1、BS ISO 12234-3:2016Electronic still picture imaging Removable memoryPart 3: XMP for digital photographyBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 12234-3:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12234-3:2
2、016.The UK participation in its preparation was entrusted to TechnicalCommittee CPW/42, Photography.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 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91226 9ICS 37.040.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards
4、Policy and Strategy Committee on 30 June 2016.Amendments issued since publicationDate Text affectedBS ISO 12234-3:2016 ISO 2016Electronic still picture imaging Removable memory Part 3: XMP for digital photographyImage lectronique de photographie Mmoire amovible Partie 3: Utilisation du XMPINTERNATIO
5、NAL STANDARDISO12234-3First edition2016-07-01Reference numberISO 12234-3:2016(E)BS ISO 12234-3:2016ISO 12234-3:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be repr
6、oduced 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 the address below or ISOs member body in the country of the requeste
7、r.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 12234-3:2016ISO 12234-3:2016(E)Foreword vIntroduction vi1 Scope . 12 Normative references 13 Terms and definitions . 14 Reference model and u
8、sage 24.1 General considerations 24.2 Native metadata properties and their usage . 25 XMP namespace . 35.1 General . 35.2 Extensions . 36 Metadata definitions 36.1 Metadata lists . 36.2 Metadata definitions 76.2.1 Value type . 76.2.2 ApertureValue 76.2.3 Artist . 76.2.4 BodySerialNumber . 76.2.5 Cam
9、eraOwnerName 86.2.6 CaptureSet . 86.2.7 CFAPattern 86.2.8 ColourEncoding 86.2.9 Copyright 96.2.10 DateTimeDigitized 96.2.11 DateTimeOriginal 96.2.12 DateTime 96.2.13 DigitalZoomRatio . 96.2.14 Editor . 96.2.15 ExposureBiasValue. 96.2.16 ExposureIndex 106.2.17 ExposureProgram 106.2.18 Faces 106.2.19
10、Favorites . 116.2.20 Flash . 116.2.21 FocalLength . 126.2.22 FocalLengthIn35mmFilm 126.2.23 GPS 126.2.24 ImageAspectRatio 136.2.25 ImageDescription .146.2.26 ImageLength . 146.2.27 ImageTileSet . 146.2.28 ImageWidth .146.2.29 LensMake. 146.2.30 LensModel 146.2.31 LensSerialNumber .146.2.32 LensSpeci
11、fication 156.2.33 LightSource 156.2.34 Make 166.2.35 MaxApertureValue .166.2.36 MeteringMode . 166.2.37 Model 166.2.38 MultiSpectralCaptureSet 16 ISO 2016 All rights reserved iiiContents PageBS ISO 12234-3:2016ISO 12234-3:2016(E)6.2.39 OECF 176.2.40 Orientation . 176.2.41 SceneLuminance .176.2.42 Se
12、lf-TimerMode 176.2.43 ShutterSpeedValue 176.2.44 Software 186.2.45 SubjectArea 186.2.46 SubjectDistance 196.2.47 UserComments .19Annex A (normative) XMP metadata use with Exif image format .20Annex B (normative) XMP metadata use with TIFF/EP image format .22Annex C (normative) XMP metadata use with
13、JPEG 2000 image format .23Annex D (normative) Value forms and value types 24Bibliography .29iv ISO 2016 All rights reservedBS ISO 12234-3:2016ISO 12234-3:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies)
14、. 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 committee. International organizations, governmental and non
15、-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.The procedures used to develop this document and those intended for its further maintenance are describ
16、ed in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents 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 t
17、he 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO
18、 list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given 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 w
19、ell as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 42, Photography.ISO 12234 consists of the following parts, unde
20、r the general title Electronic still-picture imaging Removable memory: Part 1: Basic removable-memory model Part 2: TIFF/EP image data format Part 3: XMP for digital photography ISO 2016 All rights reserved vBS ISO 12234-3:2016ISO 12234-3:2016(E)IntroductionMetadata enables digital images to be more
21、 easily searched and located (e.g. by knowing more about the image), more appropriately processed and printed (e.g. by knowing the picture-taking conditions), and more appropriately stored and shared (e.g. by knowing the GPS location of the image and the copyright owner).Several different TIFF-based
22、 metadata formats are commonly used in digital cameras, while XML-encoded metadata is commonly used in on-line image databases.The purposes of this part of ISO 12234 are, first, to define unambiguously a mapping for metadata properties that are most relevant to digital photography into XMP and, seco
23、nd, to document the meaning of each metadata item.This part of ISO 12234 is independent of the format of the image file, could be used inside any image file, and could be used in databases of image-related metadata.vi ISO 2016 All rights reservedBS ISO 12234-3:2016Electronic still picture imaging Re
24、movable memory Part 3: XMP for digital photography1 ScopeThis part of ISO 12234 defines an XMP namespace for the metadata used in digital photography applications that is formatted for exchange using the syntax of the XML and provides standard definitions of this metadata.2 Normative referencesThe f
25、ollowing documents, in 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 8601, Dat
26、a elements and interchange formats Information interchange Representation of dates and timesISO 12232, Photography Digital still cameras Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure indexISO 12234-2, Electronic still-picture imaging Remova
27、ble memory Part 2: TIFF/EP image data formatISO 14524, Photography Electronic still-picture cameras Methods for measuring opto-electronic conversion functions (OECFs)ISO 16684-1:2012, Graphic technology Extensible metadata platform (XMP) specification Part 1: Data model, serialization and core prope
28、rtiesISO/IEC 15444-1, Information Technology JPEG 2000 image coding system: Core coding systemISO/IEC 15444-2, Information Technology JPEG 2000 image coding system Extensions3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1Exifimage file format w
29、hich specifies the formats to be used for images, sound, and tags in digital still cameras standardized by CIPA (Camera and Imaging Products Association) and JEITA (Japan Electronics and Information Technology Industries Association)Note 1 to entry: Exif is abbreviation of “Exchangeable image file f
30、ormat for digital still cameras”.3.2namespaceset of unique names that are used to unambiguously label the elements in related data setsINTERNATIONAL STANDARD ISO 12234-3:2016(E) ISO 2016 All rights reserved 1BS ISO 12234-3:2016ISO 12234-3:2016(E)3.3propertynamed container for a metadata value at the
31、 top level of an XMP packetSOURCE: ISO 16684-1:2012, 3.53.4Uniform Resource IdentifierURIcompact sequence of characters that identifies an abstract or physical resourceSOURCE: ISO 16684-1:2012, 3.8 modified.4 Reference model and usage4.1 General considerationsFigure 1 summarizes the reference model
32、for this part of ISO 12234.This part of ISO 12234 defines metadata for digital photography and identifies the XMP namespaces used to encode this metadata.The metadata shall be encoded using the XMP data model and serialization defined in ISO 16684-1.The metadata includes a number of items that are d
33、efined in ISO 16684-1, in Reference 11 or in Reference 6 as indicated in the descriptions of the metadata items included in Clause 6.Figure 1 Reference model4.2 Native metadata properties and their usageFor Exif, TIFF, and JPEG 2000 file formats supported technical metadata items, only TIFF tags, Ex
34、if tags and/or JPEG 2000 boxes should be stored respectively when any one of these file formats is used 2 ISO 2016 All rights reservedBS ISO 12234-3:2016ISO 12234-3:2016(E)with the Photo XMP packet. These are Photo XMP properties in the dc:, tiff:, exif:, exifEX: and xmp: namespaces which are define
35、d in Clause 5.Refer to sections 4.2.2.1 and 4.2.3.1 of Reference 11 for details.5 XMP namespace5.1 GeneralThe XMP namespaces are described in this Clause. Since definitions from current XMP namespaces are used when these definitions are appropriate, metadata properties in this part of ISO 12234 are
36、subset of the properties in these namespaces. Users shall note interpretation from Photo XMP namespaces to these XMP namespaces is not always possible. A new namespace is used only when this is required in order to address newly defined metadata items.The namespaces in Table 1 shall be used, and the
37、 preferred namespace prefixes should be used.Table 1 Namespaces used in Photo XMP metadataName URI Recommended prefixDublin Core http:/purl.org/dc/elements/1.1/ dcExif 2.21 and Exif 2.3 http:/cipa.jp/exif/1.0/ exifEXExif 2.2 or earlier http:/ exifTIFF Rev. 6.0 http:/ tiffXMP http:/ xmpPhotoXMP http:
38、/imaging.org/pxmp/1.0/ pxmpNOTE For convenience in this part of ISO 12234, XMP names are commonly written in a prefix:local style; for example, dc:title. The relevant URI for the prefix used in this part of ISO 12234 is either explicit or clear from local context. Each URI in Table 1 is the XML name
39、space, not a URL pointing to a document available on the Internet.5.2 ExtensionsProperties and definitions for new metadata may be added to existing component and XMP namespaces if they do not cause problems for existing processors and applications of the metadata.The names and definitions of proper
40、ties in existing namespaces shall remain unchanged.If it is necessary to change the definition of a property, a new property shall be created, and the old one may be deprecated.A new version of a namespace and definitions with a new URI may be created so that there is no logical connection between t
41、he two versions and the same local name in two different namespaces refers to distinct properties and definitions.6 Metadata definitions6.1 Metadata listsPhoto XMP metadata items are defined in this Clause. A list of these items, along with a brief description and the XMP name, is given in Table 2.
42、ISO 2016 All rights reserved 3BS ISO 12234-3:2016ISO 12234-3:2016(E)Table 2 Photo XMP metadata listMetadata name Description XMP name TypeApertureValue Aperture value exif:ApertureValue RationalArtistPerson who captured the imagedc:creatorOrdered array of ProperNameBodySerialNumberSerial number of t
43、he digital camera used to capture the imageexifEX:BodySerialNumber Tex tCameraOwnerNameOwner of the camera used to capture the imageexifEX:CameraOwnerName ProperNameCaptureSetImage position within a set of captured imagespxmp:CaptureSet StructureCFAPatternColour filter array geometric pattern of the
44、 image sensorexif:CFAPattern CFA-PatternColourEncodingColour encoding informationpxmp:ColourEncodingClosed choice of IntegerCopyrightImage copyright holder and optional copyright statementdc:rights LanguageAlternativeDateTimeDigitizedDate and time when the image was stored as digital dataxmp:CreateD
45、ate DateDateTimeOriginalDate and time when the image was capturedexif:DateTimeOriginal DateDateTimeDate and time that the image was last modifiedxmp:ModifyDate DateDigitalZoomRatioDigital zoom ratio used to capture the imageexif:DigitalZoomRatio RationalEditorPerson(s) who edited the image filepxmp:
46、EditorOrdered array of ProperNameExposureBiasValueExposure bias in exposure valueexif:ExposureBiasValue RationalExposureIndexExposure index used by the camera to capture the imageexif:ExposureIndex RationalExposureProgramClass of camera exposure program used to capture the imageexif:ExposureProgramC
47、losed choice of IntegerFacesLocations of faces in the image, optionally includes the names of the facespxmp:Faces StructureFavoritesIdentifier of a “favourite” imagepxmp:FavoritesClosed choice of IntegerFlashState of camera illumination source used to capture the imageexif:Flash StructureFocalLength
48、Actual focal length of the lens used to capture the imageexif:FocalLength RationalFocalLengthIn35mm FilmIndicates the equivalent focal length assuming a 35 mm film cameraexif: FocalLengthIn35mmFilmInteger4 ISO 2016 All rights reservedBS ISO 12234-3:2016ISO 12234-3:2016(E)Metadata name Description XM
49、P name TypeGPSLocation of the camera used to captutre the imageexif:GPS StructureImageAspectRatioRatio of image width to image heightpxmp:ImageAspect RationalImageDescription Title of the image dc:description LangeageAlternativeImageLengthNumber of rows of pixels in the imagetiff:ImageLength IntegerImageTileSetImage position of a series of captured images of 1-D or 2-D panoramic seriespxmp:ImageTileSet ImageTileImageWidthNum
