ISO/IEC INTERNATIONAL STANDARD 15938-14 First edition 2018-02 Information technology Multimedia content description interface - Part 14: Reference software, conformance and usage guidelines for compact descriptors for visual search Technologies de I'information - Interface de description du contenu multimédia Partie 14: Logiciels de reference, conformite et lignes directrices pour I'utilisation des descripteurs compacts pour recherche visuelle Reference number IEC IS0/IEC 15938-14:2018(E) Copyright International Organization for Standardization @IS0/IEC 2018 Nof for Resale anyan/2 license from IHS IS0/IEC 15938-14:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC 2018, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org @ IS0/IEC 2018 - All rights reserved icensee=Nanyang Technological Univ/5926867100, User=JACKEY, MA No reproductic r networking permitted without license from IHS IS0/IEC 15938-14:2018(E) Contents Page Foreword ..iv Introduction. ... 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and abbreviated terms .2 4.1 General .2 4.2 Abbreviations. .2 4.3 Arithmetic operations 2 4.4 Logical operators. .2 4.5 Relational operators. .3 4.6 Bitwise operators. .3 4.7 Assignment. 3 4.8 Setoperators .3 4.9 Constants .3 4.10 Functions. .4 5 Reference software ..4 5.1 Reference software location ..4 5.2 Reference software license. ..4 5.3 Reference software documentation 5.4 Reference software compilation ..4 5.5 Reference software architecture .4 6 Conformance testing.. .5 6.1 Conformance image data set and reference CDv bitstreams .5 6.2 Conformance test conditions. .5 6.2.1 General. 5 6.2.2 Global descriptor test .6 6.2.3 Interest point test.. .6 6.2.4 Local descriptor test. .6 7 Usage guidelines .7 7.1 Overview .7 7.2 Pairwise matching. .7 7.2.1 Overview .7 7.2.2 Global descriptor matching .8 7.2.3 Local descriptors matching 7.2.4 Image match decision. ..11 7.2.5 Homography estimation for localization ..13 7.3 Retrieval .14 7.3.1 Overview. ..14 7.3.2 Shortlist generation. ..14 7.3.3 Geometric reranking. .15 pytneatonalAll rights reerved iii JACKEY, MA nitted without license from IHS