BS IS0/IEC 16466:2025 BSI Standards Publication Information technology 3D printing and scanning Assessment methods of 3D scanned data use in 3D printing bsi. BSIS0/IEC 16466:2025 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0/IEC 16466:2025 The UK participation in its preparation was entrusted to Technical Committee ICT/1/1, Information Systems development. A list of organizations represented on this committee can be obtained on request to its committee manager. Contractual and legal considerations This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BsI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and This publication is provided as is, and is to be used at the recipient's own risk. The recipient is advised to consider seeking professional guidance with respect to its use of this publication. This publication is not intended to constitute a contract. Users are responsible for its correct application. @ The British Standards Institution 2025 Published by BSI Standards Limited 2025 ISBN9780539228038 ICS 35.020 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2025. Amendments/corrigenda issued since publication Date Text affected BS IS0/IEC 16466:2025 IEC International OSI Standard ISO/IEC 16466 Information technology - First edition 3D printing and scanning 2025-08 Assessment methods of 3D scanned data use in 3D printing Reference number ISO/IEC 16466:2025(en) ?ISO/IEC2025 BSISO/IEC 16466:2025 IS0/IEC 16466:2025(en) COPYRIGHTPROTECTEDDOCUMENT @IS0/IEC2025 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 below or Iso's member body inthe country ofthe requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0/IEC 2025 - All rights reserved i BS IS0/IEC 16466:2025 IS0/IEC 16466:2025(en) Contents Page Foreword .iv Introduction V 1 Scope. 1 Normative references 1 3 Terms, definitions and abbreviated terms. 1 3.1 Terms and definitions. .1 3.2 Abbreviated term... .2 4 Assessment 3 4.1 General. .3 4.1.1 Background ..3 4.1.2 Published standards and metrics of assessment. .4 4.2 Types of errors in image segmentation of 3D scanned data. 10 4.2.1 General. .10 4.2.2 Typical examples of each type of error. .10 5 Approach to assessments .10 5.1 General. .10 5.2 Region of Intertest/Volume of Interest .11 5.3 Image enhancement and image normalization ..11 5.4 Surface modelling and pre-processing (smoothing and averaging) .11 Assessment for segmentation of 2D images ..11 6 6.1 General ..1 6.2 Workflow and product quality .11 6.3 Assessment methods for image-based modelling/segmentation phase 12 6.3.1 Region-based measure/spatial overlap based metrics; Sensitivity, Specificity, False-positive rate, False negative rate FNR, F-Measure FMS, Dice similarity coefficient, Jaccard index. 12 6.3.2 Volume-based measure; Volume similarity, Volume overlap error, Volume difference .13 6.3.3 Probabilistic Distances Between Segmentation/Cross-correlation matrix measure; Interclass correlation (ICC), AUC, Cohen kappa coefficient .13 6.3.4 Distance-based measure/Spatial distance-based metrics; Hausdorff distance (HD, Maximum Surface Distance), Mahalanobis distance. 13 7 Assessment for 3D modelled images .13 7.1 General .13 7.2 Surface Distance-based Measure: Hausdorff distance, Average distance, Mean Absolute