ISO/IEC 29109-6:2011

INTERNATIONAL ISO/IEC
STANDARD 29109-6
First edition
2011-10-01
Information technology — Conformance
testing methodology for biometric data
interchange formats defined in
ISO/IEC 19794 —
Part 6:
Iris image data
Technologies de l'information — Méthodologie d'essai de conformité
pour les formats d'interéchange de données biométriques définis dans
l'ISO/CEI 19794 —
Partie 6: Données d'image d'iris

Reference number
©
ISO/IEC 2011
©  ISO/IEC 2011
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ii © ISO/IEC 2011 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 29109-6 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 37, Biometrics.
ISO/IEC 29109 consists of the following parts, under the general title Information technology — Conformance
testing methodology for biometric data interchange formats defined in ISO/IEC 19794:
 Part 1: Generalized conformance testing methodology
 Part 2: Finger minutiae data
 Part 4: Finger image data
 Part 5: Face image data
 Part 6: Iris image data
 Part 7: Signature/sign time series data
 Part 8: Finger pattern skeletal data
 Part 9: Vascular image data
 Part 10: Hand geometry silhouette data
Finger pattern spectral data, signature/sign processed dynamic data, voice data, and DNA data will form the
subjects of future parts.
© ISO/IEC 2011 – All rights reserved iii

Introduction
ISO/IEC 19794-6:2005 specifies a data record interchange format for recording, storing, and transmitting one
or more iris images within a Common Biometric Exchange Formats Framework (CBEFF) data structure. Each
image is accompanied by image-specific metadata contained in a header record. This part of ISO/IEC 29109
establishes tests for checking the correctness of the binary record.
The objective of ISO/IEC 19794-6:2005 cannot be completely achieved until biometric products can be tested
to determine whether they conform to those specifications. Conforming implementations are a necessary
prerequisite for achieving interoperability among implementations; therefore there is a need for a standardized
conformance testing methodology, test assertions, and test procedures as applicable to specific modalities
addressed by each part of ISO/IEC 19794. The test assertions will cover as much as practical of the
ISO/IEC 19794-6:2005 requirements (covering the most critical features), so that the conformity results
produced by the test suites will reflect the real degree of conformity of the implementations to
ISO/IEC 19794-6:2005 data interchange format records. This is the motivation for the development of this
conformance testing methodology.
This part of ISO/IEC 29109 supports those applications that require use of iris image data according to
ISO/IEC 19794-6:2005. It defines a testing methodology to assure conformance of a vendor's application or
service to the base ISO/IEC 19794-6:2005 specification. Thus, this part of ISO/IEC 29109 is intended to:
 establish elements of the conformance testing methodology framework that are specific to the iris
image-based data record requirements of ISO/IEC 19794-6:2005 conformance testing,
 define requirements and guidelines for specifying conformance test suites and related test methods for
measuring conformity of products and services to the iris image data record requirements of
ISO/IEC 19794-6:2005, and
 define testing and reporting procedures to be followed before, during, and after conformance testing.
This part of ISO/IEC 29109 is applicable to the development and use of conformity test method specifications,
conformity test suites for ISO/IEC 19794-6:2005 records, and conformance testing programs for
ISO/IEC 19794-6:2005 conformant products. It is intended primarily for use by testing organizations, but may
be applied by developers and users of test method specifications and test method implementations.
iv © ISO/IEC 2011 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 29109-6:2011(E)

Information technology — Conformance testing methodology
for biometric data interchange formats defined in
ISO/IEC 19794 —
Part 6:
Iris image data
1 Scope
This part of ISO/IEC 29109 specifies elements of conformance testing methodology, test assertions, and test
procedures as applicable to ISO/IEC 19794-6:2005.
This part of ISO/IEC 29109 establishes
 test assertions of the structure of the iris image data format as specified in ISO/IEC 19794-6:2005
(Type A Level 1 as defined in ISO/IEC 29109-1:2009),
 test assertions of internal consistency by checking the types of values that may be contained within each
field (Type A Level 2 as defined in ISO/IEC 29109-1:2009).
This part of ISO/IEC 29109 does not establish tests of
 conformance of CBEFF structures required by ISO/IEC 19794-6:2005,
 semantic assertions (Type A Level 3 as defined in ISO/IEC 29109-1:2009),
 other characteristics of biometric products or other types of testing of biometric products (e.g. acceptance,
performance, robustness, security),
 tests of conformance of systems that do not produce ISO/IEC 19794-6:2005 records.
2 Conformance
Biometric data interchange format Conformance Test Suites (CTS) conform to this part of ISO/IEC 29109 if
they satisfy all of the normative requirements related to Clause 6 for one of the subformats defined in the base
standard. Specifically, they shall use the test methodology specified in Clauses 6, 7 and 8 of
ISO/IEC 29109-1:2009, and all Level 1 and Level 2 tests shall use the assertions defined in Table 2 or Table 3
of Clause 6 in this part of ISO/IEC 29109.
Implementations of ISO/IEC 19794-6:2005 tested according to the methodology specified shall be able to
claim conformance only to those Biometric Data Record (BDR) requirements specified in
ISO/IEC 19794-6:2005 that are tested by the test methods established by this methodology.
© ISO/IEC 2011 – All rights reserved 1

Implementations of ISO/IEC 19794-2:2005 do not necessarily need to conform to all possible aspects of
ISO/IEC 19794-6:2005, but only to those ISO/IEC 19794-6:2005 requirements that are claimed to be
supported by the implementation in an Implementation Conformance Statement, filled out in accordance with
Clause 8 of ISO/IEC 29109-1:2009 and Table 1 of Clause 6 in this part of ISO/IEC 29109.
NOTE See that Level 3 and higher are not tested.
3 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO/IEC 19794-2:2005, Information technology — Biometric data interchange formats — Part 2: Finger
minutiae data
ISO/IEC 19794-6:2005, Information technology — Biometric data interchange formats — Part 6: Iris image
data
ISO/IEC 29109-1:2009, Information technology — Conformance testing methodology for biometric data
interchange formats defined in ISO/IEC 19794 — Part 1: Generalized conformance testing methodology
4 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 29109-1:2009 apply.
5 Symbols and abbreviated terms
For the purposes of this part of ISO/IEC 29109, the symbols and abbreviated terms given in ISO/IEC 29109-1
apply.
6 Conformance testing methodology
6.1 General
The testing methodology specified in Clauses 6, 7 and 8 of ISO/IEC 29109-1:2009 shall apply. The content of
the tables below is based on the conformance testing methodology outlined in ISO/IEC 29109-1 and shall only
be used in the context of that testing methodology.
6.2 Table of requirements in the base standard
The normative requirements of ISO/IEC 19794-6:2005 are listed in Table 1. The supplier of the IUT can
explain which optional components of the standard are supported and the testing laboratory can note the
results of the test.
2 © ISO/IEC 2011 – All rights reserved

Table 1 — Requirements of the Base Standard, ISO/IEC 19794-6:2005.
Rectilinear (R) and polar (P) subformats.
Req Ref. in Requirement summary Level Status Subfor IUT Supp Test
uire base mat Supp orted resul
men Std. Applic ort range t
t ID abiliity
R   P
The Iris Record shall begin with the three ASCII
R-01 6.5.1 characters “IIR” followed by a zero byte as a NULL 1 M Y Y

string terminator
Test that Format Identifier is a big-endian encoded
R-02 6.5.1 1 M Y Y
value
The version number shall consist of three ASCII
numerals followed by a zero byte as a NULL string
terminator. The first and second character will
R-03 6.5.1 1 M Y Y
represent the major revision number and the third
character will represent the minor revision number.
The version number of this specification shall be
0x30313000; “010” – Version 1 revision 0.
Test that version number is a big-endian encoded
R-04 6.5.1 1 M Y Y
value
The length in bytes for the entire record shall be
R-05 6.5.1 1 M Y Y
recorded here.
This count shall match the number of total bytes read.
R-06 6.5.1 2 M Y Y
This count shall match the sum of the lengths of the
R-07 6.5.1 2 M Y Y
record's biometric subtypes and images.
The capture device type ID shall be recorded in twelve
R-08 6.5.1 1 M Y Y
bits.
The total number of iris views shall be recorded in
R-09 6.5.2 1 M Y Y
bytes 2-3.
The total number of iris views shall match the number
R-10 6.5.2 2 M Y Y
of views contained in the record.
The record header length in bytes shall be 45.
R-11 6.5.1 1 M Y Y
R-12 6.5.1 The image property bit-field shall contain a valid value. 1 M Y Y
6.3.2.5, These two bits shall encode whether the images in the
R-13 1 M Y Y
6.5.1 record are horizontally flipped.
6.3.2.5, These two bits shall encode whether the images in the
R-14 1 M Y Y
6.5.1 record are vertically flipped.
6.3.2.5 These two bits shall encode the scan type for the
R-15 1 M Y N
6.5.1 images in this record.
6.3.2.4 This bit shall encode whether iris occlusions are
R-16 1 M N Y
6.5.1 embedded in the polar images of this record.
6.3.2.4 This bit shall indicate whether occlusions are marked
R-17 1 M N Y
6.5.1 using the lowest or the highest possible gray value.
6.3.2.2, This bit shall encode whether the inner and outer iris
R-18 6.3.2.3 boundaries were extracted and used to create the 1 M N Y

6.5.1 polar images in this record (segmented polar image).
This field shall contain the expected iris diameter if
R-19 6.5.1 1 M Y N
specified.
This field shall encode the image format and
R-20 6.5.1 1 M Y Y
compression.
6.2.2, Start markers shall be present at the beginning of
R-21 6.2.3, each data blob of the record unless the image format 2 M Y Y

6.2.4 is raw.
This field shall specify the width of the images in this
R-22 6.5.1 1 M Y Y
record if the image format is raw.
This field shall specify the height of the images in this
R-23 6.5.1 1 M Y Y
record if the image format is raw.
This field shall specify the pixel depth in bits per colour
R-24 6.5.1 1 M Y Y
channel.
This field shall indicate whether the standard polar
6.5.1,
R-25 transformation described in the base standard was 1 M N Y

6.3.2.7
used to create the polar images in this record.
This field shall contain the Device Unique Identifier.
R-26 6.5.1 1 M Y Y
This field shall encode the biometric subtype (left, right
R-27 6.5.2 1 M Y Y
or undefined)
This field shall state the number of images for the
R-28 6.5.2 1 M Y Y
biometric subtype.
© ISO/IEC 2011 – All rights reserved 3

Table 1 (continued)
Req Ref. in Requirement summary Level Status Subfor IUT Supp Test
uire base mat Supp orted resul
men Std. Applic ort range t
t ID abiliity
R   P
The actual number of images found for this biometric
R-29 6.5.2 subtype shall match the number in the biometric 2 M Y Y

subtype header.
This field shall contain the counter of the current
R-30 6.5.3 1 M Y Y
image within the biometric subtype.
It shall be in the range of valid counter values.
R-31 6.5.3 2 M Y Y
This field shall contain the quality value of the iris
R-32 6.5.3 1 M Y Y
image; it shall be in the range between 0 and 100.
6.3.1.2, This field shall encode the rotation angle of the iris in
R-33 1 M Y N
6.5.3 the rectilinear image if known.
This field shall contain the UNDEF value for the
R-34 6.5.3 rotation angle. Polar images sha
...