ISO/TS 18621-31:2024

Graphic technology — Image quality evaluation methods for printed matter — Part 31: Evaluation of the perceived resolution of printing systems with the Contrast–Resolution chart

This document specifies the Contrast–Resolution test chart, the requirements on the printing process needed to reproduce this test chart, the required characteristics of a high resolution scanner needed to digitize the information reproduced on printed test charts, and the requirements on the interpretation of this digitized data. It also specifies the resolution-score method for evaluating the perceptual resolution of printed material using the Contrast–Resolution test chart. The procedure specified in this document is intended for a characterization of the perceived resolution of a graphic arts production printing system using the Contrast–Resolution test chart.

Technologie graphique — Méthodes d’évaluation de la qualité d’image pour les imprimés — Partie 31: Évaluation de la résolution perçue des systèmes d’impression avec un graphique de contraste–résolution

General Information

• Status: Published
• Publication Date: 11-Jan-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: 12-Jan-2024
• Due Date: 09-Nov-2024
• Completion Date: 12-Jan-2024

Relations

• Revises: ISO/TS 18621-31:2020 - Graphic technology — Image quality evaluation methods for printed matter — Part 31: Evaluation of the perceived resolution of printing systems with the Contrast–Resolution chart
• Effective Date: 06-Jun-2022

Standards Content (Sample)

FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 18621-31
ISO/TC 130
Graphic technology — Image quality
Secretariat: SAC
evaluation methods for printed
Voting begins on:
2023-10-10 matter —
Voting terminates on:
Part 31:
2023-12-05
Evaluation of the perceived resolution
of printing systems with the Contrast–
Resolution chart
Technologie graphique — Méthodes d’évaluation de la qualité
d’image pour les imprimés —
Partie 31: Évaluation de la résolution perçue des systèmes
d’impression avec un graphique de contraste–résolution
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
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DTS 18621-31:2023(E)
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. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/DTS 18621-31:2023(E)
FINAL
TECHNICAL ISO/DTS
DRAFT
SPECIFICATION 18621-31
ISO/TC 130
Graphic technology — Image quality
Secretariat: SAC
evaluation methods for printed
Voting begins on:
matter —
Voting terminates on:
Part 31:
Evaluation of the perceived resolution
of printing systems with the Contrast–
Resolution chart
Technologie graphique — Méthodes d’évaluation de la qualité
d’image pour les imprimés —
Partie 31: Évaluation de la résolution perçue des systèmes
d’impression avec un graphique de contraste–résolution
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.
COPYRIGHT PROTECTED DOCUMENT
© 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DTS 18621-31:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/DTS 18621-31:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
4.1 General . 3
4.2 Apparatus requirements .
...

ISO /TC 130 N 5007
ISO/DTS 18621-31
ISO /TC 130/ JWG14
Secretariat: SAC
Date: 2023-0809-20
Graphic technology — Image quality evaluation methods for
printed matter —
Part 31:
Evaluation of the perceived resolution of printing systems with
the Contrast–Resolution chart
Technologie graphique — Méthodes d’évaluation de la qualité d’image pour les imprimés —
Partie 31: Évaluation de la résolution perçue des systèmes d’impression avec un graphique de contraste–
résolution
FDIS stage

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ISO/TS 18621-31:2020(E)
© ISO 20202023
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'sISO’s member body in the country of the requester.
ISO Copyright Office copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
E-mail: [e-mail]
Website: www.iso.org www.iso.org
Published in Switzerland.
© ISO 2020 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/DTS 18621-31:2020(E)
Contents Page
Foreword .3
Introduction . vii
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Requirements .3
4.1 General .3
4.2 Apparatus requirements .3
4.2.1 Printing system requirements.3
4.2.2 Scanning system requirements .3
4.3 Procedure.4
4.3.1 Test chart .4
4.3.2 Evaluation intent .4
4.3.3 Printing and scanning .6
4.3.4 Evaluation process .6
5 Resolution-Score processing .6
5.1 General .6
5.2 Element identification .7
5.3 Scanning signal interpretation .7
5.4 Spatial filtering .
...