ISO/IEC 23008-12:2022

Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 12: Image File Format

This document specifies the Image File Format, an interoperable storage format for a single image, a collection of images, and sequences of images. The format defined in this document is built on tools defined in ISO/IEC 14496-12 and enables the interchange, editing, and display of images, as well as the carriage of metadata associated with those images. The Image File Format defines structures used to contain metadata, how to link that metadata to the images, and defines how metadata of certain forms is carried. This document also specifies brands for the storage of images and image sequences conforming to High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), JPEG, Versatile Video Coding (VVC) and Essential Video Coding (EVC). NOTE The storage of HEVC, AVC, VVC and EVC video sequences is out of scope and is provided in ISO/IEC 14496‑15.

Technologies de l'information — Codage à haute efficacité et livraison des medias dans des environnements hétérogènes — Partie 12: Format de fichier d'image

General Information

• Status: Published
• Publication Date: 28-Sep-2022
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Current Stage: 9092 - International Standard to be revised
• Start Date: 08-Feb-2024
• Completion Date: 08-Feb-2024

Relations

• Revised: ISO/IEC FDIS 23008-12 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 12: Image File Format
• Effective Date: 17-Feb-2024
• Revises: ISO/IEC 23008-12:2017/Amd 1:2020 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 12: Image File Format — Amendment 1: Support for predictive image coding, bursts, bracketing and other improvements
• Effective Date: 06-Jun-2022
• Revises: ISO/IEC 23008-12:2017 - Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 12: Image File Format
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 23008-12
Second edition
2022-09
Information technology — MPEG
systems technologies —
Part 12:
Image File Format
Technologies de l'information — Technologies des systèmes MPEG —
Partie 12: Format de fichier d'image
Reference number
© ISO/IEC 2022
© ISO/IEC 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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© ISO/IEC 2022 – All rights reserved

Contents Page
Foreword . vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 5
4 Overview . 6
5 General requirements . 6
5.1 General requirements on files . 6
5.2 General requirements on readers. 7
5.3 Multi-purpose files . 7
5.4 Other boxes . 7
6 Single image and image collection .7
6.1 General . 7
6.2 Derivation from the ISO base media file format . 7
6.3 Derivation of an output image of an image item . 8
6.4 Roles of images . 8
6.4.1 General . 8
6.4.2 Hidden images . 8
6.4.3 Cover image . . 9
6.4.4 Thumbnail images . 9
6.4.5 Auxiliary images . 9
6.4.6 Master images . 9
6.4.7 Pre-derived coded images . 9
6.4.8 Multi-layer images . 9
6.4.9 Predictively coded image items . 10
6.5 Image properties . 10
6.5.1 General . 10
6.5.2 Decoder configuration and initialization . 11
6.5.3 Image spatial extents . 11
6.5.4 Pixel aspect ratio .12
6.5.5 Colour information .12
6.5.6 Pixel information .13
6.5.7 Relative location . 14
6.5.8 Image properties for auxiliary images . 14
6.5.9 Clean aperture . 15
6.5.10 Image rotation . 15
6.5.11 Layer selection . 16
6.5.12 Image mirroring . 17
6.5.13 Image scaling . 17
6.5.14 Content light level . 18
6.5.15 Mastering display colour volume . 19
6.5.16 Content colour volume . 19
6.5.17 Required reference types . 19
6.5.18 Creation time information . 20
6.5.19 Modification time information . 21
6.5.20 User description . 21
6.5.21 Accessibility text .22
6.5.22 Auto Exposure Information . 22
6.5.23 White balance information . 23
6.5.24 Focus information . 24
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© ISO/IEC 2022 – All rights reserved

6.5.25 Flash exposure information . 24
6.5.26 Depth of field information . 25
6.5.27 Panorama information .25
6.5.28 Sub-sample information . 26
6.5.29 Target output layer set . 27
6.5.30 Wipe transition effect . 27
6.5.31 Zoom transition effect .29
6.5.32 Fade transition effect .30
6.5.33 Split transition effect .30
6.5.34 Suggested transition period . 32
6.5.35 Suggested time display duration . 32
6.5.36 Ambient viewing environment . 33
6.6 Derived images and derived image items. 33
6.6.1 General . 33
6.6.2 Derived image types and derived image item types .34
6.7 Image metadata . 36
6.8 Entity and sample groups .36
6.8.1 Relating an untimed item to a timed sequence .36
6.8.2 Burst images . 37
6.8.3 'tsyn' entity group .38
6.8.4 'iaug' entity group .38
6.8.5 'ster' entity grouping . 39
6.8.6 Bracketed sets/logically group of images at capture-time .
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