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BS ISO/IEC 39794-6:2021

BS ISO/IEC 39794-6:2021

$189.07

Information technology. Extensible biometric data interchange formats – Iris image data

Published By Publication Date Number of Pages
BSI 2021 46
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This document specifies:

  • generic extensible data interchange formats for the representation of iris image data: a tagged binary data format based on an extensible specification in ASN.1 and a textual data format based on an XML schema definition that are both capable of holding the same information,

  • examples of data record contents,

  • application specific requirements, recommendations, and best practices in data acquisition, and

  • conformance test assertions and conformance test procedures applicable to this document.

The iris image information is stored as:

  • an array of intensity values optionally compressed with ISO/IEC 15948 or ISO/IEC 15444-1 , or

  • an array of intensity values optionally compressed with ISO/IEC 15948 or ISO/IEC 15444-1 that can be cropped around the iris, with the iris at the centre, and which can incorporate region-of-interest masking of non-iris regions.

This document also specifies elements of conformance testing methodology, test assertions, and test procedures, as applicable to this document.

It establishes:

  • test assertions pertaining to the structure of the iris image data format, as specified in Clauses 6, 7, 8 and 9 of this document,

  • test assertions pertaining to internal consistency by checking the types of values that may be contained within each field, and

  • semantic test assertions.

The conformance testing methodology specified in this document does not establish:

  • tests of other characteristics of biometric products or other types of testing of biometric products (e.g. acceptance, performance, robustness, security), or

  • tests of conformance of systems that do not produce data records conforming to the requirements of this document.

This document does not establish:

  • requirements on the optical specifications of cameras, or

  • requirements on photometric properties of iris images, or

  • requirements on enrolment processes, workflow and use of iris equipment.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Foreword
7 Introduction
8 1 Scope
9 2 Normative references
3 Terms and definitions
10 4 Symbols and abbreviated terms
11 5 Conformance
6 Iris image content specification
6.1 General
12 6.2 Uncropped iris image
13 6.3 VGA iris image
6.4 Cropped iris image
14 6.5 Cropped and masked iris image
6.5.1 General
6.5.2 Masking of the sclera
6.5.3 Masking of the eyelids
15 6.5.4 Mask transition blurring
16 7 Abstract data elements
7.1 Purpose and overall structure
18 7.2 Version block
7.3 Representation block
7.3.1 General
7.3.2 Eye label
7.3.3 Iris image kind
7.3.4 Bit depth
19 7.3.5 Image data format
20 7.3.6 Horizontal orientation
7.3.7 Vertical orientation
7.3.8 Compression history
21 7.3.9 Capture date/time block
7.3.10 Iris image data
7.3.11 Range
7.3.12 Capture device block
22 7.3.13 Quality blocks
7.3.14 Roll angle block
23 7.3.15 Localization block
24 7.3.16 PAD data block
8 Encoding
8.1 Tagged binary encoding
8.2 XML encoding
9 Registered BDB format identifiers
26 Annex A (normative) Formal specifications
33 Annex B (informative) Encoding examples
34 Annex C (normative) Conformance testing methodology
40 Annex D (informative) Iris image capture
44 Bibliography

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BS ISO/IEC 39794-6:2021
$189.07