1、 Reference number ISO 12639:2004(E) ISO 2004INTERNATIONAL STANDARD ISO 12639 Second edition 2004-05-15 Graphic technology Prepress digital data exchange Tag image file format for image technology (TIFF/IT) Technologie graphique change de donnes numriques de primpression Format de fichier dimage dtiq
2、uette pour la technologie dimage ISO 12639:2004(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 which are embedded are licensed to and installed on the computer
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5、tral Secretariat at the address given below. ISO 2004 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
6、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.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reservedISO 12639:2004(E) ISO 2004 All
7、 rights reserved iiiContents Page Foreword. v Introduction . vi 1 Scope 1 2 Compliance levels and identification 1 2.1 General. 1 2.2 Image file type identification 1 2.3 TIFF/IT conformance. 2 2.4 TIFF/IT-P1 conformance. 2 2.5 TIFF/IT-P2 conformance. 2 2.6 Conformance identification 2 3 Normative r
8、eferences. 2 4 Terms, definitions and abbreviated terms 3 4.1 Terms and definitions. 3 4.2 Abbreviated terms. 5 5 Notations and field types . 5 5.1 Notations 5 5.2 Field types 6 6 Image data type description. 7 6.1 Colour continuous-tone picture image (CT) data 7 6.2 Colour line-art (LW) image data.
9、 7 6.3 High-resolution continuous-tone (HC) image data 7 6.4 Monochrome and binary images. 7 6.5 Final page (FP) data 8 7 Requirements for TIFF/IT, TIFF/IT-P1 and TIFF/IT-P2 image data files 8 7.1 Structure of TIFF/IT file. 8 7.2 General parameters 10 7.3 Colour continuous-tone picture (CT) file 22
10、7.4 Colour line-art (LW) file 25 7.5 High-resolution continuous-tone (HC) file . 32 7.6 Monochrome continuous-tone picture (MP) file 35 7.7 Binary picture (BP) file . 38 7.8 Binary line-art (BL) file 40 7.9 Screened data image (SD) file 42 7.10 Final page (FP) file 44 Annex A (informative) Backgroun
11、d of conformity levels . 50 Annex B (informative) Identification and determination procedures for TIFF/IT file type 52 Annex C (informative) Relationship between image types on a colour page 54 Annex D (informative) Alphabetical list of TIFF/IT field names 55 Annex E (normative) Incorporating JPEG c
12、ompressed data into TIFF/IT 57 Annex F (normative) Incorporating Flate compressed data into TIFF/IT 59 Annex G (normative) RGB colour-space data in TIFF/IT-CT 61 Annex H (normative) LAB colour space data in TIFF/IT CT . 65 Annex I (informative) Colour values . 68 ISO 12639:2004(E) iv ISO 2004 All ri
13、ghts reservedAnnex J (normative) ICC Profile tag in TIFF/IT image.69 Annex K (informative) Monochrome continuous-tone picture colour-value calculation 70 Bibliography74 ISO 12639:2004(E) ISO 2004 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide fe
14、deration 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 subject for which a technical committee has been established has the right to be represented on that com
15、mittee. International organizations, governmental and non-governmental, in liaison with 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 accord
16、ance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical 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 require
17、s 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12639 was prepared by Technical
18、Committee ISO/TC 130, Graphic technology. This second edition cancels and replaces the first edition (ISO 12639:1998), which has been technically revised to add new capabilities, as well as a new constrained conformity level call Profile 2 (P2) to supplement the previously defined Profile 1 (P1), wh
19、ich is unchanged. New capabilities include the following: expanded LW palette to support up to 65 535 colours; support for up to 32 separations; new file format “SD” for copydot data with CCITT G4 compression; new compression schemes: Flate and JPEG; “FP” file format is now defined as normative. ISO
20、 12639:2004(E) vi ISO 2004 All rights reservedIntroduction The goal of ISO/TC 130 in developing the initial version of ISO 12639 was to enable the interchange of various types of rasterized colour and monochrome image data among electronic digital systems used in prepress image processing, graphic a
21、rts design and related document creation and production operations. It was, and is, intended for use as a media-independent means for such interchange, and therefore is applicable to facilitate interchange through a variety of mechanisms such as, but not limited to, network, magnetic and optical med
22、ia. Both ISO 12639:1998 and this second edition are based on the Adobe TIFF, Version 6.0 file format, and both extend and restrict the technical features of that format. This second edition of ISO 12639, though based on ISO 12639:1998, specifies new capabilities, as well as a new constrained conform
23、ity level called Profile 2 (P2) to supplement the previously defined Profile 1 (P1), which is unchanged. The key added capabilities include a normative final page (FP) format; a new SD file format with optional G4 compression for copydot data; definitive ways to use RGB and CIELAB colour spaces in C
24、T, as well as 16-bit-per-channel data in CT; JPEG compression in CT and MP; Flate compression in all formats except LW, HC and BL; spot colours (colours other than cyan, magenta, yellow and black) in LW, CT, HC, MP, BP, BL, and SD; and support for up to 65 535 colours in LW colour palettes. The new
25、P2 compliance level incorporates all features of P1 and defines a constrained compliance level for these new capabilities. All of the features of ISO 12639:1998, including the constrained level of conformity called Profile 1 (P1), have been retained. It should be noted that the P1 formats for CT (Co
26、lour Picture), MP (Monochrome Picture), and BP (Binary Picture) files are compatible with the popular TIFF 6.0 files for CMYK (Separated) Images, Monochrome Images and Bilevel Images respectively. The P1 formats for HC (High-Resolution Continuous- Tone), LW (Line-Art) and BL (Binary Line-Art), thoug
27、h not compatible with TIFF 6.0, are designed to be easier to implement within desktop systems by limiting the range of options and selections. The Profile 1 and 2 formats allow for a broader usage of this International Standard by allowing conformance to simplified, restricted subsets of functionali
28、ty supported by many popular application software systems used in the prepress, graphic arts document processing and computer graphics and imaging industries. A P2-compliant reader will also read all P1-compliant files. As a historical note, ISO 12639:1998 was based on the American National Standard
29、 ANSI IT8.8, Graphic technology Prepress digital data exchange Tag image file format for image technology (TIFF/IT). INTERNATIONAL STANDARD ISO 12639:2004(E) ISO 2004 All rights reserved 1Graphic technology Prepress digital data exchange Tag image file format for image technology (TIFF/IT) 1 Scope T
30、his International Standard specifies a media-independent means for prepress electronic data exchange using a tag image file format. This International Standard defines image file formats for encoding colour continuous-tone picture images, colour line-art images, high-resolution continuous-tone image
31、s, monochrome continuous-tone picture images, binary picture images, binary line-art images, screened data, and images of composite final pages. 2 Compliance levels and identification 2.1 General This International Standard has three levels of conformance: TIFF/IT (also referred to as full TIFF/IT),
32、 TIFF/IT-P1 and TIFF/IT-P2. All conformance levels are intended to support a media-independent means for the exchange of various images used in the prepress, printing, graphic arts, and information processing fields. TIFF/IT-P1 conformance provides a minimized set of options to permit simpler implem
33、entation and compatibility, where possible (for CT, BP, and MP files), with commonly available TIFF 6.0 readers and writers. TIFF/IT-P1 is intended for use where the full set of TIFF/IT options is not required. TIFF/IT-P2 is also a subset of the TIFF/IT specification. TIFF/IT-P2 incorporates all of
34、the options defined for TIFF/IT-P1 and, in addition, provides support for spot colours, a larger LW colour palette, the SD file format for screened data, and additional compression methods. Only those TIFF/IT fields defined in this International Standard are required to be written, recognized and in
35、terpreted by conforming implementations. TIFF fields that are unclassified or not referred to in this International Standard are not required to be supported for an implementation to conform to this International Standard. If an unsupported field is read, processing of that field is at the discretio
36、n of the reader. The reader shall follow the strategy described in TIFF and attempt to process the file while ignoring unsupported fields (see Annex A). This International Standard specifies the requirements for conforming TIFF/IT, TIFF/IT-P1 and/or TIFF/IT-P2 files for specific image data types. Fi
37、les for each specific image data type that conform to the requirements of this International Standard shall be considered conforming TIFF/IT, TIFF/IT-P1 and/or TIFF/IT-P2 files for the specific image data type. Readers that accept and process these files shall be considered conforming TIFF/IT, TIFF/
38、IT-P1 or TIFF/IT-P2 readers for the specific image data types. Writers that generate and output these files shall be considered conforming TIFF/IT, TIFF/IT-P1 or TIFF/IT-P2 writers for the specific image data types. Where requirements of this International Standard and TIFF 6.0 are in conflict, this
39、 International Standard shall take precedence. 2.2 Image file type identification TIFF/IT provides the ability to represent the data structure of a wide range of printing and graphic arts images. The identification of the individual image file types is as follows (see Annex B): TIFF/IT-CT colour con
40、tinuous-tone picture image data; TIFF/IT-LW colour line-art image data; ISO 12639:2004(E) 2 ISO 2004 All rights reserved TIFF/IT-HC high-resolution continuous-tone image data; TIFF/IT-MP monochrome continuous-tone picture image data; TIFF/IT-BP binary picture image data; TIFF/IT-BL binary line-art i
41、mage data; TIFF/IT-SD screened data image data; TIFF/IT-FP final page data. 2.3 TIFF/IT conformance For conformance to this International Standard, all image file types do not have to be implemented. Each image file type described in Clause 7 may be individually implemented. Files, readers or writer
42、s may be identified as conforming for either all image file types or specifically identified image file types. Conformance with TIFF/IT requires implementation of the requirements for all image file types as described in Clause 7. Conformance with a specific image file type or types requires identif
43、ication of the specific image file type using the identification defined in 2.2 (e.g. TIFF/IT-CT). 2.4 TIFF/IT-P1 conformance TIFF/IT-P1 conformance provides the ability to represent the data structure of various images in as simple and straightforward a way as possible in order to support image-fil
44、e exchange with prepress, printing, graphic arts, and information processing systems and applications. TIFF/IT-P1 is a subset of TIFF/IT. Conformance with TIFF/IT-P1 requires implementation of the requirements for all image file types as described in Clause 7. Conformance with a specific image file
45、type or types requires identification of the specific image file type using the identification defined in 2.2 with the designation “/P1” appended (e.g. TIFF/IT-CT/P1). 2.5 TIFF/IT-P2 conformance TIFF/IT-P2 conformance provides the ability to represent the data structure of various images in as simpl
46、e and straightforward a way as possible in order to support image file exchange with prepress, printing, graphic arts, and information processing systems and applications. TIFF/IT-P2 is a subset of TIFF/IT and forms an intermediate conformance level between TIFF/IT and TIFF/IT-P1. Conformance with T
47、IFF/IT-P2 requires implementation of the requirements for all image file types as described in Clause 7. Conformance with a specific image-file type or types requires identification of the specific image file type using the identification defined in 2.2 with the designation “/P2” appended (e.g. TIFF
48、/IT-CT/P2). 2.6 Conformance identification Conformance with the provisions of this International Standard shall be identified individually for files, readers, and writers. The accepted terminology shall be the image-file type followed by the designation “file”, “reader” or “writer” (e.g. TIFF/IT wri
49、ter, TIFF/IT-CT/P1 reader, TIFF/IT-LW file). 3 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 12639:2004(E) ISO 2004 All rights reserved 3ISO 3166 (all parts), Codes for the representation of names of countries and their subdivisions ISO 12641:1997, Graphic technology Prepress d
