ISO/IEC INTERNATIONAL STANDARD 19794-2 First edition 2005-09-15 Information technology Biometric data interchange formats - Part 2: Finger minutiae data Technologies de Il'informationFormats d'échange de donnees biometriques- Partie 2: Données du point caracteristique du doigt Reference number ISO/EC 19794-2:2005(E) ISO IEC @ISO/IEC 2005 Copyright International Organization for Standardization Not for Resale ISO/IEC 19794-2:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO/IEC2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's memberbody in the country of the requester. ISO copyright office Case postale 56. CH-1211Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland yhematinaganzainfandardizatio @ISO/IEC2005-All rightsreserved vithout license from IHS Not for Resale ISO/IEC 19794-2:2005(E) Contents Page Foreword. Introduction 1 Scope. 2 Conformance.. 3 4 Termsanddefinitions 5 Symbols and abbreviated terms .... 6 Minutiae Extraction .... 6.1 Principle .. 6.2 Minutia Type 6.3 Minutia Location. 6.3.1 Coordinate System... 6.3.2 Minutia Placement on a Ridge Ending (encoded as Valley Skeleton Bifurcation Point) 6.3.3 Point). 6.3.4 Minutia Placement on a Ridge Skeleton Endpoint . 6.3.5 Minutia Placement on Other Minutia Types .... 6.4 Minutia Direction ........... 6.4.1 Angle Conventions ... 6.4.2 Minutia Direction of a Ridge Ending (encoded as Valley Skeleton Bifurcation Point) 6.4.3 Minutia Direction of a Ridge Bifurcation (encoded as Ridge Skeleton Bifurcation Point) 6.4.4 MinutiaDirectionofaRidgeSkeletonEndPoint.. 6.5 Core and Delta Placement and Direction .... 6.6 Minutia Type Matching ... 0 6.7 Encoding of multibyte quantities.. 10 7 Finger Minutiae Record Format 11 7.1 Introduction. .11 7.2 Record Organization.. 11 7.3 Record Header 7.3.1 Format Identifier. 7.3.2 Version Number 7.3.3 Length of Record, 7.3.4 CaptureEquipmentCertifications 7.3.5 Capture Device Type ID.. 12 7.3.6 Size of Scanned Image in X direction .. 12 7.3.7 Size of Scanned Image in Y direction 7.3.8 X (horizontal) resolution .... 7.3.9 Y (vertical) resolution ... 7.3.10 Number Of Finger Views .12 7.3.11 Reserved Byte...... 12 7.4 Single Finger Record Format... 7.4.1 Finger Header.. 7.4.2 Finger Minutiae Data.. 7.5 .14 7.5.1 Common Extended Data Fields .15 7.5.2 Ridge Count Data Format.... .15 7.5.3 Core and Delta Data Format.. 17 7.5.4 Zonal Quality Data ... .19 7.6 Minutia Record Format Summary 21 Copyrght International Organizanfrstandardization All rightsreserved ili nse from IHS Not for Resale ISO/IEC 19794-2:2005(E) 8 Finger Minutiae Card Format. 22 8.1 Normal Size Finger Minutiae Format.. .22 8.2 Compact Size Finger Minutiae Format . .22 8.3 Number of Minutiae, Minutiae Ordering Sequence and Truncation. .23 8.3.1 General Aspects.... .23 8.3.2 Biometric matching algorithm parameters .23 8.3.3 Number of Minutiae.... .23 8.3.4 Minutiae Order... .24 8.4 Usage of additional features for the card format. .26 8.4.1 Data objects for additional features 8.4.2 Ind