ISO/IEC 39794-4:2019 PDF

Name: ISO/IEC 39794-4:2019 — Information technology — Extensible biometric data interchange formats — Part 4: Finger image data
SKU: ISO/IEC 39794-4:2019
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Information technology — Extensible biometric data interchange formats — Part 4: Finger image data

Название (английский):

ISO/IEC 39794-4:2019

Information technology — Extensible biometric data interchange formats — Part 4: Finger image data

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 97
Дата публикации:: 20 декабря 2019 г.
Издание:: ISO/IEC IS 39794 edition 1 version 1
ICS:: 35.240.15

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Описание (английский):

This document specifies: — generic extensible data interchange formats for the representation of friction ridge 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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/IEC 39794-4:2019 defines extensible biometric data interchange formats for finger image data (fingerprint and palm images). It provides both a tagged binary encoding (based on ASN.1 and Distinguished/Basic Encoding Rules) and an XML encoding (XML Schema), enabling interoperable exchange of raw and processed friction‑ridge images and associated metadata. The standard is part of the ISO/IEC 39794 series - a third‑generation approach to biometric interchange formats designed for extensibility and future compatibility.

Key topics and technical requirements

Dual encodings: Tagged binary (ASN.1 TLV) and textual (XML) encodings that can contain equivalent information for the same record.

Extensible data model: ASN.1‑based specification supports future extensions without breaking interoperability.

Image representation and metadata: Definitions and requirements for colorspace, bit‑depth, pixel aspect ratio, image spatial sampling rate, image rotation, and supported image formats (e.g., PGM encoding reference).

Capture guidance and best practices: Recommendations for acquisition of fingerprint and palm images (capture conditions, device considerations, segmentation, annotation).

Quality and certification: Data elements for image quality, capture device identification, capture date/time, and certification identifiers; annexes provide capture device certification rules.

Compression and formats: Includes normative references and a WSQ greyscale finger image compression specification (annex) for near‑lossless compression options.

Presentation attack detection (PAD) & vendor blocks: Support for PAD data blocks and vendor‑specific data blocks to carry additional implementation details.

Conformance: Conformance test assertions, procedures and methodology are specified (normative annex) to validate implementations.

Practical applications and who uses it

Biometric system vendors - encoding enrolment and probe images to ensure interoperability across algorithms and platforms.

Government and border control - storing or exchanging fingerprint images on ID documents, ePassports, or national databases.

Law enforcement and forensics - sharing high‑resolution friction ridge images between agencies.

Integrators and software developers - implementing image capture, storage, matching, and transmission modules that conform to an extensible standard.

Certification labs and test houses - applying the conformance test procedures and device certification guidelines in the annexes.

Related standards

ISO/IEC 19794 series (earlier fingerprint/image interchange formats)

ISO/IEC 8824 / 8825 (ASN.1 and encoding rules)

ISO/IEC 2382‑37 (biometrics vocabulary)

Keywords: ISO/IEC 39794-4:2019, finger image data, biometric data interchange formats, ASN.1, XML, friction ridge, fingerprint image, WSQ compression, conformance testing, capture recommendations.

ISO/IEC 39794-4:2019 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and who uses it

Related standards

Технические детали

BS ISO/IEC 39794-17:2021

Information technology. Extensible biometric data interchange formats. Gait image sequence data.

BS ISO/IEC 29109-10:2010

Information technology. Conformance testing methodology for biometric data interchange formats defined in ISO…

ISO/IEC 8824-1:2015/Amd 1:2019

Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1: — Am…

SIST EN ISO/IEC 2382-37:2024

Information technology - Vocabulary - Part 37: Biometrics (ISO/IEC 2382-37:2022)