ISO/IEC 39794-2:2023

Information technology — Extensible biometric data interchange formats — Part 2: Finger minutiae data

This document specifies: — generic extensible data interchange formats for the representation of finger minutia data: — a tagged binary data format based on an extensible specification in ASN.1, — a textual data format based on an XML schema definition that is capable of holding the same information as the tagged binary format, and — an on-card biometric comparison format based on extensible TLV encoding; — on-card biometric comparison parameters based on extensible TLV encoding for constructing valid probe data in the on-card biometric comparison format; — examples of data record contents; — application-specific requirements, recommendations and best practices in determining minutiae location, direction and type; and — conformance test assertions and conformance test procedures applicable to this document. NOTE Whereas ISO/IEC 39794-4 covers finger, palm, toe and foot image data, this document covers only finger minutiae and is not applicable to palms, toes or feet.

Technologies de l'information — Formats extensibles d'échange de données biométriques — Partie 2: Titre manque

General Information

• Status: Published
• Publication Date: 20-Sep-2023
• ICS: 35.240.15 - Identification cards. Chip cards. Biometrics
• Technical Committee: ISO/IEC JTC 1/SC 37 - Biometrics
• Drafting Committee: ISO/IEC JTC 1/SC 37/WG 3 - Biometric data interchange formats
• Current Stage: 6060 - International Standard published
• Start Date: 21-Sep-2023
• Due Date: 04-Jun-2023
• Completion Date: 21-Sep-2023

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 39794-2
First edition
2023-09
Information technology — Extensible
biometric data interchange formats —
Part 2:
Finger minutiae data
Reference number
ISO/IEC 39794-2:2023(E)
© ISO/IEC 2023

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ISO/IEC 39794-2:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2023
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO/IEC 2023 – All rights reserved

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ISO/IEC 39794-2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.4
5 Conformance . 4
6 Modality-specific information . .5
6.1 Purpose . 5
6.2 Minutia description . 5
6.3 Minutia kind . 5
6.3.1 General . 5
6.3.2 Unique minutia . 5
6.3.3 Encoding trifurcations . 5
6.4 Minutia location . 6
6.4.1 General . 6
6.4.2 Coordinate system . 6
6.4.3 Minutia location of a ridge ending (encoded as valley skeleton bifurcation
point) . 6
6.4.4 Minutia location of a ridge bifurcation .
...

DRAFT INTERNATIONAL STANDARD
ISO/IEC DIS 39794-2
ISO/IEC JTC 1/SC 37 Secretariat: ANSI
Voting begins on: Voting terminates on:
2022-05-24 2022-08-16
Information technology — Extensible biometric data
interchange formats —
Part 2:
Finger minutiae data
ICS: 35.240.15
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
This document is circulated as received from the committee secretariat.
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/IEC DIS 39794-2:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO/IEC 2022

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ISO/IEC39794-2:2022
ISO/IECJTC1/SC37/WG3
ISO/IEC DIS 39794-2:2022(E)
Date: 2022-02-19
Information technology —Extensible biometricdatainterchange
formats—Part2:Fingerminutiae data
DISstage
Warning forWDsand CDs
This documentis notan ISOInternationalStandard.Itis distributedfor reviewandcomment.Itis subjectto
changewithout noticeandmaynot bereferredtoasanInternationalStandard.
Recipients ofthis draftare invited to submit,with theircomments,notification ofany relevantpatentrightsof
whichthey are aware andtoprovide supporting documentation.
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022
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: [phone]
Email: [e-mail]
Website: www.iso.org
© ISO2022–All rightsreserved
Published in Switzerland
ii
 © ISO/IEC 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC DIS 39794-2:2022(E)
Contents
Foreword . vi
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 capture device spatial sampling rate . 2
3.2 image spatial sampling rate . 2
3.3 palm . 2
3.4 fingerprint image . 2
3.5 friction ridge . 2
3.6 minutia . 2
3.7 typeline . 3
3.8 delta . 3
3.9 core . 3
3.10 4-neighbour of a pixel p . 3
3.11 4-path from pixel p0 to pixel pn .
...