1、Januar 2013 Normenausschuss Informationstechnik und Anwendungen (NIA) im DINPreisgruppe 13DIN Deutsches Institut fr Normung e. V. Jede Art der Vervielfltigung, auch auszugsweise, nur mit Genehmigung des DIN Deutsches Institut fr Normung e. V., Berlin, gestattet.ICS 03.160; 35.240.15Zur Erstellung ei
2、ner DIN SPEC knnen verschiedene Verfahrensweisen herangezogen werden: Das vorliegende Dokument wurde nach den Verfahrensregeln einer Vornorm erstellt.!$5“1881856www.din.deDDIN CEN/TS 16428Profile fr die biometrische Interoperabilitt Optimales Vorgehen bei Erfassung aller Finger mittels gleichzeitige
3、mAuflegen;Englische Fassung CEN/TS 16428:2012Biometric Interoperability profiles Best Practices for slap tenprint captures;English version CEN/TS 16428:2012Interoperabilit des profils biomtriques Recommandations pour la capture de dix empreintes digitales plat;Version anglaise CEN/TS 16428:2012Allei
4、nverkauf der Spezifikationen durch Beuth Verlag GmbH, 10772 Berlin www.beuth.deGesamtumfang 22 SeitenDIN SPEC 66278DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 2 Nationales Vorwort Dieses Dokument (CEN/TS 16428:2012) wurde von der Arbeitsgruppe Biometrie“ des Technischen Komitee CEN/TC 224 Maschinenles
5、bare Karten und zugehrige Gerteschnittstellen und Verfahren“ erarbeitet, dessen Sekretariat vom AFNOR (Frankreich) gehalten wird. Im DIN ist der Arbeitsausschuss Biometrie“ im Normenausschuss Informationstechnik und Anwendungen (NIA) zustndig. DIN CEN/TS 16428, entsprechend DIN SPEC 66278, hat den C
6、harakter einer Vornorm bzw. einer DIN-Spezifikation (DIN SPEC). Eine DIN SPEC nach dem Vornorm-Verfahren ist das Ergebnis einer Normungsarbeit, das wegen bestimmter Vorbehalte zum Inhalt oder wegen des gegenber einer Norm abweichenden Aufstellungsverfahrens vom DIN noch nicht als Norm herausgegeben
7、wird. Zur vorliegenden DIN SPEC wurde kein Entwurf verffentlicht. Erfahrungen mit dieser DIN SPEC sind erbeten vorzugsweise als Datei per E-Mail an niadin.de in Form einer Tabelle. Die Vorlage dieser Tabelle kann im Internet unter http:/www.din.de/stellungnahme abgerufen werden; oder in Papierform a
8、n den Normenausschuss Informationstechnik und Anwendungen (NIA) im DIN. Das Prsidium des DIN hat mit seinem Beschluss 1/2004 festgelegt, dass von dem in den Regeln der europischen Normungsarbeit von CEN/CENELEC verankerten Grundsatz, wonach Europische Normen in den drei offiziellen Sprachen Deutsch,
9、 Englisch, Franzsisch verffentlicht werden, in begrndeten Ausnahmefllen abgewichen und auf die deutsche Sprachfassung verzichtet werden kann. DIN CEN/TS 16428 spricht Empfehlungen aus bezglich des optimalen Vorgehens bei Erfassung aller 10 Finger mittels gleichzeitigem Auflegen innerhalb eines vorge
10、gebenen Zeitrahmens. DIN CEN/TS 16428 macht dazu Empfehlungen z. B. betreffend die zu verwendende Hardware, die Vorgehensweise des Anwenders, das Registrierungsverfahren, die Weiterbearbeitung, Komprimierung und Codierung der erfassten Fingerabdruckbilder, die Ereignisprotokollierung und die Ergebni
11、sbewertung. DIN CEN/TS 16428 macht ferner an Entwickler und Systemintegratoren von Anwendungssoftware gerichtete Empfehlungen. TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16428 October 2012 ICS 35.240.15 English Version Biometrics Interoperability profiles Best Pra
12、ctices for slap tenprint captures Interoprabilit des profils biomtriques Recommandations pour la capture de dix empreintes digitales plat Profile fr die biometrische Interoperabilitt Optimales Vorgehen bei Erfassung aller Finger mittels gleichzeitigem Auflegen This Technical Specification (CEN/TS) w
13、as approved by CEN on 27 August 2012 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European
14、 Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final
15、decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irela
16、nd, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue M
17、arnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 16428:2012: E CEN/TS 16428:2012 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Sensor hardware requirement 5 3 Acquisition software .5 4 Logging and eva
18、luation of data 7 5 Operational process 9 6 Operational issues 12 Annex A (informative) Example of acquisition process . 15 Annex B (informative) Example of an acquisition process based on composite records 16 Annex C (informative) Example of a quality metric for the acquisition process . 19 Bibliog
19、raphy . 20 DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 3 Foreword This document (CEN/TS 16428:2012) has been prepared by Technical Committee CEN/TC 224 “Personal identification, electronic signature and cards and their related systems and operations”, the secretariat of which is
20、held by AFNOR. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standar
21、ds organisations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
22、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 4 1 Scope The main goal of this Technical Specification is to give guidelines to follow d
23、uring the acquisition process of slap tenprints in order to obtain fingerprints with the best quality possible in acceptable time constraints. NOTE Non-cooperative users are out of the scope of this Technical Specification. When using ten-fingerprint sensors, it is fundamental to know how to use the
24、m and how to proceed during the acquisition. This Technical Specification describes how to capture fingerprints correctly by specifying best practices for slap ten-print captures. This Technical Specification gives guidance on the following topics: 1) Recommendations on the hardware of the fingerpri
25、nt sensor and its deployment, 2) Recommendations on user guidance, 3) Recommendations on the enrolment process including a sample workflow, 4) Recommendations for developers and system integrators on application software, 5) Recommendations on processing, compression and coding of the acquired finge
26、rprint images, 6) Recommendations on operational issues and data logging, 7) Recommendations on the evaluation of a solution and its components. Although this Technical Specification primarily focuses on reaching optimal data quality for enrolment purposes, the recommendations given here are applica
27、ble for other purposes. All processes which rely on good quality tenprint slaps can take advantage of the best practices reported here. DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 5 2 Sensor hardware requirement Image quality should comply with the quality specifications from ISO
28、/IEC 19794-4:2011 1. EBTS/F corresponds to Annex B.1 and BSI TR-03121 corresponds to Annex B.3 of ISO/IEC 19794-4:2011 1. NOTE 1 This Technical Specification considers optical sensors based on the principle of total internal reflection. However, this does not mean that other technologies cannot be u
29、sed for tenprint enrolment purposes. As soon as sufficient experiences are available and recommendations can be given on emerging technologies, they will be included in a future version of this document. The sensor device should provide methods for re-calibration in the field by qualified service st
30、aff if the device technically supports it. It is recommended that the compliance of a sensor device to the applicable quality standard can be verified at any time in the operational environment. NOTE 2 The need for calibration or re-calibration depends on the sensor technology and calibration might
31、not be necessary for all devices. 3 Acquisition software 3.1 Acquisition process For the acquisition process, the highest quality images should be used. The acquisition of these images should be done automatically. The sequence of images having the highest quality should be used; if a timeout has oc
32、curred then these may be below the desired quality levels. An example for an acquisition process design can be found in Annexes A and B, an example for a quality metric can be found in Annex C. 3.2 User feedback The presence of a user interface is strongly advised to give feedback to the user. Feedb
33、ack can be given, for example, by: A screen attached in close neighbourhood to the sensor, Illuminated pictograms on the sensor, LEDs assigned to pictograms directly on the sensor. The following information should be given to the user: Assistance to finger positioning with images and/or video on the
34、 screen and/or audio instructions (for instance to instruct the user to move its fingers to the left/right/top/bottom), Visual and/or audio notification when a successful acquisition has been completed, A Quality indicator for each acquisition. This indicator should be simple, for example a two-stat
35、e logic (not good/good) or similar, If possible, the reason for a bad quality acquisition (e.g. wrong positioning of the hand). DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 6 Additional information (e.g. a poster or a video) can be used to illustrate to users how to use the system
36、. This information can be displayed close to the sensor and additionally in the waiting zone. Operators should be trained to give guidance to the users. 3.3 Acquisition check The software linked to the sensor should take account of the following during the acquisition process in order to perform a b
37、etter acquisition: Any feedback provided by the sensor software (background correction, quality evaluation, end of acquisition, etc.), A timeout for capturing the best available image in case the specified quality threshold is not reached, The inability of the subject to provide a full set of finger
38、prints. Acceptable images for certain fingers may not have been captured. This can be due to missing fingers, inability for the subject to interact with the sensor correctly, temporary or permanent issues with the subjects fingerprints. The image quality of the captured images. This is to enable the
39、 system to finish the acquisition process after the preset quality level or a timeout has been reached, The subjects fingers have been removed from the sensor at the end of the acquisition process, All two consecutively captured slaps and captured thumbs are not identical. A duplicate check should a
40、lso be performed to ensure that all expected fingers have been captured once and once only, NOTE Due to computational time constraints this recommendation could also be enforced by the operator instead of the software. Residual traces have not been acquired, The fingerprint images are as originally
41、acquired. Optionally, segmented images can be produced, Hand inversion between left and right slap has not occurred. This check can be based on the different physical characteristics of the shapes of both hands. 3.4 Image processing 3.4.1 Segmentation Independently of physical resolution of the sens
42、or and the image acquired, the resolution of the fingerprint image should be at least 197 ppcm (500 ppi) and, therefore, can differ from the scan resolution. Depending on the call to capture one, two, three or four fingerprints, this number of individual fingerprints should be extracted from the inp
43、ut image and provided as single fingerprints generated by a segmentation process which takes into account fingers reported to be missed. DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 7 For this segmentation process, the following criteria should be fulfilled: Ability to accept rota
44、ted fingerprints having the same direction in an angle up to 45 Rotated fingerprints having the same direction should be corrected to be vertical Segment the first part over the finger (first phalanx) Segmentation should be performed on uncompressed data. Recommended size for fingerprint images is g
45、iven in ISO/IEC 19794-4:2011, D.1. NOTE Size limitation is done in order to prevent performance issues. 3.4.2 Compression Fingerprint images should be compressed according to the recommendations in ISO/IEC 19794-4:2011, section 8.3.17 “Image compression algorithm”. NOTE 1 The compression ratio shoul
46、d not be too high, a maximum compression ratio of 15 is recommended. NOTE 2 The WSQ compression is mainly used for fingerprint compression; it has been optimized to be compatible with minutiae calculation. The implementation of the used WSQ algorithm should be certified by the FBI and should be refe
47、renced by the respective certificate number (coded in the WSQ header). Multiple lossy compressions should be avoided as they harm image quality. 4 Logging and evaluation of data 4.1 General Logging and evaluation data might be subject to European Union or national legal constraints and should be han
48、dled accordingly. 4.2 Logging data The purpose of the logging data is not to track people but to give guidance to the staff in charge of the enrollment and to maintain a constant quality of the acquisition process. The following data, or parts of it, should be logged: Transaction ID Timestamp of acq
49、uisition Duration of biometric acquisition process Number of captured images Number of successful captures Quality scores for all captured fingerprints Overall quality score of captured slap or ten prints sets (if present) DIN CEN/TS 16428 (DIN SPEC 66278):2013-01 CEN/TS 16428:2012 (E) 8 Information about vendor, software, hardware and versions Information about the origin (e.g. Agency Identifier) Information about errors (e.g. about uniqueness check, segment
