JEC IEC62899-302-7 Edition 1.0 2025-11 INTERNATIONAL STANDARD Printedelectronics- Part 302-7: Equipment - Inkjet - Measurement methods of dot placement evaluationforprinted electronics IEC 62899-302-7:2025-11(en) ICS 19.080; 37.100.10 ISBN 978-2-8327-0821-7 THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright @ 2025 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembe [email protected] CH-1211 Geneva 20 www.iec.ch Switzerland AbouttheIEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. AboutIECpublications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IECpublicationssearch IEC Products &ServicesPortal-products.iec.ch webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary. variety.of criteria (reference number.text, technical With a subscription you will always have access to up to date committee,...)..It also gives information on projects, content tailored to your needs. replaced and withdrawn publications. Electropedia -www.electropedia.org IEC Just Published -webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology. Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English details all new publications released. Available online and and French, with equivalent terms in 25 additional languages. once a month by email. Also known as the international Electrotechnical Vocabulary (IEV) online. IEc Customer Service Centre -webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: [email protected] Warning! Make that obtained this from sure you publication an authorized distributor. IEC62899-302-7:2025@IEC2025 CONTENTS FOREWORD .3 INTRODUCTION. 5 Scope 6 1 2 Normative reference. .6 3 Terms,definitions,and abbreviated terms 6 Parameters and measurement methods . 4 4.1 General... 4.2 Environmental conditions. 4.3 Dot placement consideration 4.3.1 General ... 4.3.2 Evaluation. 8 4.4 Measurement methods 8 4.4.1 General 8 4.4.2 A printed example 8 4.4.3 Origin in a printer 9 4.4.4 Origin(s) on a medium. 13 4.5 Evaluation. 5 Report. Annex A (informative)Printing results.. .18 A.1 Examplesof printingresults .18 A.1.1 Printed result.. .18 A.1.2 Image data processing (see Annex B for detailed image processing). A.1.3 Image processing result. .20 A.2 Other experiments..... AnnexB (informative)Examples of imageprocessing. ..23 B.1 General. ..23 B.2 Imageprocessingfordotplacementmeasurement. B.2.1 General. ..23 B.2.2 Colour conversion (if needed). ..23 B.3 Image stitching. .25 B.3.1 General .25 B.3.2 Image stitching technology .26 Bibliography .29 Figure 1-Example of printed result.. Figure 2 - Example of processed image Figure 3 - Radius and circularity. ..11 Figure 4 - Example of a calculated dot and an expected dot. ..12 Figure 5 - Example of printed result on medium with origin(s)... ....13 Figure 6-Example of processed image. .14 Figure 7- Example of a calculated dot and an expected dot. .15 Figure A.1 - Example of printed result... Figure A.2-Exampleof processed data afterbinarization Figure A.3-Example of processed data after finding the circle(s) and centres.. .20 1 IEC62899-302-7:2025IEC2025 .21 Figure A.4-Printed