AS ISO/IEC 39794.6:2023 identically adopts and modifies ISO/IEC 39794 6:2021 which specifies generic extensible data interchange formats for the representation of iris image data
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Conformance
6 Iris image content specification
6.1 General
6.2 Uncropped iris image
6.3 VGA iris image
6.4 Cropped iris image
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
6.5.4 Mask transition blurring
7 Abstract data elements
7.1 Purpose and overall structure
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
7.3.5 Image data format
7.3.6 Horizontal orientation
7.3.7 Vertical orientation
7.3.8 Compression history
7.3.9 Capture date/time block
7.3.10 Iris image data
7.3.11 Range
7.3.12 Capture device block
7.3.12.1 Model identifier block
7.3.12.2 Capture device technology identifier
7.3.12.3 Certification identifier blocks
7.3.13 Quality blocks
7.3.14 Roll angle block
7.3.14.1 General
7.3.14.2 Relative roll angle
7.3.14.3 Roll angle uncertainty
7.3.15 Localization block
7.3.15.1 General
7.3.15.2 Iris centre X smallest
7.3.15.3 Iris centre X largest
7.3.15.4 Iris centre Y smallest
7.3.15.5 Iris centre Y largest
7.3.15.6 Iris diameter smallest
7.3.15.7 Iris diameter largest
7.3.16 PAD data block
8 Encoding
8.1 Tagged binary encoding
8.2 XML encoding
9 Registered BDB format identifiers
Annex A
A.1 ASN.1 module for tagged binary encoding
A.2 XML schema definition for XML encoding
Annex B
B.1 Sample ASN.1 encoding for iris image data
B.2 Sample XML encoding for iris image data
Annex C
C.1 Overview
C.2 Conformance test assertions
C.3 Additional information about image file formats (informative)
C.3.1 PNG file format
C.3.2 JP2 file format
Annex D
D.1 Modulation Transfer Function and spatial sampling rate
D.2 Compression ranges and recommended roles for the image types
