I'm designing a c# application for an access control turnstile with biometric verification. The turnstile uses the ZKTeco SF300 (IP) fingerprint scanner.
For registration (at a receptionist's desk a significant distance from the turnstile), I want to use the Digital Persona UrU4500 (USB) to obtain fingerprints (either image or template/FMD - using their FingerJet SDK); just because it's cheaper than buying another SF300 unit. Then I'll extract_&_upload (if image) or just upload(if FMD) the template as FPtemplate for a new user struct into the SF300 & DB.
However, checking the ZKTeco ZKemKeeper API, I can't find any methods for extracting templates from images, so I can't use image.
I think both ZKTeco & CrossMatch templates/FMDs abide by the NIST biometric standards. Will that make their templates/FMDs compatible?
Or is there no escaping buying another SF300 unit?
Yes, there is an alternative to buying another SF300 unit.
For avoiding troubleshooting with the templates and the algorithms, I recommend you to look for the ZK9500 instead of the Digital Persona UrU4500 .
It doesn´t work directly with the zkemkeeper, but using it´s driver and API you can obtain the templates used by the zkemkeeper. Don´t forget to check that the SF300´s biokey version is compatible with this device and that you have configured it to use the same version that the ZK9500 (otherwise it won´t work). If it isn´t compatible, ask to your dealer in order to obtain a compatible model.
For programming questions on how to obtain the templates... Getting the template using this API It´s not a trivial task, but I think that they have available one demo with the source code, so you can take a look and extract the information you need in order to obtain the fingerprint templates.