ISO/IEC 19794-6:2011/Amd 1:2015

INTERNATIONAL ISO/IEC
STANDARD 19794-6
Second edition
2011-10-01
AMENDMENT 1
2015-10-01
Information technology — Biometric
data interchange formats —
Part 6:
Iris image data
AMENDMENT 1: Conformance testing
methodology and clarification of defects
Technologies de l’information — Formats d’échange de données
biométriques —
Partie 6: Données d’image de l’iris
AMENDEMENT 1: Méthodologie d’essai de conformité et
clarification des défauts
Reference number
ISO/IEC 19794-6:2011/Amd.1:2015(E)
©
ISO/IEC 2015
ISO/IEC 19794-6:2011/Amd.1:2015(E)

© ISO/IEC 2015, Published in Switzerland
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ii © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Contents Page
Foreword . iv
Annex A (normative) Conformance Testing Methodology . 4
A.1 Introduction . 4
A.2 Table of requirements . 4
A.3 Table of test assertions . 19
A.3.1 Level 1 and Level 2 conformance assertions for common requirements . 15
A.3.2 Level 1 and Level 2 specific conformance assertions for Type 01 data format . 23
A.3.3 Level 1 and Level 2 specific conformance assertions for Type 02 data format . 25
A.3.4 Level 1 and Level 2 specific conformance assertions for Type 03 data format . 27
A.3.5 Level 1 and Level 2 specific conformance assertions for Type 07 data format . 29
A.3.6 Test Notes . 31
A.3.7 Additional information about image file formats (informative) . 36
© ISO/IEC 2015 – All rights reserved iii

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
Amendment 1 to ISO/IEC 19794-6:2011 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information Technology, Subcommittee SC 37, Biometrics.

iv © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Information Technology — Biometric data interchange
formats — Part 6: Iris image format
Amendment 1: Conformance testing methodologies and clarification of
defects
1. The following text is to be added to the "Introduction" clause of ISO/IEC 19794-6:
Annex A of this International Standard is distinct from the ISO/IEC 29109-6 which addressed conformance
testing only of the first, 2005, edition of the ISO/IEC 19794-6. The normative Annex A of this International
Standard addresses conformance testing of data formats specified in this International Standard (i.e. second
edition of 19794-6).
2. The following text is to be added to the "Scope" clause of ISO/IEC 19794-6:
This part of ISO/IEC 19794 also specifies elements of conformance testing methodology, test assertions, and
test procedures as applicable to this part of ISO/IEC 19794. It establishes test assertions pertaining to the
structure of the iris image data format as specified in Clause 6, 7 and 8 of this part of ISO/IEC 19794 (Type A
Level 1 as defined in ISO/IEC 19794-1/Amd 1:2013), test assertions pertaining to internal consistency by
checking the types of values that may be contained within each field (Type A Level 2 as defined in ISO/IEC
19794-1/Amd 1:2013), and semantic test assertions (Type A Level 3 as defined in ISO/IEC 19794-1/Amd
1:2013.
The conformance testing methodology specified in this part of ISO/IEC 19794 does not establish
 tests of 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 data records conforming to the requirements of
this part of ISO/IEC 19794.
3. The following text is to be added to the "Conformance" clause of ISO/IEC 19794-6:
Biometric data interchange format conformance tests conform to this part of ISO/IEC 19794 if they satisfy all
of the normative requirements set forth in clause 8. Specifically, they shall use the test methodology specified
in Clauses A.1, A.2 and A.3 of ISO/IEC 19794-1/Amd 1:2013, and all Level 1, Level 2 and Level 3 tests shall
use the assertions defined in Table A.2 of Clause A.3 of this part of ISO/IEC 19794 in conformity with the
concept and rules set in 19794-1 Annex A1.
Implementations of this part of ISO/IEC 19794 tested according to the specified methodology shall be able to
claim conformance only to those biometric data record (BDR) requirements specified in this part of ISO/IEC
19794 that are tested by the test methods established by this methodology.
Implementations of this part of ISO/IEC 19794 do not necessarily need to conform to all possible aspects of
this part of ISO/IEC 19794, but only to those requirements that are claimed to be supported by the
implementation in an implementation conformance statement (ICS), filled out in accordance with Clause A.3 of
ISO/IEC 19794-1/Amd 1:2013 and tables of Clause A.3 of this part of ISO/IEC 19794.
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ISO/IEC 19794-6:2011/Amd.1:2015(E)

4. The following referenced document is to be added to clause "Normative References" of ISO/IEC 19794-6:
 ISO/IEC 19794-1:2011 – Information Technology – Biometric data interchange formats – Part 1:
Framework. Amendment 1: Generalized Conformance Testing Methodology

5. In clause 6.1 of ISO/IEC 19794-6:2011, Table 1, delete title "compression", replace "Mode" with
"Compression mode", replace "method" with "Data encoding method", and replace all appearances of "n/a"
with "RAW"
6. In clause 6.5.1 of ISO/IEC 19794-6:2011, remove 2nd sentence: "At least one region shall be masked."

st
7. In clause 6.5.1 of ISO/IEC 19794-6:2011, add to the end of the 1 paragraph the following text:
In the Cropped and Masked Iris Image type, the image regions outside of the iris itself shall be masked with
uniform pixel values in order to increase compressibility and to ensure that coding bytes are allocated
maximally to the iris texture itself.
Pixels in the sclera shall be replaced uniformly with the value 200.
Furthermore, when upper and/or lower eyelids are detected within the cropped image, then pixels in these
eyelid regions and beyond shall be replaced with the value 128 such that normal methods for detecting and
fitting such eyelid boundaries in unmasked images may continue to function with the Cropped and Masked Iris
Image type. Note that none, one or both of the upper or lower eyelids may occlude the iris (see Figure 3). In
all these cases, the pixels in the sclera shall be replaced uniformly with the value 200, and if eyelid regions are
detected, pixels in those regions and beyond shall be replaced with the value 128.

8. In clause 6.5.2 of ISO/IEC 19794-6:2011, change "The sclera mask shall extend to the first and last
columns unless the upper and lower eyelids touch there." with "The sclera mask shall extend to the first and
last columns unless the extremes of the upper and lower eyelids meet inside the left or right image boundary."

9. In clause 6.5.3 of ISO/IEC 19794-6:2011, change Figure 3 with the following one:
2 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)

(a) (b)
(c) (d)
Figure 3 - Examples of Cropped and Masked iris images. (a) Iris occluded by both eyelids. (b) Iris
occluded by the upper eyelid and not the lower eyelid. (c) Iris occluded by the lower eyelid and not the
upper eyelid. (d) Iris is not occluded by eyelids

10. Replace Annex A of ISO/IEC 19794-6:2011 with the following one:

© ISO/IEC 2015 – All rights reserved 3

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Annex A
(normative)
Conformance Testing Methodology
A.1 Introduction
The testing methodology specified in ISO/IEC 19794-1:2011 AMD 1 shall apply. The content of the tables
below is based on the conformance testing methodology outlined in ISO/IEC 19794-1:2013 AMD 1 and shall
only be used in the context of that testing methodology.
A.2 Table of requirements
The normative requirements of ISO/IEC 19794-6:2011 Biometric Data Interchange Formats – Part 6 - iris
Image Data are listed in Table A.1 (Table A.1 extends over multiple pages). The supplier of the IUT shall
explain which optional components of the standard are supported and the testing laboratory shall note the
results of the test.
NOTE TO ISO EDITOR: it is required to repeat the title of all tables in this document wherever the table
extends over multiple pages.
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table A.1 — Table of requirements for data formats
Applicable to format type
Reference
Requirement IUT Supported Test
in Data Requirement Summary Level Status
Type Type Type Type
ID Support Range Result
Format
01 02 03 07
Table3
R-1. The format identifier shall be recorded in four bytes. 1 M Y Y Y Y
row 1
The format identifier shall consist of three characters "IIR",
Table3
R-2. standing for iris image record, followed by a zero byte as a 1 M Y Y Y Y
row 1
NULL string terminator.
The number for the version of that part of ISO/IEC 19794 used
Table3
R-3. for constructing the iris image data record shall be placed in 1 M Y Y Y Y
row 2
four bytes.
This version number shall consist of three ASCII numerals
followed by a zero byte as a NULL string terminator. The first
Table3
R-4. and second character will represent the major version number 1 M Y Y Y Y
row 2
(‘0’,’2’) and the third character will represent the minor revision
number (‘0’).
Table3 The length (in bytes) of the entire iris image data record shall
R-5. 1 M Y Y Y Y
row 3 be recorded in four bytes.
Table 3
R-6. The length of record shall be a value between 69 and (2-1) 1 M Y Y Y Y
row 3
Table3 This count shall be the total length of the data block including
R-7. 2 M Y Y Y Y
row 3 the iris record header and one or more representation records.
Table3 The total number of iris representations in the record shall be
R-8. 1 M Y Y Y Y
row 4 recorded in two bytes.
Table 3 The total number of iris representations in the record shall be a
R-9. 1 M Y Y Y Y
row 4 number between 1 and 65535
Table3
R-10. A minimum of one representation is required. 2 M Y Y Y Y
row 4
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 3 The number of iris representations shall be equal to the number
R-11. 2 M Y Y Y Y
row 4 of representations present in the record
Table 3
R-12. The certification flag shall be composed of one single byte 1 M Y Y Y Y
row 5
Table 3 The certification flag shall be a 00 value, as no certification
Hex
R-13. 1 M Y Y Y Y
row 5 blocks are expected
Table 3
R-14. There shall not be a certification data block within the register. 2 M Y Y Y Y
row 5
Table 3
R-15. The number of eyes represented shall be recorded in one byte 1 M Y Y Y Y
row 6
Table 3 The number of eyes represented shall be a number between 0
R-16. 1 M Y Y Y Y
row 6 and 2
Table 3 The number of eyes represented shall be 1 if the eye label for
R-17. 2 M Y Y Y Y
row 6 all representations has the same value, being either 1 or 2
The number of eyes represented shall be 2 if the eye label for
Table 3 all representations has a value of 1 or 2, and within all
R-18. 2 M Y Y Y Y
row 6 representations are one or some of them with the value of 1
and the rest with the value of 2
The number of eyes represented shall be 0 if the eye label of
Table 3
R-19. any of the representations is declared to be undefined (i.e. its 2 M Y Y Y Y
row 6
value is 0)
R-20. 7.1 All data shall be stored in network byte (big-endian) order. 1 M Y Y Y Y
Where bit-level data definitions are specified, bit 1 shall be
R-21. 7.1 1 C Y Y Y Y
interpreted as the least significant bit
R-22. 7.2 The record shall contain images from a single individual 3C O1 Y Y Y Y
The iris image biometric data record shall have an iris general
R-23. 7.2 1 M Y Y Y Y
header and at least the information about one image.
R-24. 7.2 The record shall contain images from one or two eyes. 3C O1 Y Y Y Y
The iris image biometric data record shall have an iris record
header that contains information about the number of images
R-25. 7.3 2 M Y Y Y Y
that follow, the number of eyes represented and the total
length, plus other information stated in Table 3.
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
A Representation Header shall precede each representation
R-100. 7.2 providing information for that representation. There shall be 1 M Y Y Y Y
one header for each representation contained in the BDIR.
Table 4 For each image representation, the representation length shall
R-101. 1 M Y Y Y Y
row 1 be coded as an integer value in 4 bytes
Table 4 Any representation length shall have a value between 53 and
R-102. 1 M Y Y Y Y
row 1 ((2 -1)-16)
For each image representation, the representation length shall
be the number of bytes between the end of the previous
Table 4 representation (or the general header for the first
R-103. 2 M Y Y Y Y
row 1 representation in the record), and the beginning of the next
representation (or the end of the record for the last
representation in the record)
Table 4
R-104. The capture date field shall be encoded in nine bytes 1 M Y Y Y Y
row 2
Table 4 The coding of the capture date field shall be in the format
R-105. 1 M Y Y Y Y
row 2 defined in ISO/IEC 19794-1
Table 4 The Gregorian calendar year of the capture date and time field
R-106. 1 M Y Y Y Y
row 2 shall be encoded in the form given in ISO/IEC 19794-1.
Table 4 The month of the capture date and time field shall be encoded
R-107. 1 M Y Y Y Y
row 2 in the form given in ISO/IEC 19794-1.
Table 4 The day of the capture date and time field shall be encoded in
R-108. 1 M Y Y Y Y
row 2 the form given in ISO/IEC 19794-1.
Table 4 The hour of the capture date and time field shall be encoded in
R-109. 1 M Y Y Y Y
row 2 the form given in ISO/IEC 19794-1.
Table 4 The minute of the capture date and time field shall be encoded
R-110. 1 M Y Y Y Y
row 2 in the form given in ISO/IEC 19794-1.
Table 4 The second of the capture date and time field shall be encoded
R-111. 1 M Y Y Y Y
row 2 in the form given in ISO/IEC 19794-1.
Table 4 The millisecond of the capture date and time field shall be
R-112. 1 M Y Y Y Y
row 2 encoded in the form given in ISO/IEC 19794-1.
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
The capture date and time field shall indicate when the capture
Table 4
R-113. of this representation started in Coordinated Universal Time 3C O1 Y Y Y Y
row 2
(UTC).
Table 4 The capture device technology identifier shall be coded in one
R-114. 1 M Y Y Y Y
row 3 single byte
Table 4 The capture device technology identifier shall have a value of 0
R-115. 1 M Y Y Y Y
row 3 or 1
The capture device technology identifier shall have a value of
Table 4
R-116. 00 when the capture device technology is unknown or 3C O1 Y Y Y Y
Hex
row 3
unspecified.
The capture device technology ID shall indicate the class of
Table 4
R-117. capture device technology used to acquire the captured 3C O1 Y Y Y Y
row 3
biometric sample.
Table 4
R-118. The capture device vendor ID shall be coded in 2 bytes 1 M Y Y Y Y
row 4
Table 4 The capture device vendor ID shall be registered with the IBIA
R-119. 2 M Y Y Y Y
row 4 or other approved registration authority.
Table 4 A value of all zeros for capture device vendor ID shall indicate
R-120. 1 M Y Y Y Y
row 4 that the capture device vendor is unreported.
Table 4 The capture device vendor ID shall identify the biometric
R-121. 3C O1 Y Y Y Y
row 4 organization that owns the product that created the record.
Table 4
R-122. The capture device type ID field shall be coded in 2 bytes 1 M Y Y Y Y
row 5
Table 4 The capture device type ID shall be registered with the IBIA or
R-123. 1 M Y Y Y Y
row 5 other approved registration authority.
Table 4 A value of all zeros for capture device type ID shall indicate that
R-124. 1 M Y Y Y Y
row 5 the capture device type is unreported.
Table 4 The capture device type ID shall identify the product type that
R-125. 3C O1 Y Y Y Y
row 5 created the record
Table 4 If no quality information is present, the quality block shall be
R-126. 1 M Y Y Y Y
row 6 coded in one byte
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 4 If no quality information is present, the length field in the quality
R-127. 1 M Y Y Y Y
row 6 block shall be 0
If there is quality information within the representation, the
Table 4
R-128. quality block shall be coded as m bytes where m = (5*N+1) 1 M Y Y Y Y
row 6
bytes, and N is the number of quality scores reported
Table 4 If there are N quality scores reported in the quality information
R-129. 2 M Y Y Y Y
row 6 block, then the quality length field shall be equal to N
Table 4 The quality block shall consist of a length field followed by zero
R-130. 1 M Y Y Y Y
row 6 or more quality sub-blocks.
Table 4 In the quality block, the length field shall consist of one byte
R-131. 1 M Y Y Y Y
row 6 coded as an unsigned integer
Table 4 The length field in the quality block shall represent the number
R-132. 2 M Y Y Y Y
row 6 of quality sub-blocks.
If the number of quality blocks field is 0 then the
Table 4
R-133. Representation number field follows immediately after the 2 M Y Y Y Y
row 6
number of quality blocks field.
Table 4 Each quality sub-block shall consist of a quality score, a quality
R-134. 1 C Y Y Y Y
row 6 algorithm vendor identifier, and a quality algorithm identifier
Table 4 Each “Quality score” shall be encoded in one byte as an
R-135. 1 C Y Y Y Y
row 6 unsigned integer.
The quality score shall be recorded as a number between 0
Table 4
R-136. and 100, if quality has been computed, or a 255 if the quality 1 C Y Y Y Y
row 6
calculation has failed.
R-137. 7.4 The quality algorithm vendor ID shall be encoded in two bytes. 1 C Y Y Y Y
A value of all zeros in the quality algorithm vendor ID shall be
R-138. 7.4 1 M Y Y Y Y
used if the quality algorithm vendor is unreported.
The quality algorithm vendor ID shall be registered by IBIA or
R-139. 7.4 2 C Y Y Y Y
other approved registration authority.
R-140. 7.4 The quality algorithm ID shall be encoded in two bytes. 1 C Y Y Y Y
A value of all zeros in the quality algorithm ID shall be used if
R-141. 7.4 1 M Y Y Y Y
the quality algorithm is unreported
R-142. 7.4 The quality algorithm ID shall be registered by IBIA or other 3C O1 Y Y Y Y
© ISO/IEC 2015 – All rights reserved 9

ISO/IEC 19794-6:2011/Amd.1:2015(E)
approved registration authority.
Table 4
R-143. The representation number shall be coded in 2 bytes 1 M Y Y Y Y
row 7
Table 4 The representation number shall have a value representing the
R-144. 2 M Y Y Y Y
row 7 representation position sequence in the iris image record
Table 4 The representation number shall be a number between 1 and
R-145. 2 M Y Y Y Y
row 7 the number of iris representations
Table 4
R-146. The eye label field shall be coded in 1 byte 1 M Y Y Y Y
row 8
If the capture device is unable to determine which eye was
Table 4
R-147. presented, then the eye label shall be entered as “undefined” 3C O1 Y Y Y Y
row 8
(i.e. 00 ).
Hex
The one-byte eye label refers to the subject’s own eye. Valid
values are
Table 4
R-148. 1 M Y Y Y Y
SUBJECT_EYE_UNDEF = 0 (00 )
Hex
row 8
SUBJECT_EYE_RIGHT = 1 (01 )
Hex
SUBJECT_EYE_LEFT = 2 (02 )
Hex
Table 4
R-149. The image type field shall be coded in 1 byte 1 M Y Y Y Y
row 9
Table 4 The image type field shall have a value between the following
R-150. 1 M Y Y Y Y
row 9 list: 01 , 02 , 03 or 07
Hex Hex Hex Hex
Table 4
The Image Type field shall indicate the kind of image that
row 9
R-151. 3C O1 Y Y Y Y
follows.
7.4.1
Table 4
row 9 If the Image Type field is equal to 01 , an Uncropped iris
Hex
R-152. image shall be contained in the image data field, i.e. the image 3C O1 Y N N N
7.4.1
shall be a raster scan image of a single eye.
6.2
Table 4 For an uncropped image iris radius of R, there shall be margins
R-153. 2 C Y Y Y Y
row 9 of image data at least 0,2R above and below the iris
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
7.4.1
6.2
Table 4
row 9
For an uncropped image an iris radius of R, there shall be
R-154. margins of image data at least 0,6R to the right and left of the 2 C Y Y Y Y
7.4.1
iris.
6.2
Table 4 For an uncropped image, image data shall either be
row 9 compressed in accordance with the JPEG2000 protocol
R-155. specified in ISO/IEC 15444-1 and stored in JP2 file format, or 2 C Y Y N N
7.4.1
otherwise losslessly compressed in accordance with the PNG
protocol specified in ISO/IEC 15948:2003.
6.2
Table 4
row 9 For an uncropped image, PNG shall not be used in its
R-156. interlaced mode and not for images that have been 2 C Y Y N N
7.4.1
compressed lossily before.
6.2
Table 4
row 9 For an uncropped image, PNG shall not be used in its
R-157. interlaced mode and not for images that have been 3C O1 Y Y N N
7.4.1
compressed lossily before.
6.2
Table 4
row 9 If the Image Type field is equal to 02 , a VGA iris image shall
Hex
R-158. be contained in the image data field, i.e. the image shall have a 2 C N Y N N
7.4.1
resolution of 640x480 pixels.
6.3
Table 4
If the Image Type field is equal to 03 , a cropped rectilinear
Hex
row 9
iris image shall be contained in the image data field, i.e. the
R-159. 2 C N N Y Y
7.4.1 image shall have the iris centred relative to the geometric
centre of the raster representation.
6.4
R-160. If the Image Type field is equal to 03 , a cropped rectilinear 3C O1 N N Y Y
Table 4 Hex
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
row 9 iris image shall be contained in the image data field, i.e. the
image shall have the iris centred relative to the geometric
7.4.1
centre of the raster representation.
6.4
Table 4
row 9
For cropped rectilinear images, margin pixels shall represent
R-161. 3C O1 N N Y N
7.4.1 actual sensor readings, not substitute values.
6.4
Table 4
row 9 For cropped rectilinear images, parts of the iris estimated to
R-162. have been cropped during capture (i.e. absent in the input 3C O1 N N Y N
7.4.1
image) shall be replaced with pixels of value 0.
6.4
Table 4
If the Image Type field is equal to 07 , a cropped and masked
Hex
row 9
iris image shall be contained in the image data field, i.e. a
R-163. 3C O1 N N N Y
7.4.1 cropped and masked iris image which conforms to the
normative requirements of ISO/IEC 19794-6:2011 clause 6.5.
6.5
Table 4
row 9
For cropped and masked iris images, a mask shall consist of a
R-164. 3C O1 N N N Y
7.4.1 single grey value assigned to a four-connected region of pixels.
6.5
Table 4
row 9
For cropped and masked iris images, the pixels in the sclera
R-165. 3C O1 N N N Y
7.4.1 region shall be substituted with a fixed mask value of 200.
6.5.2
Table 4
For cropped and masked iris images, the sclera mask shall
row 9
extend to the first and last columns unless the extremes of the
R-166. 3C O1 N N N Y
7.4.1 upper and lower eyelids meet inside the left or right image
boundary.
6.5.2
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ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 4
row 9 For cropped and masked iris images, the pixels in the upper
R-167. and lower eyelid regions, if detected, shall be substituted with a 3C O1 N N N Y
7.4.1
fixed mask value of 128.
6.5.3
Table 4
row 9
For cropped and masked iris images, the upper eyelid mask
R-168. 3C O1 N N N Y
7.4.1 where present shall extend to the first (top) row of the image.
6.5.3
Table 4
row 9 For cropped and masked iris images, the upper eyelid mask
R-169. where present shall extend to the leftmost and rightmost 3C O1 N N N Y
7.4.1
columns of the image.
6.5.3
Table 4
For cropped and masked iris images, the lower eyelid mask
row 9
where present shall extend to the last (bottom) row of the
R-170. 3C O1 N N N Y
7.4.1 image. The lower eyelid mask shall extend to the leftmost and
rightmost columns of the image.
6.5.3
Table 4 For cropped and masked iris images, the transitions from iris
row 9 and sclera regions to the eyelid mask regions where present,
R-171. and from the iris to the sclera mask regions where present, 3C O1 N N N Y
7.4.1
shall be locally smoothed to minimize the boundary's impact on
6.5.4 the compression coding budget.
For cropped and masked iris images, the recommended the
Table 4
slope of the blurred transition to or from masked regions, or
row 9
between masked regions, shall not be larger than 15 grey
R-172. 3C O1 N N N Y
7.4.1 values per pixel. (For example, the transition between the
sclera mask value of 200 and the eyelid mask value of 128 may
6.5.4
occur over an interval of 5 pixels.)
Table 4
R-173. The Image Format field shall be coded in 1 byte 1 M Y Y Y Y
row 10
R-174. The only valid values for the Image Format field are: 1 M Y Y Y Y
Table 4
© ISO/IEC 2015 – All rights reserved 13

ISO/IEC 19794-6:2011/Amd.1:2015(E)
row 10 IMAGEFORMAT_MONO_RAW = 2 (0002 )
Hex
IMAGEFORMAT_MONO_JPEG2000 = 10 (000A )
Hex
IMAGEFORMAT_MONO_PNG = 14 (000E )
Hex
Table 4
R-175. The Iris image properties bit field shall be coded in one byte 1 M Y Y Y Y
row 11
Bits 1-2, i.e. least significant bits, of the Iris image properties bit
field shall be coded in the following way:
Table 4 ORIENTATION_UNDEF = 0
R-176. 1 M Y Y Y Y
row 11 HORZ_ORIENTATION_BASE = 1
HORZ_ORIENTATION_FLIPPED = 2
The image coded in the image data field, shall have the
Table 4
R-177. horizontal orientation specified in bits 1-2 of the Iris image 3C O1 Y Y Y Y
row 11
properties field
Bits 3-4 of the Iris image properties bit field shall be coded in
the following way:
Table 4
R-178. ORIENTATION_UNDEF = 0 1 M Y Y Y Y
row 11
VERT_ORIENTATION_BASE = 1
VERT_ORIENTATION_FLIPPED = 2
Table 4 The image coded in the image data field, shall have the vertical
R-179. 3C O1 Y Y Y Y
row 11 orientation specified in bits 3-4 of the Iris image properties field
Table 4
R-180. Bits 5-6 of the Iris image properties bit field shall be 0 1 M Y Y Y Y
row 11
Bits 7-8 of the Iris image properties bit field shall be coded in
the following way:
Table 4
R-181. PREVIOUS_COMPRESSION_UNDEF = 0 1 M Y Y Y Y
row 11
PREVIOUS_COMPRESSION_LOSSLESS_OR_NONE = 1
PREVIOUS_COMPRESSION_LOSSY = 2
The image coded in the image data field, shall have be coded
Table 4
R-182. with the compression technique declared in bits 7-8 of the Iris 3C O1 Y Y Y Y
row 11
image properties field
Table 4
R-183. The Image width field shall be coded in 2 bytes 1 M Y Y Y Y
row 12
Table 4
R-184. The Image width field shall contain the width in pixels. 1 M Y Y Y Y
row 12
14 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 4
R-185. The image width shall always be a positive non-zero value. 1 M Y Y Y Y
row 12
Table 4 The image data contained in the representation shall present
R-186. 2 M Y Y Y Y
row 12 the same width in pixels as the Image width field states
Table 4
R-187. The Image height field shall be coded in 2 bytes 1 M Y Y Y Y
row 13
Table 4
R-188. The Image height field shall contain the height in pixels. 1 M Y Y Y Y
row 13
Table 4
R-189. The image height shall always be a positive non-zero value. 1 M Y Y Y Y
row 13
Table 4 The image data contained in the representation shall present
R-190. 2 M Y Y Y Y
row 13 the same height in pixels as the Image height field states
Table 4
R-191. The Bit depth field shall be encoded in 1 byte 1 M Y Y Y Y
row 14
Table 4
R-192. The bit depth field contains the bit depth in bits per pixel. 1 M Y Y Y Y
row 14
Table 4 The bit depth field shall always be an integer greater or equal
R-193. 1 M Y Y Y Y
row 14 to 8
The image coded in the image data field shall represent an
Table 4
R-194. image with a bit depth corresponding to the one coded in this 3C O1 Y Y Y Y
row 14
field
Table 4
R-195. The Range field shall be coded in 2 bytes 1 M Y Y Y Y
row 15
The Range field shall specify an estimate of the distance
Table 4
R-196. between the optical centre of the camera lens and the subject 3C O1 Y Y Y Y
row 15
iris, measured in mm.
Valid values for the Range field are:
0 – for an unassigned value
Table 4
R-197. 1 – for a failed measurement 1 M Y Y Y Y
row 15
2 … 2 – 2
2 – 1 for a range overflow
© ISO/IEC 2015 – All rights reserved 15

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 4
R-198. The Roll angle of eye field shall be coded in 2 bytes 1 M Y Y Y Y
row 16
The roll angle of eye field is obtained as (unsigned short) round
Table 4
R-199. (65 535* angle/360) modulo 65 535, where angle is measured 3C O1 Y Y Y Y
row 16
counter-clockwise in degrees.
Table 4 The Roll angle of eye field shall be coded as FFFF if the
Hex
R-200. 1 M Y Y Y Y
row 16 value is undefined
If the relative roll angle between head and camera is measured
and recorded in field 16, it shall be measured in degrees
Table 4
between the horizontal axis of the camera system and the line
row 16
R-201. 3C O1 Y Y Y Y
between the centres of the two eyes, with a positive value
7.4.2.1
signifying counter-clockwise rotation, as seen from the camera,
of the line between the eyes.
Table 4
R-202. The Roll angle uncertainty field shall be coded in 2 bytes 1 M Y Y Y Y
row 17
Table 4
The roll angle uncertainty shall be measured as a nonzero
row 17
R-203. 1 M Y Y Y Y
value in degrees.
7.4.2.2
Table 4
If roll angle information is not available then the roll angle
row 17
R-204. 3C O1 Y Y Y Y
uncertainty value 17 shall be set to FFFF .
Hex
7.4.2.2
Table 4
R-205. The Iris centre, smallest X field shall be coded in 2 bytes 1 M Y Y Y Y
row 18
Table 4 Smallest expected iris centre X coordinate is stated in pixels. If
R-206. 1 M Y Y Y Y
row 18 undefined, it shall be set to 0.
Table 4 Smallest expected iris centre X coordinate in pixels shall be
R-207. 2 M Y Y Y Y
row 18 lower than the image width
Table 4
R-208. The Iris centre, largest X field shall be coded in 2 bytes 1 M Y Y Y Y
row 19
Table 4 Largest expected iris centre X coordinate is stated in pixels. If
R-209. 1 M Y Y Y Y
row 19 undefined, it shall be set to 0.
16 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table 4 Largest expected iris centre X coordinate in pixels shall be
R-210. 2 M Y Y Y Y
row 19 lower than the image width
Table 4
R-211. The Iris centre, smallest Y field shall be coded in 2 bytes 1 M Y Y Y Y
row 20
Table 4 Smallest expected iris centre Y coordinate is stated in pixels. If
R-212. 1 M Y Y Y Y
row 20 undefined, it shall be set to 0.
Table 4 Smallest expected iris centre Y coordinate in pixels shall be
R-213. 2 M Y Y Y Y
row 20 lower than the image height
Table 4
R-214. The Iris centre, largest Y field shall be coded in 2 bytes 1 M Y Y Y Y
row 21
Table 4 Largest expected iris centre y coordinate is stated in pixels. If
R-215. 1 M Y Y Y Y
row 21 undefined, it shall be set to 0.
Table 4 Largest expected iris centre Y coordinate in pixels shall be
R-216. 2 M Y Y Y Y
row 21 lower than the image height
Table 4
R-217. The Iris diameter, smallest field shall be coded in 2 bytes 1 M Y Y Y Y
row 22
Table 4 Smallest expected iris diameter is stated in pixels. If undefined,
R-218. 1 M Y Y Y Y
row 22 it shall be set to 0.
Table 4 Smallest expected iris diameter in pixels shall be lower or equal
R-219. 2 M Y Y Y Y
row 22 to the minimum from the iris width and the iris height
Table 4
R-220. The Iris diameter, largest field shall be coded in 2 bytes 1 M Y Y Y Y
row 23
Table 4 Largest expected iris diameter is stated in pixels. If undefined,
R-221. 1 M Y Y Y Y
row 23 it shall be set to 0
Table 4 Largest expected iris diameter in pixels shall be lower or equal
R-222. 2 M Y Y Y Y
row 23 to the minimum from the iris width and the iris height
Table 4 The iris representation header shall be concluded by the length
R-223. 1 M Y Y Y Y
row 24 of the image data, which follow the header.
R-224. The Image length field shall be encoded in 4 bytes. 1 M Y Y Y Y
Table 4
© ISO/IEC 2015 – All rights reserved 17

ISO/IEC 19794-6:2011/Amd.1:2015(E)
row 24
Table 4
R-225. The Image length shall always be a positive non-zero value 1 M Y Y Y Y
row 24
Table 4 The image data field shall have the same number of bytes as
R-226. 2 M Y Y Y Y
row 24 the Image length field states
Each iris image is preceded by an iris image header that
contains an image sequence number plus information about
R-227. 7.2 3C O1 Y Y Y Y
the Image Type, size, origin, quality and rotation for that image,
as stated in Table 4.
Each image shall be padded with extra bits, if necessary, to
R-228. 7.2 1 M Y Y Y Y
end on an integral byte boundary.
Status Notes:
The following short notes provide more details about why a specific conformance test assertion is not specified for the corresponding requirement(s):
O1 - Level 3 Assertion is too difficult to test. No method has been defined to test the conformance of the IUT or BDIR for this mandatory requirement of the base standard.
18 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
A.3 Table of test assertions
A.3.1 Level 1 and Level 2 conformance assertions for common requirements
The specific test assertions required for conformance testing of this international standard are listed in Table
A.2. The conformance test assertions are listed in the order in that the corresponding fields are required to
appear, if present, in a conforming record.
Table A.2 only refers to those test assertions that are common to all data formats. In subsequent clauses,
specific test assertions will be addressed for each of the data formats. Table A.2 extends over multiple pages.
NOTE TO ISO EDITOR: it is required to repeat the title of all tables in this document wherever the table
extends over multiple pages.
© ISO/IEC 2015 – All rights reserved 19

ISO/IEC 19794-6:2011/Amd.1:2015(E)
Table A.2 —Level 1 and Level 2 Conformance Binary Encoded Test Assertions for Common Requirements
Test Requirement Test IUT Supported Test
References Level Field name Operator Operand
Number ID Note Support Range result
General header
T-1 T. 3 row 1, 7.1 R-1, R-2, R-20 1 Format Identifier EQ 49495200
Hex
T-2 T. 3 row 1, 7.1 R-1, R-2, R-20 1 Format Identifier NEQ 00524949 1
Hex
T-3 T. 3 row 2, 7.1 R-3, R-4, R-20 1 Version number EQ 30323000
Hex
T-4 T. 3 row 2, 7.1 R-3, R-4, R-20 1 Version number NEQ 00303230 1
Hex
T-5 T. 3 row 3 R-5, R-6 1 Length of Record EQ 69 to (2 - 1) 2
T-6 T. 3 row 3 R-5, R-6 2 Length of Record EQ Total Bytes Read 2
T-7 T. 3 row 3 R-5, R-6 2 Length of Record EQ Total Bytes Expected 2
T-8 T. 3 row 4 R-8 to R-11 1 Number of Iris Representations EQ 1 to 65535
T-9 T. 3 row 4 R-8 to R-11 2 Number of Iris Representations EQ Number of Images Read 3
T-10 T. 3 row 5 R-12 to R-14 1 Certification flag EQ 0
T-11 T. 3 row 6 R-15, R-16 1 Number of eyes represented EQ 0 to 2
T-12 T. 3 row 6 R-17, R-19 2 Number of eyes represented EQ NUMBER_EYES_REPRESENTED 4
7.1, 7.2 and R-24, R-25, R-
T-13 1 Structure of the biometric data record 5
7.3 100
Representation header
T-100 T. 4 row 1 R-101, R-102 1 Representation Length EQ 53 to ((2 – 1) – 16)
T-101 T. 4 row 1 R-103 2 Representation Length EQ Total Bytes Expected 6
R-104, R-105,
T-102 T. 4 row 2 1 Gregorian calendar year of the capture date EQ 0001 to FFFF 7
Hex Hex
R-106
R-104, R-105,
T-103 T. 4 row 2 1 Month of the capture date EQ 01 to 0C or FF 7
Hex Hex Hex
R-107
R-104, R-105,
T-104 T. 4 row 2 1 Day of the capture date EQ 01 to 1F or FF 7
Hex Hex Hex
R-108
R-104, R-105,
T-105 T. 4 row 2 1 Hour of the capture time EQ 00 to 17 or FF 7
Hex Hex Hex
R-109
R-104, R-105,
T-106 T. 4 row 2 1 Minute of the capture time EQ 00 to 3B or FF 7
Hex Hex Hex
R-110
R-104, R-105,
T-107 T. 4 row 2 1 Second of the capture time EQ 00 to 3B or FF 7
Hex Hex Hex
R-111
R-104, R-105,
T-108 T. 4 row 2 1 Millisecond of the capture time EQ 0000 to 03E7 or FFFF 7
Hex Hex Hex
R-112
T-109 T. 4 row 3 R-114, R-115 1 Capture device technology identifier EQ 0 to 1
0000 to FFFF , being the value
Hex Hex
R-118 to R- either 0 for unreported, or a value
T-110 T. 4 row 4 1 Capture device vendor ID EQ
120 previously approved by a registration
authority (e.g. IBIA)
20 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
0000 to FFFF , being the value
Hex Hex
R-122 to R- either 0 for unreported, or a value
T-111 T. 4 row 5 1 Capture device type ID EQ
124 previously approved by a registration
authority (e.g. IBIA)
R-125 to R-
T-112 T. 4 row 6 1, 2 Number of quality subblocks EQ 00 to FF 7
Hex Hex
R-134 to R-
T-113 T. 4 row 6 1 Quality score EQ 00 to 64 or FF if present 7
Hex Hex Hex
R-134, R-137
T-114 T. 4 row 6 1 Quality algorithm vendor ID EQ 0000 to FFFF if present 7
Hex Hex
to R-138
R-134, R-140
T-115 T. 4 row 6 Quality algorithm ID EQ 0000 to FFFF if present 7
Hex Hex
to R-141
T-116 T. 4 row 7 R-143 1 Representation number EQ 1 to 65535
1 if it is the first representation in the
record
T-117 T.4 row 7 R-144 2 Representation number EQ {Representation number from the
previous representation} +1 in any other
case
T-118 T. 4 row 7 R-145 2 Representation number LTE Number of Representations
T-119 T. 4 row 8 R-146, R-148 1 Eye label EQ 0 to 2
T-120 T. 4 row 9 R-149, R-150 1 Image Type EQ 1, 2, 3 or 7
T-121 T. 4 row 10 R-173, R-174 1 Image format EQ 2, 10 or 14
T-122 T.4 row 10 R-173, R-174 2 Image Format C 8
Iris image properties bit field
R-21, R-175,
T-123 T. 4 row 11 1 Bits 1-2 (i.e. least significant bits) (Horizontal EQ 0 to 2
R-176
orientation)
R-21, R-175, Iris image properties bit field
T-124 T. 4 row 11 1 EQ 0 to 2
R-178 Bits 3-4 (Vertical orientation)
R-21, R-175, Iris image properties bit field
T-125 T. 4 row 11 1 EQ 0
R-180 Bits 5-6
R-21, R-175, Iris image properties bit field
T-126 T. 4 row 11 1 EQ 0 to 2
R-181 Bits 7-8 (Compression history)
R-183 to R-
T-127 T. 4 row 12 1 Image width EQ 1 to 65535
T-128 T. 4 Row 12 R-186 2 Image width EQ Value in the coded image 9
R-187 to R-
T-129 T. 4 row 13 1 Image height EQ 1 to 65535
T-130 T. 4 Row 13 R-190 2 Image height EQ Value in the coded image 9
R-191 to R-
T-131 T. 4 row 14 1 Bit-depth EQ 8 to 16
T-132 T. 4 row 15 R-195, R-197 1 Range EQ 0 to 65535
T-133 T. 4 row 16 R-198, R-200 1 Roll angle of eye EQ 0 to 65535
T-134 T. 4 row 17 R-202, R-203 1 Roll angle uncertainty EQ 0 to 65535
© ISO/IEC 2015 – All rights reserved 21

ISO/IEC 19794-6:2011/Amd.1:2015(E)
T-135 T. 4 row 18 R-205, R-206 1 Iris centre, lowest X EQ 0 to 65535
T-136 T. 4 row 18 R-207 2 Iris centre, lowest X LESS THAN Image width
T-137 T. 4 row 19 R-208, R-209 1 iris centre, highest X EQ 0 to 65535
T-138 T. 4 row 19 R-210 2 iris centre, highest X LESS THAN Image width
T-139 T. 4 row 20 R-211, R-212 1 Iris centre, lowest Y EQ 0 to 65535
T-140 T. 4 row 20 R-213 2 Iris centre, lowest Y LESS THAN Image height
T-141 T. 4 row 21 R-214, R-215 1 Iris centre, highest Y EQ 0 to 65535
T-142 T. 4 row 21 R-216 2 Iris centre, highest Y LESS THAN Image height
T-143 T. 4 row 22 R-217, R-218 1 Iris diameter, lowest EQ 0 to 65535
LESS or EQ
T-144 T. 4 row 22 R-219 2 Iris diameter, lowest Minimum({Image width},{Image height})
THAN
T-145 T. 4 row 23 R-220, R-221 1 Iris diameter, highest EQ 0 to 65535
LESS or EQ
T-146 T. 4 row 23 R-222 2 Iris diameter, highest Minimum({Image width},{Image height})
THAN
R-223 to R-
T-147 T. 4 row 24 1 Image Length EQ 1 to ((2 – 1) – 69)
T-148 T. 4 row 24 R-226 2 Image Length EQ Total Data Bytes Read
22 © ISO/IEC 2015 – All rights reserved

ISO/IEC 19794-6:2011/Amd.1:2015(E)
A.3.2 Level 1 and Level 2 specific conformance assertions for Type 01 data format
The specific test assertions required for conformance testing of this international standard are listed in Table
A.3. The conformance test assertions are listed
...