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1、 Reference number ISO 14648-1:2001(E) ISO 2001 INTERNATIONAL STANDARD ISO 14648-1 First edition 2001-12-01 Micrographics Quality control of COM recorders that generate images using a single internal display system Part 1: Characteristics of the software test target Micrographie Contrle de la qualit
2、des microformes produites sur un systme lectronique (COM) de gnration dimage adressage de points Partie 1: Caractristiques de la cible contrle de la qualit Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04
3、/23/2007 07:26:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces whi
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6、that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2001 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
7、and microfilm, without permission in writing from either ISO at the address below or ISOs 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 copyrightiso.ch Web www.iso.ch Printed in Switzerland ii I
8、SO 2001 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001(E) ISO 2001 All rig
9、hts reserved iii Foreword ISO (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 interested in a subj
10、ect 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 Electrotechnical Commission (IE
11、C) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committ
12、ees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 14648 may be the subject of patent rights. ISO shal
13、l not be held responsible for identifying any or all such patent rights. ISO 14648-1 was prepared by Technical Committee ISO/TC 171, Document imaging applications, Subcommittee SC 1, Quality. ISO 14648 consists of the following parts, under the general title Micrographics Quality control of COM reco
14、rders that generate images using a single internal display system: Part 1: Characteristics of the software test target Part 2: Method of use Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:
15、25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001(E) iv ISO 2001 All rights reserved Introduction This part of ISO 14648 provides a specification for characteristics of a software test target used for the image quality evaluation of Computer Output Microfi
16、lm (COM) recorder systems that generate images using a single internal display system. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without
17、license from IHS -,-,- INTERNATIONAL STANDARD ISO 14648-1:2001(E) ISO 2001 All rights reserved 1 Micrographics Quality control of COM recorders that generate images using a single internal display system Part 1: Characteristics of the software test target 1 Scope This part of ISO 14648 specifies the
18、 characteristics of a software test target that is electronically generated, to be used in COM recorder systems that can accept electronic forms. The components have been designed to check or test certain capabilities of the COM recorder system in order to enable image quality to be assessed and mai
19、ntained. The recording method (i.e. laser scanner, cathode ray tube, light emitting diode, etc.) is not relevant in establishing the software test target components. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisio
20、ns of this part of ISO 14648. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 14648 are encouraged to investigate the possibility of applying the most recent editions of the normative do
21、cuments indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 5-2:1991, Photography Density measurements Part 2: Geometric conditions for transmission densit
22、y ISO 5-3:1995, Photography Density measurements Part 3: Spectral conditions ISO 6196-1:1993, Micrographics Vocabulary Part 1: General terms ISO 6196-5:1987, Micrographics Vocabulary Part 5: Quality of images, legibility, inspection ISO 6196-6:1992, Micrographics Vocabulary Part 6: Equipment ISO 619
23、6-7:1992, Micrographics Vocabulary Part 7: Computer micrographics 3 Terms and definitions For the purposes of this part of ISO 14648, the terms and definitions given in ISO 6196 and the following apply. 3.1 dot smallest unit that can be recorded on microfilm by the COM recorder system Copyright Inte
24、rnational Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001(E) 2 ISO 2001 All rights reserved 4 Test targets 4.1 General
25、Two test targets are specified. Target 1 (see Figure 2) is intended for COM systems that have limited bit map memory. The complexity and number of components on the test target are limited to a few basic types. For COM systems having greater bit map memory capability, Target 2 (see Figure 3) has mor
26、e components with increased complexity. 4.2 Dot spacing The centre to centre spacing of consecutive dots is related to the resolution specification of the original full document size being recorded at the reduced microfilm size. For example, if the original is specified at a resolution of 240 dpi th
27、en the dot spacing at full size is 0,004 2 inches. If this is reduced to microfilm at a reduction of 48 then the pixel spacing on film is 0,000 087 inches. As depicted in Figure 1, the dot overlap ratio is equal to the diameter/centre to centre spacing. The dot diameter is typically larger than the
28、centre to centre spacing so that the recording of consecutive dots is smoothed to form a line. The ratio of dot diameter to dot spacing is generally a factor chosen between 1,3 and 1,5 by the COM recorder system manufacturer. Thus, the dot diameter varies with the reduction and also with the resolut
29、ion. 4.3 Grid layout The grid shall consist of 132 cells horizontally and 64 cells vertically forming columns and rows in which characters may be placed. The outside dimensions of the grid conform to the text dimensions 335,3 mm in the horizontal direction and 270,9 mm in the vertical direction at f
30、ull size. 4.4 Border A line of single dot width shall enclose the grid patterns of Target 1 and Target 2, see Figures 2 and 3, spaced from the grid pattern by one cell size. The size of the border in terms of the grid pattern is 134 columns by 66 rows. It shall be generated at the extreme edge of th
31、e cells specified in 4.3. Key 1 Dots 2 Diameter 3 Centre to centre Figure 1 Dot overlap Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without
32、 license from IHS -,-,- ISO 14648-1:2001(E) ISO 2001 All rights reserved 3 Figure 2 Sample layout of Target 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networ
33、king permitted without license from IHS -,-,- ISO 14648-1:2001(E) 4 ISO 2001 All rights reserved Figure 3 Sample layout of Target 2 4.5 Test charts A test chart shall comprise five test patterns. Each test pattern shall comprise two groups of six lines and five spaces of equal width, each group at r
34、ight angles to the other, numbered one to five to indicate its line width in dots. Each line shall be 48 dots in length. Spaces between horizontal and vertical groups shall be 10 dots and 27 dots respectively. Target 1 shall include two test charts located in the upper left and right corners of the
35、target. Target 2 shall include six test charts, one in each corner and two near the centre of the target. The notional corner of the smallest pattern in each test chart shall be positioned as specified in Table 1. NOTE One or more patterns of a test chart may not be resolvable depending on the COM r
36、ecorder system adjustment, accuracy of focus and degree of dot overlap (see Figure 1) designed into the system to smooth out consecutive dot recording to appear as a line. However, the smallest pattern that is resolvable by the human eye with the aid of a microscope can be used for future reference
37、in detecting any changes in system performance. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001
38、(E) ISO 2001 All rights reserved 5 Table 1 Grid positions of test charts Pattern Column Row Top left 2 1 Top right 131 1 Centre left 64 36 Centre right 69 36 Bottom left 2 64 Bottom right 131 64 4.6 Density measuring areas Three density patches, 40 columns wide by 24 rows high enclosed in a box havi
39、ng a two dot line width, shall be provided. There shall be a blank area one column wide between the sides of a box and its density patch and a similar area half a row high between the top and bottom of a box and its density patch. The patch on the right side shall be generated as solid (all dots on)
40、, the patch in the centre shall be clear (all dots off) and the patch on the left shall be cross-hatched with lines one dot wide and spaces two dots wide. An inner border one dot wide, delineating the clear area of the centre patch, shall be produced. The locations of the patches, referenced to the
41、top left corners of the outer box, shall be as specified in Table 2. Table 2 Density area positions Box type Top left coordinate Solid Column 90, row 32 Cross-hatched Column 2, row 32 Clear Column 46, row 39 4.7 Diagonal lines There shall be two lines, one dot width, located as in Table 3. The lines
42、 shall run through the entire cell that is identified as an end point. Table 3 Diagonal line positions Line Top location Bottom location Left Column 22, row 18 Column 8, row 26 Right Column 111, row 18 Column 125, row 26 4.8 COM character legibility areas The primary character pattern used for judgi
43、ng legibility shall comprise of upper case letters E, H and N, as generated by the COM recorder, having pitches of 0,394, 0,472 and 0,591 characters per millimetre. The areas shall be positioned as in Table 4, and Figures 2 and 3. Copyright International Organization for Standardization Provided by
44、IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 07:26:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14648-1:2001(E) 6 ISO 2001 All rights reserved Table 4 Character legibility test positions Position Start column Start row Left 3
45、 17 Right 130 17 Centre (two patterns, Target 1 only) 64, 69 32 4.9 Alternative font area The area from row 16 to row 28 and from column 32 to column 102 shall be reserved for alternative fonts. Characters of other fonts appropriate for typical applications may be used. 4.10 Measuring scale Target 2
46、 shall contain two straight lines for use as measuring scales. The horizontal line shall start in column 6, row 29. The length of the line shall be such that the length of the equivalent line on the microimage shall be 6,35 mm. Where multiple reduction ratios can be used, marks shall be made on the
47、line such that the length of the relevant part of the line on the microimage from the start point shall be 6,35 mm. The relevant reduction ratios (such as 1:24, 1:48) shall be indicated on the test target. The vertical line shall start in column 27, row 65. The length of the line shall be such that
48、the length of the equivalent line on the microimage at 1:24 shall be 6,35 mm. Where multiple reduction ratios can be used, marks shall be made on the line such that the length of the relevant part of the line on the microimage from the start point shall be 6,35 mm. Where 1:48 reduction ratio is available, the mark will be such that the length of the relevant part of the line on the micro