BWS 3 Face Image Quality API

In contrast to the QualityCheck API we provided with the classic BWS, which was implemented by BioID according to the requirements mainly specified by ICAO (Document 9303), we now rely on an the Open Source Face Image Quality (OFIQ) implementation of the ISO/IEC 29794-5:2025 standard.

The ISO/IEC 29794-5:2025 standard establishes requirements on implementations that quantify how a face image’s properties conform with those of canonical face images, for example those specified in ISO/IEC 39794-5:2019, Clause D.1.

With BWS 3 we provide a face image quality measurement API implementation that calls into the Open Source Face Image Quality (OFIQ) library. With this library we currently perform these 28 quality measures.

Please note that this library is subject of the OFIQ License

Service Definition

Use the Protobuf files below to integrate the BWS 3 Face Image Quality gRPC API into your client software. When you plan to use the JSON Web API, you don't need these Protobuf files, of course. However, the JSON Web API is generated from the Face Image Quality protobuf file.

• faceimagequality.proto: Definition of the BWS 3 Face Image Quality API.
• bwsmessages.proto: Definition of messages as used in various BWS 3 APIs.

Endpoint

All BWS 3 APIs (gRPC API and JSON Web API) can be found at the grpc subdomain of the various BWS 3 installation locations: https://grpc.{bws-location}.bioid.com, e.g.: https://grpc.bws-eu.bioid.com.