ISO/TS 18621-22:2024

Graphic technology — Image quality evaluation methods for printed matter — Part 22: Evaluation of colour graininess

This document defines a process independent measurement method for the evaluation of graininess of printed products. It provides requirements for the test form and measurement devices to be used as well as the formulas to compute the colour graininess score (SCG).

Technologie graphique — Méthodes d’évaluation de la qualité d’image pour les imprimés — Partie 22: Titre manque

General Information

• Status: Published
• Publication Date: 14-May-2024
• ICS: 37.100.10 - Reproduction equipment
• Technical Committee: ISO/TC 130 - Graphic technology
• Drafting Committee: ISO/TC 130 - Graphic technology
• Current Stage: 6060 - International Standard published
• Start Date: 15-May-2024
• Due Date: 08-Sep-2024
• Completion Date: 15-May-2024

Standards Content (Sample)

Technical
Specification
ISO/TS 18621-22
First edition
Graphic technology — Image quality
2024-05
evaluation methods for printed
matter —
Part 22:
Evaluation of colour graininess
Reference number
ISO/TS 18621-22:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO/TS 18621-22:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/TS 18621-22:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Principles .2
4.2 Apparatus .2
4.3 Procedure .2
4.3.1 Testform .2
4.3.2 Printing and measuring .2
4.4 Evaluation .3
4.5 Reporting .4
Annex A (informative) Interpreting graininess, S . 6
CG
Annex B (informative) Spatial filter . 7
Bibliography . 9

© ISO 2024 – All rights reserved
iii

---------------------- Page: 3 ----------------------
ISO/TS 18621-22:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of
...

FINAL DRAFT
Technical
Specification
ISO/DTS 18621-22
ISO/TC 130
Graphic technology — Image quality
Secretariat: SAC
evaluation methods for printed
Voting begins on:
matter —
2023-12-27
Part 22:
Voting terminates on:
2024-02-21
Evaluation of colour graininess
Member bodies are requested to consult relevant national interests in ISO/IEC
JTC 1/SC 28 before casting their ballot to the e-Balloting application.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DTS 18621-22:2023(en) © ISO 2023

---------------------- Page: 1 ----------------------
FINAL DRAFT
ISO/DTS 18621-22:2023(en)
Technical
Specification
ISO/DTS 18621-22
ISO/TC 130
Graphic technology — Image quality
Secretariat: SAC
evaluation methods for printed
Voting begins on:
matter —
Part 22:
Voting terminates on:
Evaluation of colour graininess
Member bodies are requested to consult relevant national interests in ISO/IEC
JTC 1/SC 28 before casting their ballot to the e-Balloting application.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2023
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DTS 18621-22:2023(en) © ISO 2023

© ISO 2023 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/DTS 18621-22:2023(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Principles .2
4.2 Apparatus .2
4.3 Procedure .2
4.3.1 Testform .
...

ISO/TC 130 N 5094
ISO/DTS 18621-22:2023(X)
ISO/TC 130/JWG 14
ISO/TC 130
Secretariat:  SAC
Date: 2023-12-11-
Graphic technology — Image quality evaluation methods for
printed matter —
Part 22:
Evaluation of colour graininess
Graphic technology — Image quality evaluation methods for
printed matter — Part 22: Evaluation of colour graininess

DTS stage

Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to
change without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.


© ISO #### – All rights reserved

---------------------- Page: 1 ----------------------
ISO #####-#:####(X)
A model document of an International Standard (the Model International Standard) is available at:
https://www.iso.org/drafting-standards.html

2 © ISO #### – All rights reserved

---------------------- Page: 2 ----------------------
© ISO 20XX
© ISO #### – All rights reserved

---------------------- Page: 3 ----------------------
Error! Reference source not found.
© ISO 2023
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
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
Error! Reference source not found.
iv

---------------------- Page: 4 ----------------------
Error! Reference source not found.
Contents Page
Foreword . vii
Introduction . ix
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Principles . 2
4.2 Apparatus . 2
4.3 Procedure . 3
4.3.1 Testform . 3
4.3.2 Printing and measuring . 3
4.4 Evaluation . 3
4.5 Reporting . 7
Annex A (informative) Interpreting graininess, S . 8
CG
Annex B (informative) Spatial filter . 9
Bibliography. 12

Foreword iv
Introduction v
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Requirements 2
4.1 Principles 2
4.2 Apparatus 2
4.3 Procedure 2
4.3.1 Testform 2
4.3.2 Printing and Measuring 3
4.4 Evaluation 3
4.5 Reporting 4
Annex A (informative) interpret
...