1、INTERNATIONAL STANDARD IS0 12653-2:2000 TECHNICAL CORRIGENDUM 1 Published 2002-03-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION . MDtqw-twonwa oPrA“wm no CTAHJWMHM ORGANISATION INTERNATIONALE DE NORMACISATION Electronic imaging - Test target for the black-and-white scanning of office documents -
2、 Part 2: Method of use TECHNICAL CORRIGENDUM 1 Imagerie lectronique - Cible dessai pour le scanning en noir et blanc des documents de bureau - Partie 2: Mthodes dutilisation RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to International Standard IS0 12653-2:2000 was prepared by Technical Committe
3、e ISOTC 171, Document imaging applications, Subcommittee SC 1, Quality. Page 3 Amend footnote to read: Test targets can be obtained from: AFNOR, 11, avenue Francis de Pressense, 93571 Saint-Denis La Plaine Cedex, France. Tel: +33 (0)l 41 62 80 OO. Fax: +33 (0)l 49 17 90 OO. Web site: httD:/W.afnOr.f
4、r/. BSI Customer Services, 389 Chiswick High Road, London W4 4AL, GB. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. E-mail: ordersbsi-. Web site: http:/www.bsi-cdobaI.com. Quote reference BSI DISC PD 0023:2001. - ICs 37.080 Ref. NO. IS0 12653-2:2000/Cor.l:2002(E) 0 IS0 2002 -All rights reserve
5、d Printed in Switzerland INTERNATIONAL STANDARD IS0 12653-2 First edition 2000-12-1 5 Electronic imaging - Test target for the black-and-white scanning of off ice documents - Part 2: Method of use Imagerie lectronique - Cible dessai pour le scanning en noir et blanc des documents de bureau - Pattie
6、2: Mthodes dutilisation This material is reproduced 6om IS0 documenis under International Organization for Standardization (SO) Copyright License Number IH.YCU1996. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval System or otherwise, except written
7、consent of IS0 (Case postai 56,121 1 Geneva 20, Switzerland, FAX +41 22 734 10 79), IHS or the IS0 Licensors members. Reference number IS0 12653-2:2000(E) o IS0 2000 STD-IS0 12b53-2-ENGL 2000 Li851703 0858070 8T7 IS0 12653-2:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In acc
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9、licensing policy. The IS0 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 pri
10、nting. Every care has been taken to ensure that the file is suitable for use by IS0 member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. o Is02000 All rights reserved. Unless otherwise specified, no pari of thi
11、s 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 IS0 at the address below or ISOs member body in the country of the requester. IS0 copyright office Case postale 56 CH-121
12、 1 Geneva 20 Tel. + 41 22 749 O1 11 Fax +41 227490947 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland II O IS0 2000 - All rights reserved STD-IS0 12b53-2-ENGL 2000 = i851903 0858071 735 IS0 12653=2:2000(E) Contents Page Foreword . iv Introduction . v 1 2 3 4 4.1 4.2 5 5.1 5.2 5.3 5.4 5.
13、5 6 7 7.1 7.2 8 8.1 8.2 8.3 Scope 1 Normative references 1 Terms and definitions . 1 Method 2 General 2 Quality . 2 Procedures . 3 Initial system Set-up 3 Use of image enhancement and compression . 3 Test target scanning 3 Internal test systems . 5 Frequency . 5 Evaluation of the results . 5 Method
14、5 Test elements . 5 Test procedures . 7 Additional targets 20 General 20 Target 3: RIT Process Ink Gamut Chart . 20 Continuous tone test target 20 O IS0 2000 . All rights reserved iii STD=ISO 12b53-2-ENGL 2000 i851903 0858072 b71 IS0 12653-2:2000(E) Foreword IS0 (the International Organization for S
15、tandardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the ri
16、ght to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internationa
17、l Standards are drafted in accordance with the rules given in the JSOAEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bod
18、ies casting a vote. Attention is drawn to the possibility that some of the elements of this part of IS0 12653 may be the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. International Standard IS0 12653-2 was prepared by Technical Committee I
19、SOTTC 171, Document imaging applications, Subcommittee SC 1, Quality. IS0 12653 consists of the following parts, under the general title Electronic imaging - Test target for the black- and- white scanning of office documents: - Part I: Characteristics - Part 2: Method of use iv Q IS0 2000 -All right
20、s reserved STD*ISO 12b53-Z-ENGL IS0 12653-2:2000(E) I n t roduct ion This part of IS0 12653 describes procedures for evaluating the output quality of a black-and-white scanning system for off ice documents, using the test target specified in IS0 i 2653-1. Test charts and targets already exist for mi
21、crographics and facsimile transmission, but they are specific to these said fields and do not meet the needs of the users of document scanning systems. (B IS0 2000 -All rights reserved V STD*ISO 12b53-2-ENGL 2000 = Li851903 085807Li 444 = INTERNATIONAL STANDARD IS0 12653-2:2OoO( E) Electronic imagin
22、g - Test target for the black-and-white scanning of off ice documents - Part 2: Method of use 1 Scope This part of IS0 12653 specifies test methods for evaluating the consistency of the output quality over time from the black-and-white reflection scanning of office documents using the test target sp
23、ecified in IS0 12653-1 and other targets. It is applicable to assessing the output quality of black-and-white scanners used for black-and-white or colour office documents, with or without half-tone or colour. It does not apply to colour scanners or scanners used for the scanning of transparent or tr
24、anslucent documents. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IS0 12653. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, p
25、arties to agreements based on this part of IS0 12653 are encouraged to investigate the possibility of applying 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 maintai
26、n registers of currently valid International Standards. IS0 446:1991, Micrographics - IS0 character and IS0 test chart No. 7 - Description and use. IS0 3334:1989, Micrographics - IS0 resolution test chart No. 2 - Description and use. IS0 12651 : 1999, Electronic imaging - Vocabulary. Recommendation
27、ITU T.22, Standardized test charts for document facsimile transmissions. 3 Terms and definitions For the purposes of this part of tS0 12653, the terms and definitions given in IS0 12651 and the following apply. 3.1 test element pattern represented on a target EXAMPLES Millimetre scale, grey scale, c
28、ircle. 3.2 continuous tone tonal variation in a document represented by areas of different density O IS0 2000 -All rights reserved 1 STD-IS0 12b53-2-ENGL 2000 D q851703 0858075 380 IS0 12653-2:2000(E) 4 Method 4.1 General The method for assessing the output quality of black-and-white scanners may be
29、 used in the following cases: - initially to 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 obtained may vary depending
30、on the different items of equipment used. For example, one visual display unit screen may 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 are required of other parts of the system, the
31、n 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; - inform the operator of the capabilities and limits of the scan
32、ner; - enable the user to monitor image quality over a period of time; - enable the user to draw up quality assessment procedures. 4.2 Quality Factors which affect the quality achieved by a document scanning system are: - physical scanning irregularities; - uniformity of exposure; - chromatic sensit
33、ivity of the photosensing unit; - contrast; - threshold setting; - reproduction of half-tones; - resolution; - scale. 2 O IS0 2000 -All rights reserved STDOIS0 12b53-2-ENGL 2000 9 4853703 085807b 217 IS0 126534:20(E) 5 Procedures 5.1 Initlal system Set-up Tests shall be run under normal operational
34、conditions. Any required warm-up period shall be allowed before these tests are carried out. Where appropriate, initiai calibration routines shall be performed, in accordance with the manufacturers instructions, before these tests are carried out. 5.2 Use of image enhancement and compression The qua
35、lity 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 may be an advantage during the initial testing to establish t
36、he best settings for these controls. Software changes may introduce different enhancement or compression techniques. New initial tests may be needed for validation after such changes. 5.3 Test target scanning When a test target is scanned, it shall be positioned correctly in the scanner. if the scan
37、ner incorrectly moves the target, the resultant image shall be rejected if any major quality problems are evident. For example, if the target alignment is substantially incorrect due to a problem with the paper path, the target shall be re-scanned. Ccan the test target (see Figure l), and either vie
38、w or print the image. NOTE Figure 1 is for information only. It is a reduced reproduction and should not be used as a test target). 1) Test targets can be obtained from AFNOR, Tour Europe, Cedex 7,92049 Paris La Dfense, France. Tel: 33 (1) 42 91 55 55. Q IS0 2000 - All rights reserved 3 IS0 12653-2:
39、2000(E) Figure 1 - Sample layout of test target 4 Q IS0 2000 - All rights resewed STD*ISO 22b53-2-ENGL 2000 4851903 0858078 09T IS0 126552:2000(E) 5.4 Internal test systems Many systems include test procedures in their software. These tests can be performed in conjunction with the test targets defin
40、ed in this part of IS0 12653. 5.5 Frequency The frequency of testing of a system should be set by the user, taking advice from the system supplier. It is preferable to test a system prior to the scanning of a batch of documents and, where necessary, at the end of the batch. The tests shall also be p
41、erformed after any maintenance operation or when any system component is changed. 6 Evaluation of the results A description of the test to be undertaken is given in 7.2, for each test element on the test target. The results obtained should be checked on a screen or on hard-copy. The results obtained
42、 on a screen may not agree with those obtained on hard-copy print out. In general, the legibility on screen is inferior to that of output on paper. However, both output methods should be used, as this can show deficiencies particular to one of the output devices being used. For quality control purpo
43、ses, a reference data file of quality control images should be maintained. 7 Method 7.1 Test elements A list of the test elements is given in Table 1. Details of each test on these elements of the test target are given in 7.2. Test No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Table 1 - Description and list of
44、test elements Characteristics measured Framing 1 Framing 2 Diagonal line scanning Circle scanning Legibility 1 Legibility 2 Resolution 1 Resolution 2 Resolution 3 Uniformity Continuous tone reproduction Half-tone reproduction Isolated small characters Target area A A B C D E F L G H J K I Purpose of
45、 the test Determine completeness of scan. a) Measure image displacement. b) Measure output scale. Determine accuracy of reproduction of a diagonal line. Determine accuracy of reproduction of a circle. Determine minimum size o IS0 No. 1 test characters that can be cleari) reproduced. Determine sizes
46、of characters of different typographical styles that can be clearly reproduced. Determine resolving power of the system. Determine effect of orientation on resolution. Determine limit of ability to reproduce fine detail. Determine uniformity of reproduction of a solid. Determine accuracy of reproduc
47、tion of a continuous tone, density stel: wedge. Determine limits of ability to reproduce half-tones in a range of screer sizes. Determine ability to reproduce small non-alphanumeric characters. IS0 2000 -All rights reserved 5 STDnISO 12b53-2-ENGL 2000 4851903 0858077 T2b W IS0 12653-2:2000(E) Figure
48、 2 indicates the target area (see Table 1) of each test element of the test target. 6 A E L K i J A H J Ca 1 A m Figure 2 - Layout of target area sheet O IS0 2000 - All rights reserved STD-IS0 LZb53-2-ENGL 2000 m Y853903 0858080 7YB IS0 12653-2:2000(E) 7.2 Test procedures Tests numbers 1 to 13 shall
49、 be executed using original test targets and not from copies thereof. The tests described shall be carried out on a screen and/or on an output hard-copy as appropriate. TEST Number 1 DESIGNATION I TARGET I :RAMING 1 PURPOSE OF THE TEST DESCRIPTION OF ELEMENT EVALUATION CALCULATION INTER PR ETAT I ON OBSERVATIONS AREA A I Determine completeness of scan. Diamond-shaped box, one acute angle of which touches the edge of the test target. 1111111111111111111111 Check that all the diamonds are visible and as complete as the scanner p
