ISO/IEC 39794-4:2019/Amd 1:2023

INTERNATIONAL ISO/IEC
STANDARD 39794-4
First edition
2019-12
AMENDMENT 1
2023-08
Information technology — Extensible
biometric data interchange formats —
Part 4:
Finger image data
AMENDMENT 1: Extension towards
improved interoperability with ANSI/
NIST-ITL
Reference number
ISO/IEC 39794-4:2019/Amd. 1:2023(E)
© ISO/IEC 2023

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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
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© ISO/IEC 2023
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Published in Switzerland
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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
Foreword
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This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 37, Biometrics.
A list of all parts in the ISO/IEC 39794 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
Information technology — Extensible biometric data
interchange formats —
Part 4:
Finger image data
AMENDMENT 1: Extension towards improved interoperability
with ANSI/NIST-ITL

7.3
Replace:
“The year shall be the year of the publication of this document.”
with:
“The year shall be the year of the publication of the standard or amendment or corrigendum that
specifies the used version of the format.”

8.2
Add:
“The encoding example in Clause B.2 is available at https:// standards .iso .org/ iso -iec/ 39794/ -4/ ed -1/
en. The XSD in Clause A.4 extends the XSD in Clause A.2 by allowing the use of the same palm position
[3]
codes and impression codes as ANSI/NIST ITL 1. The XSD in Clause A.4 and the encoding example in
Clause B.3 are available at https:// standards .iso .org/ iso -iec/ 39794/ -4/ ed -1/ en/ amd/ 1.”

Annex A
Insert the following text as Clause A.3.
A.3  ANSI-NIST ITL Harmonized ASN.1 module for tagged binary encoding
ISO-IEC-39794-4-ed-1-v2 {iso(1) standard(0) iso-iec-39794(39794) part-4(4) ed-1(1) v2(2)
iso-iec-39794-4(0)}

-- Permission is hereby granted, free of charge in perpetuity, to any person
-- obtaining a copy of this ASN.1 module, to use, copy, modify, merge and
-- distribute free of charge, copies of the ASN.1 module for the purposes of
-- developing, implementing, installing and using software based on the ASN.1
-- module, and to permit persons to whom the ASN.1 module is furnished to do so,
-- subject to the following conditions:
--
-- THE ASN.1 MODULE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
--
-- IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-- OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION WITH THE ASN.1 MODULE OR THE
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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
-- USE OR OTHER DEALINGS IN THE ASN.1 MODULE.

DEFINITIONS IMPLICIT TAGS ::= BEGIN

  IMPORTS
   QualityBlocks,
   ScoreOrError,
   RegistryIdBlock,
   CertificationIdBlocks,
   CaptureDateTimeBlock,
   PADDataBlock,
   VersionBlock,
   CoordinateCartesian2DUnsignedShortBlock,
   ExtendedDataBlock
  FROM ISO-IEC-39794-1-ed-1-v1;

  PositionCode ::= ENUMERATED {
   unknownPosition(0),
   rightThumbFinger(1),
   rightIndexFinger(2),
   rightMiddleFinger(3),
   rightRingFinger(4),
   rightLittleFinger(5),
   leftThumbFinger(6),
   leftIndexFinger(7),
   leftMiddleFinger(8),
   leftRingFinger(9),
   leftLittleFinger(10),
   rightFourFingers(13),
   leftFourFingers(14),
   bothThumbFingers(15),
   rightExtraDigitFinger(16),
   leftExtraDigitFinger(17),
   unknownFrictionRidge(18),
   entireJointImage(19),
   unknownPalm(20),
   rightFullPalm(21),
   rightWritersPalm(22),
   rightLowerPalm(23),
   rightUpperPalm(24),
   rightOtherPalm(25),
   rightInterdigital(26),
   rightThenar(27),
   rightHypothenar(28),
   leftFullPalm(29),
   leftWritersPalm(30),
   leftLowerPalm(31),
   leftUpperPalm(32),
   leftOtherPalm(33),
   leftInterdigital(34),
   leftThenar(35),
   leftHypothenar(36),
   rightGrasp(37),
   leftGrasp(38),
   rightIndexMiddleFingers(40),
   rightMiddleRingFingers(41),
   rightRingLittleFingers(42),
   leftIndexMiddleFingers(43),
   leftMiddleRingFingers(44),
   leftRingLittleFingers(45),
   rightIndexLeftIndexFingers(46),
   rightIndexMiddleRingFingers(47),
   rightMiddleRingLittleFingers(48),
   leftIndexMiddleRingFingers(49),
   leftMiddleRingLittleFingers(50),
   rightFourFingertips(51),
   leftFourFingertips(52),
   rightFingertips(53),
   leftFingertips(54),
   leftMiddleIndexRightIndexMiddleFingers(55),
   unknownSole(60),
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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
   rightSole(61),
   leftSole(62),
   unknownToe(63),
   rightBigToe(64),
   rightSecondToe(65),
   rightMiddleToe(66),
   rightFourthToe(67),
   rightLittleToe(68),
   leftBigToe(69),
   leftSecondToe(70),
   leftMiddleToe(71),
   leftFourthToe(72),
   leftLittleToe(73),
   rightFrontBallFoot(74),
   rightBackHeelFoot(75),
   leftFrontBallFoot(76),
   leftBackHeelFoot(77),
   rightMiddleFoot(78),
   leftMiddleFoot(79),
   rightCarpalDelta(81),
   leftCarpalDelta(82),
   rightFullWithWriterPalm(83),
   leftFullWithWriterPalm(84),
   rightBracelet(85),
   leftBracelet(86),
   otherPosition(999)
  }

  AnsiNistItlPalmPositionCode ::= ENUMERATED {
   leftFullPalm(23),
   leftWritersPalm(24),
   rightLowerPalm(25),
   rightUpperPalm(26),
   leftLowerPalm(27),
   leftUpperPalm(28),
   rightOtherPalm(29),
   leftOtherPalm(30),
   rightInterdigital(31),
   rightThenar(32),
   rightHypothenar(33)
  }

  PositionExtensionBlock ::= SEQUENCE {
   fallback [0] PositionCode,
   .,
   [[2022: -- added in ISO/IEC 39794-4:2019/Amd.1:2022
    ansiNistItlPalmPositionCode [1] AnsiNistItlPalmPositionCode OPTIONAL
   ]]
  }

  Position ::= CHOICE {
   code [0] PositionCode,
   extensionBlock [1] PositionExtensionBlock
  }

  ImpressionCode ::= ENUMERATED {
   plainContact(0),
   rolledContact(1),
   latentImage(4),
   swipeContact(8),
   stationarySubjectContactlessPlain(24),
   stationarySubjectContactlessRolled(25),
   movingSubjectContactlessPlain(41),
   movingSubjectContactlessRolled(42),
   otherImpression(28),
   unknownImpression(29)
  }

  AnsiNistItlImpressionCode ::= ENUMERATED {
   movingSubjectContactlessRolled(41),
   movingSubjectContactlessPlain(42)
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ISO/IEC 39794-4:2019/Amd. 1:2023(E)
  }

  ImpressionExtensionBlock ::= SEQUENCE {
   fallback [0] ImpressionCode,
   .,
   [[2022: -- added in ISO/IEC 39794-4:2019/Amd.1:2022
    ansiNistItlImpressionCode [1] AnsiNistItlImpressionCode OPTIONAL
   ]]
  }

  Impression ::= CHOICE {
   code [0] ImpressionCode,
   extensionBlock [1] ImpressionExtensionBlock
  }

  CaptureDeviceTechnologyIdCode ::= ENUMERATED {
   unknownCaptureDeviceTechnology(0),
   otherCaptureDeviceTechnology(1),
   scannedInkOnPaper(2),
   opticalTIRBrightField(3),
   opticalTIRDarkField(4),
   opticalImage(5),
   opticalLowFrequency3DMapped(6),
   opticalHighFrequency3DMapped(7),
   capacitive(9),
   capacitiveRF(10),
   electroLuminescence(11),
   reflectedUltrasonic(12),
   impediographicUltrasonic(13),
   thermal(14),
   directPressure(1
...