Image technology colour management — Evaluating colour transform accuracy in ICC profiles

This document describes procedures for evaluating the accuracy of colorimetric rendering intents in ICC profiles. It applies to v4 ICC profiles made according to ISO 15076-1. It does not apply to subjective tests of ICC profiles, such as for perceptual or saturation rendering intents, and it does not apply to high dynamic range colour media or spaces.

Titre manque

Barvno upravljanje upodobitvenih tehnologij - Vrednotenje natančnosti barvne pretvorbe v ICC-profilih

General Information

Status
Published
Publication Date
26-Jan-2020
Current Stage
6060 - International Standard published
Start Date
27-Jan-2020
Completion Date
27-Jan-2020

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TECHNICAL ISO/TS
SPECIFICATION 23564
First edition
2020-01
Image technology colour
management — Evaluating colour
transform accuracy in ICC profiles
Reference number
ISO/TS 23564:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO/TS 23564:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced 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 ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 23564:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms, definitions and abbreviated terms ................................................................................................................................ 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Abbreviated terms ............................................................................................................................................................................... 2

4 Profile evaluation tests .................................................................................................................................................................................. 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Round trip tests ...................................................................................................................................................................................... 2

4.3 Device model tests ............................................................................................................................................................................... 3

5 Round trip accuracy .......................................................................................................................................................................................... 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Test image ................................................................................................................................................................................................... 3

5.3 Round trip test ........................................................................................................................................................................................ 3

6 Accuracy of forward/inverse model ................................................................................................................................................. 4

Annex A (informative) Applicability of the forward model metric ....................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/TS 23564:2020(E)
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 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 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

described 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 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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO 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 of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 130, Graphic technology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/TS 23564:2020(E)
Introduction

International Color Consortium (ICC) input and output profiles contain transforms between device

data encodings and the ICC Profile Connection Space (PCS). These transforms should provide either an

accurate colour match or a pleasing rendering, depending on the chosen rendering intent.

The following guidelines are provided to assist in the evaluation of the colorimetric rendering intent

transforms in ICC v4 profiles. Any tolerances provided in this document are for guidance only and may

not be suitable for all applications.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/TS 23564:2020(E)
Image technology colour management — Evaluating colour
transform accuracy in ICC profiles
1 Scope

This document describes procedures for evaluating the accuracy of colorimetric rendering intents in

ICC profiles.
It applies to v4 ICC profiles made according to ISO 15076-1.

It does not apply to subjective tests of ICC profiles, such as for perceptual or saturation rendering

intents, and it does not apply to high dynamic range colour media or spaces.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 15076-1, Image technology colour management — Architecture, profile format and data structure —

Part 1: Based on ICC.1:2010
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purpose of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1.1
AToB1Tag

structure in an ICC profile that encodes the forward model in media-relative colorimetry

3.1.2
BToA1Tag

structure in an ICC profile that encodes the inverse model in media-relative colorimetry

3.1.3
chromaticAdaptationTag

invertible matrix which converts a CIE XYZ colour, measured using the actual illumination conditions

and relative to the actual adopted white, to a CIE XYZ colour relative to the PCS adopted white with

complete adaptation
3.1.4
colour lookup table
array of values corresponding to the ou
...

SLOVENSKI STANDARD
SIST-TS ISO/TS 23564:2020
01-april-2020
Barvno upravljanje upodobitvenih tehnologij - Vrednotenje natančnosti
barvne pretvorbe v ICC-profilih
Image technology colour management - Evaluating colour transform accuracy in ICC
profiles
Ta slovenski standard je istoveten z: ISO/TS 23564:2020
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
37.100.01 Grafična tehnologija na Graphic technology in
splošno general
SIST-TS ISO/TS 23564:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST-TS ISO/TS 23564:2020
---------------------- Page: 2 ----------------------
SIST-TS ISO/TS 23564:2020
TECHNICAL ISO/TS
SPECIFICATION 23564
First edition
2020-01
Image technology colour
management — Evaluating colour
transform accuracy in ICC profiles
Reference number
ISO/TS 23564:2020(E)
ISO 2020
---------------------- Page: 3 ----------------------
SIST-TS ISO/TS 23564:2020
ISO/TS 23564:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced 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 ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
SIST-TS ISO/TS 23564:2020
ISO/TS 23564:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms, definitions and abbreviated terms ................................................................................................................................ 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Abbreviated terms ............................................................................................................................................................................... 2

4 Profile evaluation tests .................................................................................................................................................................................. 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Round trip tests ...................................................................................................................................................................................... 2

4.3 Device model tests ............................................................................................................................................................................... 3

5 Round trip accuracy .......................................................................................................................................................................................... 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Test image ................................................................................................................................................................................................... 3

5.3 Round trip test ........................................................................................................................................................................................ 3

6 Accuracy of forward/inverse model ................................................................................................................................................. 4

Annex A (informative) Applicability of the forward model metric ....................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST-TS ISO/TS 23564:2020
ISO/TS 23564:2020(E)
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 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 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

described 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 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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO 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 of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 130, Graphic technology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
SIST-TS ISO/TS 23564:2020
ISO/TS 23564:2020(E)
Introduction

International Color Consortium (ICC) input and output profiles contain transforms between device

data encodings and the ICC Profile Connection Space (PCS). These transforms should provide either an

accurate colour match or a pleasing rendering, depending on the chosen rendering intent.

The following guidelines are provided to assist in the evaluation of the colorimetric rendering intent

transforms in ICC v4 profiles. Any tolerances provided in this document are for guidance only and may

not be suitable for all applications.
© ISO 2020 – All rights reserved v
---------------------- Page: 7 ----------------------
SIST-TS ISO/TS 23564:2020
---------------------- Page: 8 ----------------------
SIST-TS ISO/TS 23564:2020
TECHNICAL SPECIFICATION ISO/TS 23564:2020(E)
Image technology colour management — Evaluating colour
transform accuracy in ICC profiles
1 Scope

This document describes procedures for evaluating the accuracy of colorimetric rendering intents in

ICC profiles.
It applies to v4 ICC profiles made according to ISO 15076-1.

It does not apply to subjective tests of ICC profiles, such as for perceptual or saturation rendering

intents, and it does not apply to high dynamic range colour media or spaces.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 15076-1, Image technology colour management — Architecture, profile format and data structure —

Part 1: Based on ICC.1:2010
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purpose of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1.1
AToB1Tag
structure in
...

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