ISO/TS 20498-4:2020

TECHNICAL ISO/TS
SPECIFICATION 20498-4
First edition
2020-10
Traditional Chinese medicine —
Computerized tongue image analysis
system —
Part 4:
Peripheral visual instruments
Médecine traditionnelle chinoise — Système d’analyse d’images
numérisées de la langue —
Partie 4: Instruments visuels périphériques
Reference number
ISO/TS 20498-4:2020(E)
©
ISO 2020

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ISO/TS 20498-4:2020(E)

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ii © ISO 2020 – All rights reserved

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ISO/TS 20498-4:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Performance . 2
4.1 Colour reproduction . 2
4.2 Display resolution . 2
4.3 Distortion . 2
4.4 Viewing environment . 3
Annex A (informative) sRGB values of colour chart . 5
Bibliography . 6
© ISO 2020 – All rights reserved iii

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ISO/TS 20498-4:2020(E)

Foreword
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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 developmen
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