INTERNATIONAL ISO/IEC STANDARD 20027 First edition 2018-07 Information technology - Guidelines for slap tenprint fingerprintture Titre manque Reference number IEC IS0/IEC 20027:2018(E) @IS0/IEC 2018 IS0/IEC 20027:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0/IEC 2018 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2018 - All rights reserved IS0/IEC 20027:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 4 Sensor hardware requirement .2 5 Acquisition software .2 5.1 Acquisition process .2 5.2 Userfeedback 2 5.3 Acquisition check 3 5.4 Image processing .3 5.4.1 Resolution. 3 5.4.2 Segmentation 3 5.4.3 Compression 4 6 Logging and evaluation of data .4 6.1 Logging data .4 6.2 Useful statistical evaluations ..5 7 Operational process ..5 7.1 General user guidance 7.2 Acquisition process recommendations. ..8 8 Operational issues. .10 8.1 Placementrecommendations. .10 8.2 Calibration recommendations. .10 8.3 Cleaning recommendations. .11 8.4 Operator recommendations. ..11 Annex A (informative) Example of an acquisition process ..12 Annex B (informative) Example of an acquisition process based on composite records ..13 Annex C (informative) Example of a quality assurance process for the build of a composite record. ..15 Bibliography. .16 @ IS0/IEC 2018 - All rights reserved ii