ISO/IEC 39794-16:2021

Overview

ISO/IEC 39794-16:2021 defines an extensible, interoperable data format for exchanging full body image data in biometric recognition systems. The standard ensures that full human body photographs and video-derived image sequences used for identification, verification, human examination, or forensic comparison are captured, encoded and annotated in ways that support automated matching and human review. It provides a structured format compatible with ISO/IEC 39794-5 and includes application-specific profiles (scene constraints, photographic properties and digital image attributes) in annexes. Note: 3D encoding types “3D point map” and “range image” are not supported.

Key topics and technical requirements

• Extensible data format compatible with other 39794 parts for consistent interchange of biometric body images and metadata.
• Application profiles and annexes that specify scene constraints, photographic properties and digital attributes (e.g., image spatial sampling rate, image size, colour and greyscale requirements).
• Modality-specific blocks and metadata including capture device block, representation block, capture date/time, session identifier, model and certification identifiers.
• Quality and PAD: support for quality blocks and PAD (presentation attack detection) data to aid automated and human validation.
• Pose, landmarks and anthropometry: specification of body pose angles (yaw, pitch, roll), landmark blocks and anthropometric references to support alignment and automated feature extraction.
• Image representation and processing: guidelines for image encoding, formatting, post-acquisition processing, and indications of lossy transformations.
• Imaging guidance: recommendations for white-light photography, non-white-light (infrared, ultraviolet), submillimetre imaging, camera-to-subject distance, optical distortion, color fidelity and studio setups to ensure usable biometric images.
• Conformance clauses describing how systems can claim compliance with the standard.

Applications

• Automated body biometric verification and identification (one-to-one and one-to-many).
• Support for human identity verification and forensic examination using full body images and video frames (including surveillance sources).
• Interoperable exchange of body image data between vendors, law enforcement, border control, hospitals (cadaver identification), and forensic labs.
• Integration into biometric enrollment, watchlist matching, and multi-modal biometric systems.

Who should use this standard

• Biometric system developers, image capture hardware manufacturers, and software integrators.
• Government agencies (border control, law enforcement), forensic practitioners and privacy/compliance teams.
• Vendors producing video surveillance systems, identity management platforms, and biometric data exchange solutions.

Related standards

• ISO/IEC 39794 series (notably ISO/IEC 39794-5) for structural compatibility and consistent biometric data interchange.

Keywords: ISO/IEC 39794-16:2021, full body image data, extensible biometric data interchange formats, biometric recognition, video surveillance, photographic properties, image spatial sampling rate.