BS ISO/IEC 39794-6:2021

This standard BS ISO/IEC 39794-6:2021 Information technology. Extensible biometric data interchange formats is classified in these ICS categories:

• 35.240.15 Identification cards and related devices

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.