Knowledge / Standards
Standards shelf
Plain-language explainers for the underlying biometric and machine-readable travel document standards that drive almost every country's portrait rules.
- Updated May 24, 20269 min read
ICAO 9303 biometric photo standards
The international portrait standard behind many passport and visa photo requirements.
- Updated May 22, 20266 min read
ISO/IEC 19794-5 biometric face image
The engineering-level specification behind passport portraits - what it measures, how its quality bands work, and how automated face checks score against it.
- Updated May 20, 20265 min read
ICAO 9303 portrait standard
How the International Civil Aviation Organization defines the portrait that goes into a machine-readable passport, and why almost every national photo rule traces back to it.