ISO 12653-2:2000, Electronic imaging Test target for the black-and-white scanning of office documents Part 2: Method of use.ISO 12653-2:2000 / Cor:1:20023 Terms and definitionsFor the purposes of this document, the terms
25、and definitions given in ISO 12651 and the following apply.3.1test elementpattern represented on a targetEXAMPLE Millimetre scale, grey scale, circle.3.2continuous tonetonal variation in a document represented by areas of different density3.3lower resolution applicationscanning system that is config
26、ured to scan up to 300 dpiINTERNATIONAL STANDARD ISO 12653-3:2014(E) ISO 2014 All rights reserved 1BS ISO 12653-3:2014ISO 12653-3:2014(E)4 Uses of this part of ISO 126534.1 GeneralThe method described in Clause 8 of this part of ISO 12653 for assessing the output quality of office document scanners
27、(both black-and-white and colour) can be used in the following: to initially set up the system to yield satisfactory images; to check for consistent quality; to check that equivalent performance is being obtained from another system.If the whole system is checked, from input to output, the results o
28、btained can vary depending on the different items of equipment used. For example, one visual display unit screen can be poorly set up, giving worse quality than a well set up screen. It is thus important to establish the parts of the system on which to perform the tests. If tests of other parts of t
29、he system are required, then the tests should be repeated as appropriate.The regular use of these procedures should enable a given level of quality to be maintained. The method is intended to enable the operator to check that the scanner is correctly set up, to inform the operator of the capabilitie
30、s and limits of the scanner, to enable the user to monitor image quality over a period of time, and to enable the user to draw up quality assessment procedures.4.2 Factors affecting qualityFactors which affect the quality achieved by a document scanning system are physical scanning irregularities, u
31、niformity of exposure, chromatic sensitivity of the photosensing unit, contrast, threshold setting, reproduction of half-tones, resolution, and scale.5 Test target5.1 GeneralThe black and white and colour test targets specified in this part of ISO 12653 include characters and graphics as test elemen
32、ts.5.2 Description of the test elementsThe test target shall comprise of the following display elements, arranged as shown in Figures 1 and 2.2 ISO 2014 All rights reservedBS ISO 12653-3:2014ISO 12653-3:2014(E)The test target shall include the words “FOR USE AT UP TO 300 dpi ONLY”.The test elements
33、on the targets should be of such quality that scanners being assessed reach a point of failure. Determination of this point will enable the user to ascertain the characteristics of documents that are unlikely to produce an acceptable image.NOTE The sample layout of the test target shown in Figure 1
34、is a reduced reproduction. The test target would normally fill a whole A4 size page.The test elements as described below refer to the areas on the test target as indicated by the area letters shown in Figure 2.a) Area A: 10-mmwide frame subdivided into 2 mm parallel lines which delineate the outer e
35、dge of the target; 12 arrow-shaped elements, three on each side of the target, whose outward points touch the outer edges of the target.b) Area B: diagonal line with two marks 300 mm apart designating the ends of the diagonal line and end marks are equidistant from the centre of the target. (The lin
36、e is blanked out where it crosses elements K and N.)c) Area C: three equally spaced concentric circles with a cross indicating their centre point; a Pestrecov star pattern, with associated areas indicating frequency in lines per millimetre at each of the clear circles of the star, is composed of tap
37、ered black and white radial lines over 360 having equal angular frequency and concentric white circles at frequencies equivalent to 1,8 lines per millimetre, 2,5 lines per millimetre, and 3,6 lines per millimetre.d) Area D: group of international standard characters (see ISO 446) having heights in t
38、he R20 series, 56 m x 10 to 280 m x 10.e) Area E: selection of characters of various sizes and type styles, including at least one serif and at least one sanserif font, with the smallest character size used smaller than the smallest character size normally scanned by the system. The character size a
39、nd type style used can be indicated on the test target. Characters used can be Latin type and/or non-Latin type depending upon end-user requirements. White characters on a black background can be added if appropriate.f) Area F: two ISO No 2 test charts (see ISO 3334) having frequencies in the R20 se
40、ries 2,0 to 7,1 line pairs/mm. One test chart shall be aligned at 45 to the line of scanning.g) Area G: two contiguous rectangles each divided into 10 zones; one rectangle shall have a white background and the other shall have a black background. Each rectangle shall have lines of opposite polarity
41、progressively changing zone-by-zone in width from 0 to 0.5 mm. Where these lines cross zone boundaries, they shall be of opposite polarity to the line. Line widths shall be indicated. One test chart shall be aligned at 90 to the line of scanning, a second test chart shall be aligned to the direction
42、 of scanning.h) Area H: ISO 2014 All rights reserved 3BS ISO 12653-3:2014ISO 12653-3:2014(E) horizontal and vertical rectangular areas of uniform visual diffuse reflection density, measured in accordance with ISO 5-4, minimum density 1,2.i) Area I: selection of widely spaced small non-alphanumeric c
43、haracters.j) Area J: area of background (white) colour at least 30 mm x 30 mm, delineated by a black border of at least 1mm width.k) Area K: four scales of half-tone wedges, each wedge ranging from 10 % to 100 % in increments of 10 %, one each in cyan, magenta, yellow and black at screen size 6,9 li
44、nes/mm.NOTE The grey scale range represents the percentage of black to white in the half-tone.l) Area L: four areas of uniform continuous density, ranging in steps from 0,3 to 1,2 density.m) Area M: two scales of half-tone grey wedges at different screen sizes, each wedge ranging from 0 % to 90 % in
45、 increments of 10 % at screen sizes 3,3 and 6,9 lines/mm.n) Area N: six ladder patterns, three in each direction. Ladder patterns shall be at 1,8, 2,5 and 3,6 lines/mm.o) Area O: colour image with areas of varying colours.p) Area P: arrows to indicate in which direction the target shall be placed in
46、 the scanner.4 ISO 2014 All rights reservedBS ISO 12653-3:2014ISO 12653-3:2014(E)Figure 1 Sample layout of test target ISO 2014 All rights reserved 5BS ISO 12653-3:2014ISO 12653-3:2014(E)Figure 2 Layout of target area (see 4.2)5.3 BaseThe test target shall be made on a white opaque base with a gloss
47、y surface. The base size shall be that typical of documents normally scanned (for example, A4).6 ISO 2014 All rights reservedBS ISO 12653-3:2014ISO 12653-3:2014(E)5.4 Test target for duplex scannersThe target described in 5.2 may be created as a single-sided or as a double- sided target. Where doubl
48、e sided, there shall be identical designs on the two sides, except for an indication of the side (e.g. Front, Back) displayed.6 Procedures6.1 Initial system set-upTests shall be run under normal operational conditions. Any required warm-up period shall be allowed before these tests are carried out.
49、Where appropriate, initial calibration routines shall be performed, in accordance with the manufacturers instructions, before these tests are carried out.6.2 Use of image enhancement and compressionThe quality of output of a scanning system can be modified by the use of image enhancement and compression techniques. For these tests, the system shall be operating under normal conditions with scanner settings as used for normal documents. It can be an advantage during t
