Traditional Chinese medicine -- Computerized tongue image analysis system

This document specifies the colour character and appearance of the colour chart used in a computerized tongue image analysis system (CTIS). This document excludes diagnostic or clinical comparison to the colour chart.

Médecine traditionnelle chinoise -- Système d’analyse d’images numérisées de la langue

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Status
Published
Publication Date
16-Apr-2020
Current Stage
6060 - International Standard published
Start Date
13-Mar-2020
Completion Date
17-Apr-2020
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ISO/TS 20498-3:2020 - Traditional Chinese medicine -- Computerized tongue image analysis system
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TECHNICAL ISO/TS
SPECIFICATION 20498-3
First edition
2020-04
Traditional Chinese medicine —
Computerized tongue image analysis
system —
Part 3:
Colour chart
Médecine traditionnelle chinoise — Système d’analyse d’images
numérisées de la langue —
Partie 3: Nuancier
Reference number
ISO/TS 20498-3:2020(E)
ISO 2020
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ISO/TS 20498-3:2020(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

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Published in Switzerland
ii © ISO 2020 – All rights reserved
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ISO/TS 20498-3:2020(E)
Contents Page

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Classification ............................................................................................................................................................................................................ 2

4.1 Colour chart without registration mark ............................................................................................................................ 2

4.2 Colour chart with registration mark .................................................................................................................................... 2

5 Technical requirements ................................................................................................................................................................................ 3

5.1 Accuracy of L*a*b* value ................................................................................................................................................................. 3

5.2 Colour patch size and margin ..................................................................................................................................................... 4

5.3 Optical transparency .......................................................................................................................................................................... 5

5.4 Usage of colour chart ......................................................................................................................................................................... 5

5.5 Printing condition ................................................................................................................................................................................ 5

Annex A (informative) Characteristics of each colour patch and the usage of the colour chart .............6

Annex B (informative) sRGB values of colour chart .............................................................................................................................. 7

Annex C (informative) Printing condition of each colour patch............................................................................................... 8

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2020 – All rights reserved iii
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ISO/TS 20498-3:2020(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 249, Traditional Chinese medicine.

A list of all the parts in the ISO 20498 series can be found on the ISO website.

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
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TECHNICAL SPECIFICATION ISO/TS 20498-3:2020(E)
Traditional Chinese medicine — Computerized tongue
image analysis system —
Part 3:
Colour chart
1 Scope

This document specifies the colour character and appearance of the colour chart used in a computerized

tongue image analysis system (CTIS).
This document excludes diagnostic or clinical comparison to the colour chart.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes 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
colour chart

apparatus which consists of an array of 24 single-colour patches used for the evaluation of colour

reproduction of CTIS
3.2
colour space
geometric representation of colours in space, usually of three dimensions
[SOURCE: CIE Publication 17.4, 845-03-25]
3.3
CIELAB colour difference
CIE 1976 L*a*b* colour difference

difference between two colour stimuli defined as the Euclidean distance between the points

representing them in L*a*b* colour space
[SOURCE: CIE publication 17.4, 845-03-55, 56]
3.4
margin
area beyond the colour patch in the colour chart
© ISO 2020 – All rights reserved 1
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ISO/TS 20498-3:2020(E)
4 Classification
4.1 Colour chart without registration mark

The order of colours in the colour chart and the example printed on paper using arbitral ink, dye and

paint are shown in Figure 1.

NOTE The numbers listed in the figure represent the order of colours in this colour chart.

Figure 1 — The colour chart without registration mark
4.2 Colour chart with registration mark

The order of colours in the colour chart and the example printed on paper using arbitral ink, dye and

paint with registration mark are shown in Figure 2.
2 © ISO 2020 – All rights reserved
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ISO/TS 20498-3:2020(E)

NOTE The numbers listed in the figure represent the order of colours in this colour chart.

Figure 2 — The colour chart with registration
...

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