ISO 446-2004 Micrographics - ISO character and ISO test chart No 1 - Description and use《缩微摄影技术 ISO字符和ISO 1号测试图 描述和使用》.pdf
《ISO 446-2004 Micrographics - ISO character and ISO test chart No 1 - Description and use《缩微摄影技术 ISO字符和ISO 1号测试图 描述和使用》.pdf》由会员分享,可在线阅读,更多相关《ISO 446-2004 Micrographics - ISO character and ISO test chart No 1 - Description and use《缩微摄影技术 ISO字符和ISO 1号测试图 描述和使用》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、 Reference number ISO 446:2004(E) ISO 2004INTERNATIONAL STANDARD ISO 446 Third edition 2004-03-15 Micrographics ISO character and ISO test chart No. 1 Description and use Micrographie Caractre ISO et mire ISO N 1 Description et utliisation ISO 446:2004(E) PDF disclaimer This PDF file may contain emb
2、edded typefaces. In accordance with Adobes 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
3、 not infringing Adobes 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
4、 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. ISO 2004 All rights reserved. Unless otherwise spe
5、cified, 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 ISOs member body in the country of the requester. ISO copyright office
6、Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reservedISO 446:2004(E) ISO 2004 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references. 1
7、3 Terms and definitions. 1 4 Description and use of the ISO character 2 4.1 Description 2 4.2 Use 2 5 Production of ISO test chart No. 1 2 5.1 Base 2 5.2 Test chart lay-out 4 5.3 Density-measuring areas. 6 5.4 Identification 6 5.5 Certification of ISO No. 1 test charts 7 6 Procedure for using ISO te
8、st chart No. 1 7 6.1 Method 7 6.2 Density of the film . 7 6.3 Legibility control. 7 ISO 446:2004(E) iv ISO 2004 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Inter
9、national Standards is normally carried out through ISO technical committees. Each member body interested 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 wit
10、h ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technica
11、l committees is to prepare International Standards. 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 bodies casting a vote. Attention is drawn to
12、 the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 446 was prepared by Technical Committee ISO/TC 171, Document management applications, Subcommittee SC 1, Quality. This
13、 third edition cancels and replaces the second edition (ISO 446:1991), which has been technically revised. ISO 446:2004(E) ISO 2004 All rights reserved vIntroduction Most processes produce images of lower quality; among others diffusion transfer, if it still exists, is capable of enhancing quality.
14、This degradation may go so far as to make the information illegible. Poor legibility may also cause visual fatigue after prolonged viewing. The legibility of an image can be assessed by measuring the limit of resolution, i.e. the ability to distinguish lines in different directions. However, the lim
15、it of resolution corresponds to a quality level insufficient to permit easy reading, and to prolong it without visual fatigue. A criterion which better simulates actual working conditions was sought. The ISO character, which is a conventional character similar to typefaces used in the printing indus
16、try, the outline and details of which should be distinguished without difficulty, meets these requirements. The main practical applications of the ISO character are based on the following experimental properties. a) If a particular reproduction process gives an identifiable image from a group of ISO
17、 characters of a certain height, it can be assumed that the same process will produce, from a printed text of comparable typeface size, a satisfactory image and, in particular, one that is sharp enough to be read, without undue visual fatigue for the viewer. b) In general, the identification of the
18、same limiting group of ISO characters by different observers gives substantially identical results. Care should be taken when referencing this International Standard in other standards. Some countries do not use this standard or use alternative standards (such as ISO 3334:1989, Micrographics ISO res
19、olution test chart No. 2 Description and use). INTERNATIONAL STANDARD ISO 446:2004(E) ISO 2004 All rights reserved 1Micrographics ISO character and ISO test chart No. 1 Description and use 1 Scope This International Standard specifies the characteristics of the black and white ISO character and of t
20、he ISO test chart No. 1, as well as their use. It applies to the quality control of the microimages produced with a given micrographic system and the assessment of the potential legibility of the documents recorded using that system. 2 Normative references The following referenced documents are indi
21、spensable 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 3:1973, Preferred numbers Series of preferred numbers ISO 5-2:2001, Photography Density
22、measurements Part 2: Geometric conditions for transmission density ISO 5-3:1995, Photography Density measurements Part 3: Spectral conditions ISO 5-4:1995, Photography Density measurements Part 4: Geometric conditions for reflection density ISO 2471:1998, Paper and board Determination of opacity (pa
23、per backing) Diffuse reflectance method ISO 6196-1:1993, Micrographics Vocabulary Part 1: General terms 180 6196-2:1993, Micrographics Vocabulary Part 2: Image positions and methods of recording ISO 6196-3:1997, Micrographics Vocabulary Part 3: Film processing ISO 6196-4:1998, Micrographics Vocabula
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO4462004MICROGRAPHICSISOCHARACTERANDISOTESTCHARTNO1DESCRIPTIONANDUSE 缩微 摄影 技术 ISO 字符 ISO1 测试 描述 使用

链接地址:http://www.mydoc123.com/p-1253913.html